gc-ms Articles

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GC-MS/MS Analysis of Pesticides in Drinking Water

by Shimadzu Scientific Instruments Inc  (Oct. 2, 2014)

According to Japan’s list of drinking water quality control substances, pesticides are included as supplemental items subject to analysis. Designed to complement the standards, the Ministry of Health, Labour and Welfare encourages water utilities to monitor pesticide levels and achieve specified targets. Among the 102 listed pesticides, 84 ...

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.                                   ...

airmoTWA: New Expert System for GC-FID/MS

by Chromatotec Group  (May 1, 2014)

Chromatotec has developed the first TRAP-GC-FID/MS designed for continuous monitoring of Volatile Organic Compounds (VOCs), inorganic molecules and permanent gases. In addition to the mass spectrometer (MS), this system encompasses the same trap, thermo desorption and separation technologies as airmoVOC analyzers (current mCERTS approved GCs ...

Analysis of Opioids Using Isotope Dilution with GCMS-TQ8030 GC/MS/MS

by Shimadzu Scientific Instruments Inc  (Jul. 2, 2014)

Development of methods for analysis of drugs of abuse has become a high priority for both forensic toxicology and law enforcement. The large numbers of individual drugs and new "designer drugs" has made method development for these compounds a significant undertaking. Gas chromatography mass spectrometry (GCMS) has been used extensively for ...

GC-MS Analysis Agricultural Pesticides on the SLB-5ms

by Sigma-Aldrich Co., LLC  (Dec. 31, 2006)

This application illustrates the analysis of 29 different agricultural pesticides of different classifications and functionalities, using the SLB-5ms, 30 m x 0.25 mm I.D., 0.25 μm  The analysis was done by GC-MS using selected ion monitoring (SIM) to allow detection of all compounds at 100 µg/L. The standard solution was made in ...

GC-MS Analysis of Polychlorinated Dibenzodioxins and Polychlorinated Dibenzofurans

by Sigma-Aldrich Co., LLC  (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 ...

The extraction and quantification of limonene from citrus rinds using GC/MS

by PerkinElmer, Inc.  (Oct. 28, 2009)

D-Limonene, shown in Figure 1, is a common naturally occurring compound with a citrus scent. It is often used as an additive in food products and fragrances, and is classified by the U.S. Food and Drug Administration (FDA) as Generally Recognized as Safe (GRAS)1. It has also been approved by the U.S. Environmental Protection Agency (EPA) for usage ...

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

by Sigma-Aldrich Co., LLC  (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. ...

Solid Phase Microextraction of Organophosphate Insecticides and Analysis by Capillary GC/MS

by Sigma-Aldrich Co., LLC  (Dec. 31, 1999)

SPME was used to extract an aquatic sample for analysis of organophosphate insecticides by gas chromatography/mass spectrometry (GC/MS).  An SPME fiber coated with 8.5um of polyacryate yielded detection limits ranging from 0.10 to 0.56ug/L. SPME is a quick and highly sensitive sample preparation technique that eliminates the use of solvents. ...

Enhanced separation of hop oils by flow-modulated GC×GC–TOF MS with Tandem Ionisation

by SepSolve Analytical  (Jul. 29, 2016)

Beer contains hundreds of organic ingredients, with concentrations spanning many orders of magnitude, and including monoterpenes (C10) and sesquiterpenes (C15). These are aroma-active hydrocarbons found in the essential oils of various plants, including hops, and provide much of the characteristic ‘bitterness’ of the finished beer. Of ...

GC/MS analysis of a complex sample in DCM using hydrogen carrier gas

by Peak Scientific Instruments Ltd  (Jul. 2, 2014)

Labs worldwide have recently found that helium has been in short supply, leaving a number of labs without carrier gas. Added to this, helium prices have doubled over the past 10 years causing a number of labs to look into alternative carrier gases for GC, such as nitrogen and hydrogen. As well as lower price and unlimited availability, hydrogen ...

US EPA Method 525.2 Semivolatiles by GC-MS on the Supelco SLB™-5ms

by Sigma-Aldrich Co., LLC  (Dec. 31, 2008)

US EPA Method 525.2 describes the procedure for the extraction and analysis of semivolatile organic compounds from drinking and source water. The compound list includes polynuclear aromatics, phthalates, pesticides, and polychlorinated biphenyls.  This application illustrates the separation of a majority of the single peak analytes listed in ...

Analysis of Multi-Pesticide Residues in Vegetables, Food, and Fruits by SPE/GC-MS

by Sigma-Aldrich Co., LLC  (Jan. 18, 2012)

Cleanup of matrices is the first, the most important, and the most critical step for both broad-spectrum screening and accurate determination of pesticides and their metabolites in vegetables,meats, drinks and fruits. In most cases, solid phase extraction (SPE) methods are used to clean up the extracts before the GC-MS analysis. The ideal SPE ...

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 Pesticides in Baby Foods Using a GCMS-TQ8030 GC/MS/MS, Part II

by Shimadzu Scientific Instruments Inc  (Jul. 2, 2014)

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 health effects from synthetic ...

Comprehensive analysis of tobacco smoke using TD–GC×GC–TOF MS with Tandem Ionisation

by SepSolve Analytical  (Jul. 29, 2016)

The hazardous constituents of cigarette smoke have attracted considerable attention lately, especially with increasing regulation around the world limiting or banning smoking in public places – and even in private cars if children are present. From an analytical perspective, however, there is much that remains to be learnt about the ...

Meeting the expanding needs of global food testing: Analysis of pesticides in vegetable matrix using triple quadrupole GC-MS/MS

by Bruker Corporation  (Nov. 1, 2011)

Globally ensuring the reliability of food onour table with food testing solutions. Globalization of food supplies has renderedfood testing a major challenge for manufacturersand other businesses; contamination and spoilingincidents have fuelled media coverage, as well asraising consumer concerns. Government andregulatory agencies such as 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 ...

Impact of pH on Derivatization of Nitrophenol Compounds

by Restek Corporation  (Aug. 3, 2016)

Our goal of evaluating the Normalized French Environmental Method 12673 required testing the method’s ability to derivatize nitrophenols and alkylphenols in addition to the chlorophenols the method was designed for. Unfortunately, nitrophenols proved challenging to derivatize at low concentrations. In an effort to improve the derivatization ...

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