gc ms Articles

225 Results found

Extraction & Analysis of PAHs in Olive Oil Using SupelMIP SPE – PAHs and GC-MS

by Sigma-Aldrich/Supelco  (Sep. 5, 2013)

Polyaromatic hydrocarbons (PAHs) consist of fused aromatic rings and are formed as a by-product during the combustion of fuels. Seven PAHs in particular are known for their carcinogenic properties: benz[a]anthracene, benzo[a]pyrene, benzo[b]fluoranthene, benzo[k]fluoranthene, chrysene, dibenz[a,h]anthracene, and indeno[1,2,3-cd]pyrene. As such, ...

GC-MS Analysis of Polychlorinated Dibenzodioxins and Polychlorinated Dibenzofurans

by Sigma-Aldrich/Supelco  (Jun. 5, 2012)

Polychlorinated dibenzodioxins (PCDDs) and polychlorinated dibenzofurans (PCDFs) consist of 210 different compounds with varying degrees of toxicity, and the 17 congeners with chlorine substitution in the 2,3,7,8 positions are considered the most toxic. This chromatogram illustrates the separation of a 17 component 2,3,7,8-substituted PCDD and ...

US EPA Method 625 Semivolatiles by GC-MS on the Supelco SLB™-5ms

by Sigma-Aldrich/Supelco  (May 11, 2012)

  Application Report 473: US EPA Method 625 describes the procedure for the analysis of industrial and municipal waste water samples by GC-MS. This analysis illustrates the separation of the single-peak base-neutral and acid compounds listed in the method, along with commonly used surrogates and internal standards. ...

Analysis of Organophosphorus Pesticides in Baby Foods Using a Triple-Quadrupole GC/MS/MS System

by Shimadzu Scientific Instruments Inc  (Nov. 1, 2013)

Contamination of food products with pesticides is a growing concern because of recognized adverse health effects, increasing world-wide usage of pesticides, and increasing imports of raw foodstuffs from foreign sources. The concern is particularly acute for baby foods because of the high vulnerability of babies to adverse health effects from ...

Analysis of PBDEs in Sediment Using GC-MS/MS

by Shimadzu Scientific Instruments Inc  (Nov. 19, 2012)

Polybrominated diphenyl ethers (PBDEs) are brominated flame retardants (BFRs) widely used in plastics. Due to their toxicity and persistence, their industrial production is to be eliminated under the Stockholm Convention. Contamination from PBDEs is widespread in the environment, including in sediments. In order to determine PBDEs in sediments, ...

GC/MS-SIM-An option for lower detection limits

by Curtis & Tompkins Laboratories  (Jul. 16, 2013)

Select Ion Monitoring mode (GC/MS-SIM) is a technique used to perform low level GC/MS measurements of organic compounds. GC/MS-SIM can reduce reporting limits 10-100 fold and can minimize the effects of matrix interferences.                                   ...

US EPA Method OLM04.2 SVOA (CLP Semivolatiles) by GC-MS on the Supelco SLB™-5ms

by Sigma-Aldrich/Supelco  (May 6, 2012)

Application Report 478 US EPA Method OLM04.2 SVOA (CLP Semivolatiles) by GC-MS on the Supelco SLB™-5ms The Contract Laboratory Program (CLP) is a nationwide network consisting of testing laboratories, contractors, and EPA employees. Its primary function is to provide analytical data in support of EPA’s Superfund program. To ensure the ...

Analysis of PCBs and Organochlorinated pesticides in river water using simultaneous Scan/MRM measurement in GC-MS/MS

by Shimadzu Scientific Instruments Inc  (Nov. 1, 2013)

PCBs and some chlorinated pesticides are resistant to decomposition in the environment, and tend to accumulate in living organisms. As a result, they are designated as POPs (Persistent Organic Pollutants) under the Stockholm Convention. In monitoring these environmental pollutants in river water and sludge, sensitivity for the detection of trace ...

U.S. EPA volatile organics method 524.2 using PURGE and TRAP GC/MS

by PerkinElmer, Inc.  (Oct. 28, 2011)

Clean drinking water is of worldwide interest. Contaminants can compromise the quality of a water supply and cause short- and long-term health effects. Stringent water quality criteria help to ensure safe drinking water by requiring the detection and quantification of a wide variety of contaminants at extremely low levels. U.S. EPA Method 524.2 ...

Analysis of Organophosphorus and Organonitrogen herbicides in water using GC/MS with selected ion recording

by PerkinElmer, Inc.  (Oct. 28, 2011)

Laboratories monitoring trace level pesticides and herbicides by gas chromatography/mass spectrometry (GC/MS) frequently utilize Selected Ion Recording (SIR) techniques to maximize analytical sensitivity for quantification. With analytical standards, precision is limited to a large extent only by the autosampler and other instrumental effects. ...

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