accurate mass

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accurate mass

The mass of an ion of specified isotopic composition, which is calculated by summing the exact masses of the constituent atoms. The empirical formula of an ion can be deduced from the measured accurate mass of the ion if the ion mass is low enough to limit the number of formulaic possibilities and if the exact mass value is accurately known.
References in periodicals archive ?
The Japanese National Police Agency has Selected Bruker's micrOTOF[TM]-II ESI-TOF Mass Spectrometers for Exact Mass Analysis at its Forensic Laboratories
The APGC source is unique in that it allows scientists to make exact mass LC/MS/MS and GC/MS/MS measurements on one Xevo TQ-S Mass Spectrometer eliminating the need to dedicate a mass spectrometer for LC/MS/MS work and another to GC/MS/MS work.
In contrast, researchers can detect the exact mass and size of extrasolar planets observed in transit across their stars, as HAT-P-1b'S were.
micrOTOF[TM] II is a new ESI-TOF system now with further enhanced mass spectrometry performance and a novel, optional LC and GC-APCI Interface expanding its capabilities to measure the exact mass of polar, macromolecular, semi-volatile and volatile compounds using one single, cost-effective LC-MS and GC-MS platform.
Game-Changing Technology with High Definition MS (HDMS) Defines New Levels of Performance for Exact Mass MS and MS/MS and Opens New Frontiers in Scientific Discovery
Whereas the wobble method permits them to infer only the minimum mass of a planet, transits reveal its exact mass and radius.
Featuring intelligent instrument control and the ability to acquire nominal mass, exact mass, MS/MS and exact mass MS/MS data, MassLynx Software offers the versatility required in today's labs.
The unit, thanks to the exact mass accuracy, high linear dynamic range and high scanning speed while maintaining high resolution, allows a better identification of molecules with nearly identical molecular weight.
12 /PRNewswire-FirstCall/ -- Waters Corporation today introduced its Waters(R) Xevo(TM) quadrupole time-of-flight (QTof) mass spectrometer (MS), an exact mass MS/MS benchtop instrument that is the most sensitive benchtop QTof system ever.
Astronomers have determined the exact mass of one other extrasolar planet (SN: 11/20/99, p.
The Waters LCT Premier(TM) is the company's newest high-end, benchtop, time-of-flight mass spectrometer and is designed for routine, automated exact mass measurements for the identification of compounds.
Improved hardware performance, newly upgraded software features, and exact mass databases will provide immediate value for laboratories working in a variety of complex applications, such as food safety, environmental, designer drugs, doping and metabolomics research.