Mass spectrometer manufacturers

Mass spectrometer Manufacturers Unit cost, X 10" World market, X 10"... 

The quality of data recorded from weak, high-mass-ion beams can usually be improved by the use of signal averaging. The computer software necessary is now available from the mass spectrometer manufacturers. Although signal averaging has not yet been applied to high-mass-carbohy-... 

Methods for pretreatment of samples for 13C analysis had been described in Chen et al. (2002a). After pretreatment, soil samples and plant debris were sent to the State Key Laboratory of Loess and Quaternary Geology, Chinese Academy of Sciences (CAS), for 13C analyses. The 13C analyses were conducted using a Finnigan MAT-251 mass spectrometer manufactured by Finnigan-Mat Company, with a precision of 0.2%o. Results are reported as 513C, in parts per thousand of the 13C/12C ratio from that of the International Pee Dee belemnite (PDB) standard, where ... 

Metabolynx is a spectral and chromatographic software program associated with Masslynx and developed by Micromass/Waters [29]. Most mass spectrometer manufacturers have similar software. It was specifically designed for... 

All major mass spectrometer manufacturers produce suitable instruments for steroid analyses. Typical instruments used in steroid assays are the Applied Biosystems API 2000-5000 series (www.appliedbiosytems.com), the Finnigan TSQ quantum (www. thermo.com), Agilent QQQ or QTof instruments (www.Agilent.com), and Micromass Quattro instruments (www.waters.com). 

There are several mass spectrometer manufacturers which have begun to offer commercial, fully computerized ms/ms instruments (16). These instruments are capable of generating and searching... 

A photograph of the triple quadrupole mass spectrometer manufactured by GG Organic Inc. is shown in figure 5. 

The Triple Quadrupole Mass Spectrometer Manufactured by VG Instruments... 

Most practitioners use carbon microneedle emitters, and a few others use silicon emitters. Silicon emitters can be manufactured more rapidly, but carbon emitters are more rugged and can be heated to much higher temperatures (for flash cleaning). Other types of emitters (bare wire, metal microneedles, metal tip, razor blade, or volcano) are only sparingly used. Users either make their own emitters (with commercial or home-built devices) or else purchase them (from mass spectrometer manufacturers or independent vendors). The choice of making or buying emitters usually comes down to cost and time. 

Most mass spectrometer manufacturers distribute a selfdevelopment kit (SDK) to access the data in the data files they support (e.g., Xcalibur SDK from Thermo, Analyst Scripting from Sciex). See the mass spectrometer manufacturer about these SDKs. 

Although the basic principle of mass spectrometry (MS) was discovered as early as 1910 by Sir J. J. Thomson, it was not untU the end of World War II that MS was first developed for analyses of gas and hydrocarbon mixtures [1], Almost all of the mass spectrometers at that time were made by researchers or specialists. The first commercial mass spectrometer manufactured by Consolidated Engineering Corporation (CEC) was delivered to the Atlantic Refining Company in 1946 for analysis of hydrocarbon fractions in gasoline boiling range [2]. Since then, the petroleum industry has pioneered the use of MS in chemical research. Many advances in MS were driven by the needs of the petroleum industry for analyzing components in complex mixtures. 

One difficulty was that the apparatus, simple to a physicist, appeared very complex to a chemist. The application of mass spectrometry of chemistry had to await the commercial production of instruments. The impetus came in the 1940s when the war effort demanded rapid and accurate hydrocarbon analysis in connection with aviation fuels. The next big step came in the 1950s when it was realized that in addition to quantitative analysis the technique could be used for the qualitative (structural) analysis of organic compounds. A certain resistance had to be overcome to induce mass spectrometrists to put dirty compounds into their instruments rather than clean hydrocarbons. This gave mass spectrometer manufacturers a further impetus to develop more and more advanced instruments and led to a new discipline - organic mass spectrometry. 

The JCAMP-DX protocol for MS was also based on the draft generic version 5.0 JCAMP-DX. It was completed and published after the committee of representatives of mass spectrometer manufacturers who had been working under the... 

It is unwise to buy a mass spectrometer before testing it All mass spectrometer manufacturers welcome potential buyers to try products before they buy them. It is imperative when testing a device to supply appropriate samples, standard solutes, and matrix extracts doped with analytes because results among standard solutions and matrix extracts may differ significantly. It is essential to create conditions as close as possible to those where the equipment will be used. Sample preparation is not the manufacturer s task. Sales representatives are not always equipped for or knowledgeable about sample preparation. 

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