Gc-Ms Column Articles on Environmental XPRT

GC-MS Analysis of Polychlorinated Dibenzodioxins and Polychlorinated Dibenzofurans

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 PCDF standard on a 30 m x 0.25 mm I.D. x 0.25 μm ...

Jun. 5, 2012

By MilliporeSigma

Target GC-MS Analysis using Accelerated Column Heating and Interactive Deconvolution Software

In diverse fields ranging from environmental samples to complex fl avor preparations, high performance, high resolution capillary gas chromatography/mass spectrometry, GC-MS, has become the preferred technique for identifying and quantifying target compounds at trace levels. Many of these samples are characterized by very complex matrices, which provide a substantial challenge for contemporary ...

Nov. 1, 2007

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

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 this method, using a SLB-5ms, 30 m x 0.25 mm I.D., ...

Dec. 31, 2008

By MilliporeSigma

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

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 composition of cigarette smoke, because of its high degree ...

Jul. 29, 2016

By SepSolve Analytical

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

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 the greatest importance for beer is the ...

Jul. 29, 2016

By SepSolve Analytical

Capillary GC Columns for Analysis of BTEX Hydrocarbons

A number of different stationary phases have been used for analyzing benzene, toluene, ethylbenzene, and xylene hydrocarbons (the BTEX) compounds). Capillary columns based on a nonpolar shape-selective phase, a chiral stationary phase, and a polyalkylene glycol phase, and support coated open tubular columns (SCOT), exhibit differing abilities to resolve these compounds. A Bentone ...

Dec. 31, 1994

By MilliporeSigma

Fast GC-MS Analysis of US EPA Method 8270D Semivolatiles Using Supelco SLB-5ms

US EPA Method 8270D specifies a procedure for the determination of semivolatiles in solid waste and ground water samples. The method specifies that all analyses must be completed within 12 hours of meeting specific MS tune criteria. In this application, the principles of fast GC were applied to analyze a typical 8270 analyte list in under 8.5 minutes. This was achieved by using a 20 m x 0.18 ...

Dec. 31, 2006

By MilliporeSigma

GC-MS Analysis of Volatile Organic Compounds in Wastewater According to US EPA Method 624

Environmental contamination has been at the forefront of government policy and regulation since the US EPA was established in 1970. Over the years the US EPA has developed, published, and updated multiple methods for analysis of environmental pollutants, and single-quadrupole gas chromatography-mass spectrometry (GCMS) has long been the technique of choice for determination of volatile organic ...

Dec. 1, 2014

By Shimadzu Scientific Instruments Inc

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

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. However, real-world samples pose a greater challenge. ...

Oct. 28, 2011

By PerkinElmer, Inc.

Low Level Determination of Polynuclear Aromatic Hydrocarbons in Environmental Samples, Using GC/MS

Low level analysis of PAHs is required to attain various clean-up limits for environmental regulations. The ability to maximize GC/MS instrument conditions to meet lower reporting levels results in a more efficient and reliable determination of these analytes. The following analysis provides the necessary sensitivity and selectivity. The procedure requires that the parameters for GC as well as MS ...

Dec. 31, 1999

By MilliporeSigma

Validation of USEPA Method 524.2 Using a Stratum PTC, AQUATek 100 Autosampler, and Perkin-Elmer Clarus 600 GC/MS

The US EPA developed Method 524.2¹, “Measurement of Purgeable Organic Compounds in Water by Capillary Column Gas Chromatography/Mass Spectrometry”, for identifying and measuring purgeable volatile organic compounds (VOC) in surface water, groundwater, and drinking water. Due to the required sensitivity of this method, the use of purge and trap gas chromatography is vital. This ...

Apr. 11, 2010

By Teledyne Tekmar

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

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 (1) provides the guidance necessary for identifying ...

Oct. 28, 2011

By PerkinElmer, Inc.

Fast analysis of semi-volatile organic compounds using PTV-GC–TOF MS

The evaluation of semi-volatile organic compounds (SVOCs) in environmental matrices poses many challenges for the analyst, not least the vast number that may be encountered in any given analysis. In addition, analyte reactivity and the potential for multiple analytes to co-elute makes achieving the required method detection limits (LODs or MDLs) quickly and cost-effectively a formidable task ...

Jul. 29, 2016

By SepSolve Analytical

Determination of VOCs in water using static headspace GC/MS with simultaneous full scan and selective ion recording

The combination of static headspace sample introduction and gas chromatography/mass spectrometry (HS/GC/MS) provides the analyst with a powerful, fully automated technique for the determination of trace volatile organic compounds (VOCs) in water. Samples may be hermetically sealed in the headspace vial at the point of sampling. This approach avoids errors due to glassware cross-contamination and ...

Oct. 28, 2011

By PerkinElmer, Inc.

Environmental Applications Performed Using Equity Capillary GC columns

Various Environmental Applications performed on the Supelco® Equity line of capillary GC columns; specifically the 100% poly(dimethylsiloxane) and poly(5% diphenyl.95% dimethylpolysiloxane) phases. Applications include the following; USEPA Method 8270 for semivolatile compounds; USEPA Method 8081 for chlorinated pesticides; USEPA Method 8082 for polychlorinated biphenyls; diesel fuel; ...

Dec. 31, 2003

By MilliporeSigma

Analyze Trace Amounts of Solvents in Water Using Packed Column GC

Glass or stainless steel columns containing 80/120 Carbopack B/3% SP-1500 packing can be used to analyze water-based samples for ppm to low percentage levels of many organic compounds. This bulletin describes minimum detection limits and maximum capacity of these columns, adsorption and memory effects, and other factors that affect component quantitation. Problems are defined that might arise ...

Jun. 5, 2012

By MilliporeSigma

Rxi-624Sil MS Exceptionally Inert, Low Bleed Columns for Volatiles Analysis

- Optimized selectivity for volatiles and polar compounds ensures good separations. - Highly inert columns improve accuracy and allow lower detection limits, even for active compounds. - Most thermally stable 624 column available; low bleed, fully MS compatible. While mid polarity 624 columns are widely used for analyzing polar analytes and volatile organic compounds (VOCs), not all columns ...

May 24, 2012

By Restek Corporation

2.1 mm ID micro carbamates column ideal for LC-MS confirmation

Post-column derivatization of carbamates with hydroxide and OPA is the method of choice for the detection of carbamates because of its high selectivity and high sensitivity (US EPA 531.1 & AOAC 985.23). To confirm the finding of carbamates in the tested samples, there are various possibilitites: To confirm the finding of carbamates in the tested samples, there are various ...

Jun. 10, 2010

By Pickering Laboratories, Inc.

Aflatoxin & ochratoxin sample preparation columns

Simultaneous Analysis of Aflatoxins and Ochratoxin A - Sample Preparation Aflatoxins and Ochratoxin A are produced by fungi, e.g. Aspergillus and Penicillium species. Therefore both toxin types are found together in many foods and animal feeds, e.g. cereals. Thus it is appropriate to analyze one extract for the occurrence of both mycotoxins in a single step. A significant assistance ...

Jun. 10, 2010

By Pickering Laboratories, Inc.

GC Determination of Benzene in Reformulated Gasoline using a Supelco SLB-IL111 Ionic Liquid Column

The amount of benzene in gasoline is a concern because it is a known human carcinogen, and exposure to it has been linked to detrimental health effects. The challenge with the analysis lies in the complex composition of gasoline, which consists of hundreds of different compounds. This application shows the separation of benzene and other gasoline compounds using a 60 m x 0.25 mm I.D., ...

Nov. 7, 2012

By MilliporeSigma

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