GC-MS Articles
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GC/MS-SIM-An option for lower detection limits
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. ...
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http://saranalaboratorium.com/scion-instruments-application-note/
A method for analysis of 258 pesticides has been developed on Scion TQ triple quadrupole mass spectrometer. The method setup is streamlined with the new software approach of Compound Based Scanning (CBS). The matrix-matched calibration results have demonstrated good sensitivity, linearity and precision of Scion TQ. This application note describes a GC-MS/MS method for detection of 258 ...
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CTI Beijing Lab - Case Study
CTI is the largest commercial lab in China and Nutech is their exclusive preconcentration system supplier since 2021. CTI lab in Beijing is using Nutech preconcentation system to couple with Shimadzu GC/MS. ...
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Chlorination by-products of fenitrothion
The mutagens produced through chemical reaction between chlorine and the insecticide fenitrothion were studied by using a quadrupole GC-MS. The mutagenicity and the mutagen formation potential (MFP) of the identified by-products were evaluated by the Ames assay (preincubation method) using Salmonella typhimurium TA100 without exogenous activation by S9 mix (TA100-S9). Before conducting GC/MS ...
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Determination of Organochlorine Pesticides and Polychlorinated Biphenyls Using GC/MS/MS Operated in the MRM Mode
This paper describes use of a triple quadrupole GC/MS/MS method using Multiple Reaction Monitoring (MRM) mode for sensitive and selective detection and quantitation of Organochlorine pesticides and PCBs. A database with optimized MRM transitions for all of the OCPs and PCBs, including relative retention times for all components, makes method setup possible within minutes. The use of GC/MS/MS MRM ...
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Meeting the Korean Method ES 04601.2 for 1,4-Dioxane with Static Headspace GC/MS
Introduction The Korean Method ES 04601.2 requires static headspace with GC/MS to monitor 1,4-dioxane. The Minimum Quantitation Limit (MQL) must be less than 1 ppb. The method requires the calibration curve to have a correlation coefficient greater than 0.98, or a relative standard deviation of the response factors less than 25%. The Teledyne Tekmar HT3 Automated Static and Dynamic Headspace Vial ...
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Analysis of PBDEs in Sediment Using GC-MS/MS
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, they need to be separated from a large amount of ...
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GC-MS analysis of phthalate esters using hydrogen carrier gas
From July 22nd 2019, RoHS3 (directive 2015/863) added an update to the list of Phthalate esters included in the list of regulated substances. GC-MS is now the standard method for analysis of Phthalate esters. Abstract As helium increases in price and availability begins to affect supply of gas to laboratories, alternative carrier gases for GC-MS analysis are increasingly being adopted. An ...
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Analysis of Aroclor and Organochlorine Pesticides in Ground Water using Triple Quadrupole GC-MS/MS
USEPA method 608 is a GC-ECD method to determine Aroclor and organochlorine pesticides. This method requires the use of second column for confirming the detected compounds due to the low selectivity of the ECD detector compared with GC-MS/MS. Also pattern recognition is required for accurate identification of Aroclors. A triple quadrupole GC-MS/MS based method offers a solution for the GC-ECD ...
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Meeting the Korean Method ES 04602.1b for Vinyl Chloride, Acrylonitrile, and Bromoform with Static and Dynamic Headspace GC/MS
Introduction The Korean Method ES 04602.1b requires either static or dynamic headspace with GC/MS to monitor vinyl chloride, acrylonitrile, and bromoform. The Minimum Quantitation Limit (MQL) must be less than 5 ppb. The method requires the calibration curve to have a correlation coefficient greater than 0.98 or a Relative Standard Deviation (RSD) of the Response factors (Rf) less than 25%. The ...
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Analysis of Organophosphorus Pesticides in Baby Foods Using a Triple-Quadrupole GC/MS/MS System
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 synthetic chemicals, particularly pesticides. ...
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Meeting the Korean Method ES 04607.1 for Naphthalene with Static and Dynamic Headspace GC/MS
Introduction The Korean Standard Method for Drinking Water ES 04607.1 requires static headspace with GC/MS to monitor naphthalene. The Minimum Quantitation Limit (MQL) must be less than 3 ppb. The method requires the calibration curve to have a correlation coefficient greater than 0.98 or a Relative Standard Deviation (RSD) of the Response factors (Rf) less than 25%. The Teledyne Tekmar HT3 ...
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Complex Mixture Using Hydrogen as a Carrier Gas
The following technical brief aims to demonstrate the performance of GC-MS using hydrogen as a carrier gas. Here we compare the performance of hydrogen and helium for the analysis of a complex mixture. The results show that by using hydrogen, chromatographers can achieve superior results to helium, with faster run times and taller, sharper peaks. ...
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GC-MS/MS Analysis of Pesticides in Drinking Water
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 are simultaneously analyzed using solid-phase ...
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Improved Determination of Volatile Organic Compounds in Water by SPME and GC/MS: ISO Standard 17943
The analysis of water for volatile organic compounds is important due to their toxicity. The current methods for this determination lack of sensitivity, selectivity or capability for automation. This paper presents the new ISO 17943 Standard using Solid Phase Microextraction (SPME) and GC/MS. The sample preparation by SPME enables low limits of detection and easy automation of the whole method. ...
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US EPA Method 524.3 with the Tekmar Lumin P & T Concentrator and Thermo Scientific TRACE 1310 GC and ISQ LT MS System
Abstract US EPA Method 524.3 is used primarily by environmental labs for the analysis of volatile organic compounds (VOCs) in drinking water. While this method is effective at concentrating the trace levels of VOCs sometimes found in finished drinking water, it also tends to transfer significant quantities of water vapor to the gas chromatography-mass spectrometry (GC-MS) instruments. Teledyne ...
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Determination of PBDEs in Sediment Samples using the SpeedExtractor E-914
Polybrominated diphenyl ethers (PBDEs) are flame retardants used in a myriad of applications and are monitored worldwide because of health concerns. In this application, PBDE congeners were extracted from two sediment samples (certified sample and sediment core from Lake Maggiore) according to EPA method 3545A using the SpeedExtractor E-914 and determined by GC-MS/GC-ECD. The results were ...
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US EPA Method 8260 with the Tekmar Lumin P&T Concentrator and Thermo Scientific TRACE 1310 GC and ISQ MS
Abstract US EPA Method 8260 is used primarily by environmental labs for the analysis of volatile organic compounds (VOCs) in soils and water. While this method is effective at concentrating the trace levels of VOCs sometimes found in water and wet soils, it also tends to transfer significant quantities of water vapor to gas chromatographymass spectrometry instruments (GC-MS). To reduce the ...
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US EPA Method 624 with the Tekmar Lumin and the Agilent 7890B GC / 5977A MS
Abstract US EPA Method 624 is used primarily by environmental labs for the analysis of Volatile Organic Compounds (VOCs) in wastewater. While this method is effective at concentrating the trace levels of VOCs sometimes found in water, it also tends to transfer significant quantities of water vapor to Gas Chromatograph/Mass Spectrometer (GC/MS) instruments. To reduce the amount of water ...
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Metals and organic pollutants in snow surrounding an iron factory
Abstract To estimate air pollution snow samples were collected in March 2001 at six sites in the vicinity of the Kostomuksha factory in Karelia. Seventy-two chemical elements and more than 200 individual organic compounds were identified by inductively coupled plasma mass spectrometry (ICP-MS) and gas chromatography mass spectrometry (GC-MS). It was found that the levels of Li, B, Al, Fe, Ni, Cu, ...
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