Low Spec spectrometer

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Discover a selection of preconfigured spectrometers and custom sensing solutions. Our world-class experts are available to help find answers to your toughest questions Agilent offers products and support to meet all your lab needs. Learn more at Agilent.com. Agilent is a leader in the life sciences, diagnostics, and applied chemical markets UPDATE: 26 February 2021 The guide lens holder has been replaced with a two-part system that is more reliable. The assembly manual has been changed to reflect this (See step 21). UPDATE: 2 July 2020 Added f/8 collimator lens holder. UPDATE: 21 June 2020 The grating holder caps have a bit more thread. If you now screw them all the way in this will lock the grating holder in place buy. A general overview of the LOWSPEC Spectrometer (spectrograph). This is the first video of 3 and will cover printing the LOWSPEC on an Ender 3 printer

The key is it have a reflective slit plate which allows the slit gap to be seen (most of the time) against the sky background, and just position the target star in/on the gap and guide. AstroArt has a neat slit guiding routine. I also persuaded the guys at PHD2 to include a slit guiding option Our low cost Spectrometers have ATP2000 series ,is can be used in fluorescence, transmittance, reflectance, spectrophotometer. and biochemical analysis, they can be applied to lab, field, process and OEM application, etc Spectrometers BaySpec's SuperGamut™ series UV, Visible, Near-Infrared (NIR), and Short-Wave-Infrared (SWIR) spectrometers are designed to meet real-world challenges for best-in-class performance, long-term reliability, compact size and ultra-low power consumption

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  1. Two common categories of mass spectrometry are high resolution mass spectrometry (HRMS) and low resolution mass spectrometry (LRMS). Not all mass spectrometers simply measure molecular weights as whole numbers
  2. Our Triple Quad mass spectrometers revolutionize quantitation with higher sensitivity, speed, and performance, from low mass to high mass compounds, in positive or negative polarity and in a single injection. And that's just the beginning. We continue to invest in groundbreaking technologies, perpetually innovating efficiency, automation.
  3. Designed for accuracy and performance in a compact design the T6 Series of UV-Vis Spectrophotometers offer wavelength accuracy as low as +/- 1 nm combined with low stray light of less than 0.05%T. With a focus on reliability in a compact footprint, PERSEE's entry level Spectrometers set a Related Products: Uvvis Spectrophotometer
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Prizm range of specrometers by TestRight offers affordable and flexible spectrometers, with options of detection range from 200 to 1100 nm. It can be used in Absorbance, Transmittance, Reflectance, Irradiance, Color, Raman and Fluorescence measurements Surface sensitive spectroscopic methods, like Auger Electron Spectroscopy (AES), Low Energy Ion Scattering Spectroscopy (LEISS) and especially X-ray or UV excited Photoelectron Spectroscopy (XPS and UPS) became powerful tools to characterize the surface chemical composition, the chemical state of the surface electrons and the electronic properties of materials surfaces Fluorescence spectroscopy is primarily concerned with electronic and vibrational states. Generally, the species being examined has a ground electronic state (a low energy state) of interest, and an excited electronic state of higher energy. Within each of these electronic states there are various vibrational states

Spectrograph / Spectroscope (LOWSPEC) by PJHGerlach

Leverage the power of mass spectrometry. Thermo Scientific high resolution mass spectrometry systems take discovery and sample analysis to new heights. We offer easy, high-throughput, quantitative workflows for proteins, drug metabolites, pesticides and many other applications. Whether you're detecting disease biomarkers or performing. Three low resolution mass spectrometers (Agilent 5975C, 5973N and 5977B) with quadrupole analyzer coupled to three gas chromatographs (Agilent 7890A, 6890N and 7890B) respectively, for capillary columns with split / splitless injector. The ionization of the samples is carried out in electronic impact

I have a Low Spec 3D that I can't use right now. I built it last year and have used it successfully Mass Spectrometer Troubleshooting Angela Smith Henry, Ph.D. Applications Chemist CSD Supplies Division November 29, 2018 What to Check When Your Results Common ailments of Mass Spec • High background • Noisy background • Too many peaks! • Diminished peaks • Few or no peaks • Poor data quality (peak shape, etc. A Clinical Research Method for the Measurement of Low-Level Testosterone in Serum using Differential Mobility Separation with LC-MS/MS Identification and Quantification of Designer Drugs in Urine by LC-MS/MS The Quantitative Power of SCIEX Triple Quad and the QTRAP ® 6500+ LC- MS/MS System for the Bioanalysis of Biotherapeutic Mass spec costs don't have to be intimidating. You don't have to compromise quality data and insights. We have multiple paths to a low cost mass spectrometer The Advion ExpressIon CMS-L is a low resolution, compact, single-quadrupole mass spectrometer with a range up to 2000 m/z. ESI and APCI ion sources may be manually changed by users. Available inlets include Flow-Injection Analysis (FIA), PlateExpress TLC plate reader, and an Atmospheric pressure Solids Analysis Probe (ASAP)

LOWSPEC Spectrometer - Part 1 - 3D Printing - YouTub

The invention relates to a method for improving a low mass cutoff value of an ion trap mass spectrometer. A driving working power supply of an iron trap is a digital square wave power supply The SPECTROMAXx stationary metal analyzer is used mainly for material testing in foundries and for incoming and outgoing inspections in the metal industry around the world. It determines all of the elements used in the metal industry, including metal analysis of carbon, phosphorous, sulfur and nitrogen. The eighth generation of the SPECTROMAXx. Gamma Spectroscopy is the science (or art) of identification and/or quantification of radionuclides by analysis of the gamma-ray energy spectrum produced in a gamma-ray spectrometer. Learn more about this widely used technique in environmental radioactivity monitoring, nuclear medicine and radiopharmaceuticals, health physics personnel monitoring and more Mass spectrometry (MS) is an analytical technique that is used to measure the mass-to-charge ratio of ions.The results are typically presented as a mass spectrum, a plot of intensity as a function of the mass-to-charge ratio.Mass spectrometry is used in many different fields and is applied to pure samples as well as complex mixtures

The Lowspec spectrometer - DIY Astronomer - Stargazers Loung

Mass spectrometry (MS) is an analytical laboratory technique to separate the components of a sample by their mass and electrical charge. The instrument used in MS is called mass spectrometer. It produces a mass spectrum that plots the mass-to-charge (m/z) ratio of compounds in a mixture So Δ m = 1 The required resolution is: m Δ m = 1061 1 ≈ 1060: The spectrometer in (a) has only 1000 which is too low. The spectrometer in (b) has 5000 which is quite more than needed. Maybe it is easier to think of the reciprocal: Δ m m which tells you how far two signal need to be apart so your spectrometer can resolve them With low cost electronic components, it is possible to build a cost effective instrument for resource limited labs. The electronic components for a LED based spectrometer had a total cost of about US$ 20. Commercial instruments usually would cost more than US$ 1,000. In this respect, the LED based spectrometer was a very cost-effective in. As a result, on a high resolution mass spectrometer, 2-octanone, C 8 H 16 O, has a molecular weight of 128.12018 instead of 128. Naphthalene, C 10 H 8, has a molecular weight of 128.06264. Thus a high resolution mass spectrometer can supply an exact molecular formula for a compound because of the unique combination of masses that result

Instrument Details | Small Molecule Mass Spectrometry

Optical techniques play an important role as fast, low-cost alternatives or complements to isotope ratio mass spectrometry (IRMS) for stable isotope breath studies. This is clinically exploited with success in the 13 CO 2 / 12 CO 2 urea breath test (with NDIR or CRDS) for H. pylori diagnosis 8 and for evaluating the activity of drug. Exceptionally low ripple and noise and a comprehensive range of control options make these units key in pushing the boundaries of Mass Spectrometry precision. MSA Series 1— 3kV 0.9W PMT Series 0.5—7.5kV 1.9—4W MPD Series 2.5—20kV 10W General Purpose - Reversible Polarit developed an ASIC spectrometer designed speci cally to provide an essential building block for a space instrument that can address fundamental issues about the chemistry, evolution, and dynamics of planetary atmospheres. This spectrometer chip has been named SPLASH, for Single-chip Planetary Low-power ASIC Spectrometer with High-resolution Guidelines for Low Level Gamma Spectrometry - Air Filters, Water, and Soils Peak Width Calibration If a computer analysis is used to determine the specific activity of the sample, a peak width (and peak shape) calibration is necessary. The procedure is much the same as the energy calibration procedure and may be done simultaneously. Our integrated circuits and reference designs help you create innovative spectrometer solutions. Modern spectrometer systems often require: High-performance measurements in a portable, low-cost form factor. Optimized designs with DLP technology. Seamless creation and displaying of high-speed patter

OEM Spectrometer Systems At B&W Tek we have always been committed to providing the best system solution for your spectroscopy and laser needs. Since the company's establishment, we've emphasized strong vertical integration for better efficiency, faster growth and high quality products Mass spectrometers are comprised of three main components: an ion source, a mass analyzer, and a detector. Ionization of the analyte occurs in the ion source and the resulting ions are counted at the detector. However, it is the mass analyzer that is responsible for determing the mass-to-charge ratio (m/z) of the ions (Jennings KR, Dolnikowski.

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  1. Our T-SPEC series spectrometer is the perfect choice for broadband THz imaging. It allows scan of up to 25×25 mm sample with spatial resolution of approx. 1 mm. Measurements contain information about the target, revealing both structural and spectroscopic information. T-SPEC spectrometer can be adopted for optical pump THz probe measurements
  2. g Lower scan rates, mSec order and above Ti
  3. ation. This is the RNA absorbance, dwarfedby theconta
  4. Unrivaled utility and flexibility Most laboratories require the ability to analyze a range of samples using more than one technique for more complete identification and characterization of samples. The expression CMS integrates with nearly every chemistry technique from the simplest, fastest direct probe analysis requiring no sample preparation to ultra-high performance compound separation.
  5. Cleanliness Class: Class 10,000 Mass Spectrometry Laboratory. Temperature humidity control. Temperature setpoint: 20° C. Absolute temperature limits: ±5° C. Single point temperature stability: 0.1° C/hr., 0.25° C/24 hrs. Temperature Gradient - 1°C. in a plane 0.76m AFF to 2.53m AFF and within 0.46m of walls. Humidity: 45% RH ± 5% RH
  6. spectrometer to study gamma rays and their interactions with matter. You will: Take a pulse height spectrum for a monochromatic source and identify the photopeak, Compton edge, and backscat-ter peak associated with the photoelectric ff and Compton scattering. Measure the dead time of the spectrom-eter and learn how to use the live time correction
  7. Mass Spectrometry. The Mass Spectrometer is a useful machine to have in chemistry, as it allows much of the wet chemistry to be replaced by more accurate methods of analysis. It is important that a low pressure is maintained in the spectrometer so that the ions can pass through unhindered by molecules in the air

RforMassSpectrometry is a meta-package that is used to manage the R for Mass Spectrometry suite and core package versions in a coherent way. Users will rely on this package to install and manage the other packages. Learn more. A $500 DIY near-IR spectrometer that would sell for $10,000. DIYing spectrometers is not new. You can make one with your phone camera, and a broken piece from a CD-ROM as a diffraction grating. There are plenty of tutorials for this online. It takes $5 to make one Spectrometry Mark Fisher, Ph.D., D(ABMM) Assistant Professor of Pathology, University of Utah School of Medicine, - matrix signal problematic for low MW compounds (≤~700 Da) - laser may degrade photosensitive molecules - organic acid matrix may degrade some compound charge. A computer is used to control the mass spectrometer and for processing the data. • Compounds introduced into the spectrometer produce a characteristic mass spectrum which can be used to obtain identity or structural information. 2.1 Key components of a mass spectrometer • The key components of a mass spectrometer are shown in Figure 1 The Biomarker Mass Spectrometry Core in the Gillings School of Global Public Health has expertise in qualitative and quantitative analysis of a variety of low molecular weight biomarkers of exposure and effect. Examples of some of the analytes we measure include environmental toxicants, DNA adducts, short chain fatty acids, metabolites, amino.

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  1. mance of two different MS systems. Design evolution of mass spectrometry instru - mentation has resulted in very low noise systems that have made the comparison of performance based upon signal-to-noise increasingly difficult, and in some modes of operation impossible. This is especially true when using ultra-low noise modes suc
  2. Mass Spectrometry. 1. The Mass Spectrometer In order to measure the characteristics of individual molecules, a mass spectrometer converts them to ions so that they can be moved about and manipulated by external electric and magnetic fields. The three essential functions of a mass spectrometer, and the associated components, are: 1
  3. High-resolution mass spectrometry (HRMS) provides the highest possible precision of m / z measurement using different analyzers such as time of flight, Orbitrap [112], or Fourier transform ion cyclotron resonance. Standard resolution is usually at least 20 times higher than in low-resolution MS systems [95]

In this review we focus on low-cost small mass spectrometers designed for detection of analytes eluting from LC instruments. Fig. 1 and Table 1 −1. Microsaic applied their knowledge of microelectromechanical systems (MEMS) to develop the main components of their mass spectrometer, those being the nano-spray ESI source, vacuum interface and. low-resolution mass spectrometry When a molecule undergoes ionization by electronic impact in a mass spectrometer, the primary process is the abstraction of an electron to give a cation radical. This cation-radical is about the molecular ion and will have a greater or lesser tendency to fragment depending on its stability The Vernier Spectrometer is a truly portable device, measuring 10 cm x 9 cm x 3 cm. One-step calibration of the full spectrum saves precious lab time. A complete visible light spectrum, 380-950 nm, is collected in a fraction of a second. The open cuvette holder allows for access to the sample during testing Mass Spec Calibration Compounds and Spectra. Calibration Compounds are used by the mass spectrometer user to adjust the mass spec calibration scale as well as the relative intensities of mass spec peaks from low to high mass. This is particularily necessary for the setup of quadrupole mass spectrometers. The most popular calibration compound is.

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Expert Review of Proteomics, 2018 Affinity enrichment for mass spectrometry: improving the yield of low abundance biomarkers Introduction: Mass spectrometry (MS) is the premier tool for discovering novel disease-associated protein biomarkers. Unfortunately, when applied to complex body fluid samples, MS has poor sensitivity for the detection of low abundance biomarkers (≪10 ng/mL), derived. system to maintain the low pressure, which is also called high vacuum, required for operation. High vacuum minimizes ion-molecule reactions, scattering, and neutralization of the ions. In some experiments, the pressure in the source region or a part of the mass spectrometer is intentionally increased to study these ion-molecule reactions Mass spectrometry, often abbreviated to mass spec, is a technique used to accurately determine the mass of different molecules in a sample. A mass spectrometer is a device used to perform this measurement. The first mass spectrometer was built in 1912 by J.J. T. Originally called a parabola spectrograph, the device was used to provide. Triple Quad 6500+ LC-MS/MS system features multi-component IonDrive Technology that pushes the boundaries of quantitation. The sensitivity, speed, and performance delivered through these technology enhancements enable you to see it all, from low mass to high mass compounds

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  1. Tandem Mass Spectrometry or MS/MS. Block Diagram of a Mass Spectrometer Ion Source Detector High Vacuum Sample In Computer 400 600 800 1000 1200 1400 1600 1800m/z 0 20 40 60 80 100 Relative Abundance Tandem Mass Spectrometry or MS/MS. Block Diagram of a Mass Spectrometer Ion Source Detector High Vacuu
  2. Spectrometer. This is the design that is currently in widespread use for residual gas analysis. It is highly stable and has excellent mass resolution. With high sensitivity electron multipliers, it can measure partial pressures down to 10-14 Torr! The operation of the Quadrupole Mass Spectrometer (QMS) is not quite so simple t
  3. Mass spectrometry (MS) measures the mass (m) to charge (z) ratio—m/z—of the ions in a sample.Those ratios provide an atomic signature for what makes up a sample. In many situations, z = 1, so the ratio provides the mass of the ions. In original instruments, the mass could only be measured to single-digit units, or integers
  4. The heart of a mass spectrometer is the mass analyzer, which differentiates analytes based on their mass-to-charge ratios (m/z). Numerous figures of merit are used to describe the performance of a mass analyzer, including scan speed, mass range, linear dynamic range, sensitivity, mass accuracy, mass resolving power and mass resolution

StellarNet UV Spectrometer, range 200 - 600nm, with 10um slit installed and 1200 g/mm holographic grating with 0.4 nm resolution. Optics available in either BLUE-Wave advanced miniature or GREEN-Wave low cost portable spectrometer platforms Why Does Mass Spec Require High Vacuum? Ions are created in the ion source. However, they may collide with many types of gas, such as carrier gas (He) and residual gas (air, water etc.), on the way to the detector to be unfortunately removed. This collision may happen in a short time with a low vacuum Mass Spectrometry is used for many analytical purposes including: Measure the physical, chemical, or biological properties of a great variety of compounds. In analytical laboratories, the most common applications involving a mass spectrometer are Pharmaceutical, Biopharma, Drug screening, Environmental testing, Food & beverage testing. molecules at low concentration and not detecting them due to the masking effect of isobaric matrix interferences (see Figure 1). Definitions In mass spectrometry, four terms—mass resolving power, mass resolution, mass accuracy, and mass precision—are used to characterize the performance of high-resolution, accurate-mass (HRAM) mass. SuperSpec is a novel, ultra-compact spectrometer-on-a-chip for (sub)millimeter-wavelength astronomy [4]. Its very small size, wide spectral bandwidth, and highly multiplexed detector readout will enable construction of powerful multi-beam spec-trometers for high-redshift observations. We are currently developing this technolog

Mass spec instruments often include several cords, wires, and tubes for the process of separating and testing the molecular makeup of a sample. OnePointe Solutions can include custom tubing and wire cutouts for easy organization and management of electrical cords and tubes. Vacuum Pump Enclosure & Vibration Rack Inductively Coupled Plasma Mass Spectrometry or ICP-MS is an analytical technique used for element determination. It combines a high temperature ICP (Inductively Coupled Plasma) source with a mass spectrometer .The GAOS MS mass spectrometers provide fast, accurate and comprehensive gas analysis in real time Mass Spectrometry Detectors, A/D, Signal-to-Noise MS Interpretation CHEM-5181 Prof. Jose L. Jimenez High Vacuum Sample Inlet Ion Source Mass Analyzer Detector Recorder Lectures Why is Mass Spectrometry so Succesful? Aka, what must we have or we are doomed? Because of its:Because of its: A. High Sensitivity - ability to detect very small amounts Higher throughput mass spectrometry is essential to handle the overwhelming increase in test volumes currently being seen in a variety of clinical, forensic and toxicology applications. Automation can alleviate the major bottleneck in mass spectrometry workflows - manual sample preparation. Our in-depth understanding of our customers' needs. This article reviews mass spectrometry methods in forensic toxicology for the identification and quantification of drugs of abuse in biological fluids, tissues, and synthetic samples, focusing on the methodologies most commonly used; it also discusses new methodologies in screening and target forensic analyses, as well as the evolution of instrumentation in mass spectrometry

Optosky is a manufacturer with many sorts of Raman & spectrometer The Desktop Spectrometry Starter Kit (now at version 3.0) is our most recent reference design i... Public Lab is an open community which collaboratively develops accessible, open source, Do-It-Yourself technologies for investigating local environmental health and justice issues Comparison of several spray chambers operating at very low liquid flow rates in inductively coupled plasma atomic emission spectrometry Todolí JL, Canals A (1999) J Anal At Spec- drop size distribution. trom 14:61-68 19. B'Hymer C, Sutton KL, Caruso J (1998) J Anal At Spectrom 13:855-858 Acknowledgement The authors wish to thank Mr. The low-resolution spectrometer (LRS) on IRAS operated in parallel with the other detectors during the entire mission. The spectrometer had short-wavelength (7.7-13.4 microns) and long-wavelength (11.0-22.6 microns) bands, with spectral resolution varying from 20 to 60. A second file distributed with the catalog includes a table relating.

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PRIZM SPEC Spectrometer - TestRigh

  1. Using a mass spectrometer, we will ionize an analyte and then Detect it (the details of this will not be covered here). In one typical example, the molecule is bombarded with high energy Electrons, that cause an electron to be ejected from the analyte. (called electron impact mass spec) In mass spec, we can only detect charged specie
  2. Mass spectrometry (MS)-based proteomics has become a powerful technology for the identification and quantification of thousands of proteins. However, the coverage of complete proteomes is still very challenging due to the limited speed, sensitivity and resolution of current mass spectrometers. using low sample amounts. timsTOF Pro powered.
  3. Easy to use, powerful, compact and robust - Spectrum Two<sup>™</sup> is the FT-IR spectrometer of choice for everyone, everywhere. With fully integrated, robust universal sampling for trouble-free measurements and portability options, Spectrum Two is ideal for use in both laboratory and remote testing environments. Ideally suited to everyday analysis, you can confidently perform fast.
  4. The DR6000™ is the industry's most advanced laboratory spectrophotometer for water testing. It offers high-speed wavelength scanning across the UV and Visible Spectrum, and comes with over 250 pre-programmed methods including the most common water and environmental testing methods used today
  5. The compact UV-2600i (UV-2700i) is a mid-range UV spectrophotometer that can be used in a wide array of fields, and easily expanded to suit your analysis goals. The included Shimadzu LabSolutions UV-Vis software is simple to use and can ensure data integrity. The UV-2600i is a single monochromator system, whose wavelength range can easily be expanded to the near-infrared region of 1400 nm.
  6. o System - GammaSpec_ENG - 3/09/2015- Page 4 Radionuclides Gamma Spectrometry Theory Gamma-ray spectroscopy is the quantitative study of the energy spectra of gamma-ray sources, in such as the nuclear industry, geochemical investigation, and astrophysics
  7. g in from startups as well as.
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The mass spectrometer - and friends! Pesticides in general are found at very low levels in essential oils. Most GC-FID or GC-MS techniques used to establish the composition of an oil will stop at most at 0.01-0.05% of sample. In practice, compounds accounting for more than this proportion of the sample can still be neglected, due to. The SPECTROTEST is a mobile arc spark spectrometer ideal for many applications in the metal producing, processing, and recycling industries. This mobile metal analyzer flaunts its superior performance especially when exact metal analysis is required, when materials are difficult to identify or when there is a large number of samples to be tested Liquid Chromatography Tandem Mass Spectrometry. During the past 15 years, liquid chromatography tandem mass spectrometry (LC-MS/MS) has evolved into a vital technology used to perform routine tests in many clinical laboratories. Historically, LC-MS/MS had been used primarily by research, pharmaceutical, or commercial laboratories; however. Spectrometry. Spectrometry is the method used for the study of certain spectrums. Ion-mobility spectrometry, mass spectrometry, Rutherford backscattering spectrometry, and neutron triple axis spectrometry are the main forms of spectrometry. In these cases, a spectrum does not necessarily mean a plot of intensity versus frequency Mass Spectrometry is a process which determines the atomic mass of the atoms or molecules. It can be used to measure relative isotopic concentration, atomic and molecular mass, and the compound structure. The product of a Mass Spectrometry is a graph that plots mass against relative abundance per charge

Examples of application areas are drug discovery, synthetic reaction monitoring, nano-particle characterization, etc. Also, analysis can be with or without chromatographic separation, in low or high resolution. For spatial resolution, imaging by mass spectrometry is also performed on synthetic surfaces Realizing this level of performance with quadrupole mass spectrometry has shown to be an effective addition to high-resolution analysis. Product Benefits: High resolution >4000 (M/ΔM-FWHM) High resolution can be achieved when scanning the total mass range. Rapid, high-resolution scans The Massbox is the first commercial Laser Ablation Laser Ionization Time of Flight Mass Spectrometer (LALI-TOF-MS). Because it combines low detection limits with low-cost, uncomplicated operations, it simplifies solid sample analysis for any application requiring trace-level quantitation

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A bench top, raman spectrometer constructed from very easy to source components and 3D parts printable on even entry level printers. My system is a completely unique innovative design in the world of raman spectroscopy and has many advantages beyond the fact it can be constructed for a tiny fraction of the cost of a used commercial system, which can cost tens of thousands of dollars The LTQ-Orbitrap hybrid mass spectrometer is a high mass accuracy, high resolution mass analyzer, capable of achieving resolving power > 100,000 and having mass accuracy ≤ 5 ppm (Makarov et al., 2006). Employing a simple lock-mass scheme can reduce mass errors to less than 2 ppm (Olsen et al., 2005). The higher-energy C-trap.

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low-duty cycle lasers can result in nonlinear optical phenomena that complicate the measured spectra and confound spectral interpretations. Low-UV-resonance Raman spectral S/N also results from the generally low throughputs of existing deep UV Raman spectrometers. To improve UV Raman S/N, we have built Quadrupole time-of-flight (QTOF) MS has revolutionized how we identify and quantify complex mixtures and unknown compounds, in fields ranging from biological and pharmaceutical research to clinical toxicology. Our ultra-high resolution QTOF and LC-QTOF instruments are at the leading-edge of this technology use a low mass autotune. This is an autotune using m/z 69, 131, and 219, rather than m/z 69, 219, and 502. The shorter linear range offers an increase in sensitivity for low molecular weight compounds. 1. From the top menu bar of the Instrument Control screen, click VIEW, then TUNE AND VACUUM CONTROL, the screen changes to TUNE. 2 mass spectrometry (FTMS) [5] and plasma desorption mass spectrometry (PDMS) [6], whose potential in surface analy- sis was recently demonstrated with an information depth of a few monolayers. Scope of available methods for inorganic mass spec trome try The spark source mass spectrometer is the archetype instru