Gas chromatography purge and trap

Liu JM, Jiang GB, Zhou QF (2001) Comprehensive trace-ievei determination of methyitin compounds in aqueous sampies by cryogenic purge-and-trap gas chromatography with fiame photometric detection. Analytical Sciences, 7(11) 1279-1283. 

Xu XR, Gu J-D (2004) Elucidation of methyl ferf-butyl ether degradation with Fe2+/H202 by purge-and-trap gas chromatography-mass spectrometry. Micro-chemJ 77 71-77... 

Ashley DL, Bonin MA, Cardinali FL. 1992. Determining volatile organic compounds in human blood from a large sample population by using purge and trap gas chromatography/mass spectrometry. Anal Chem 64 1021-1029. 

Kester, P.E. (1987 ) Analysis of Volatile Organic Compounds in Soils by Purge and Trap Gas Chromatography. Tekmar Company, PO Box 371856, Cincinnati, Ohio, 45222-1856. 

Capillary Column use in Purge and Trap Gas Chromatography II Use of the Model 1000 Capillary Interface, Tek/Data B021684, Tekmar Company, Cincinnati, Ohio. 

Zero-headspace procedures involve the collection of a soil sample with immediate transfer to a container into which the sample fits exactly. The only space for gases is that within the soil pores. The volume of sample collected depends on the concentration of volatiles in the soil. It is imperative that the container employed can be interfaced directly with the gas chromatograph. Several commercial versions of zero-headspace sampling devices are available. The sample is transported to the laboratory at 4°C, where it is analyzed directly by purge-and-trap gas chromatography (EPA 5035) or other appropriate techniques, such as vacuum distillation (EPA 5032) or headspace (EPA 5021). 

Solvent extraction procedures involve collection of sample by an appropriate device and subsequent immediate placement into a borosilicate glass vessel, which contains a known quantity of ultrapure methanol. The bottle is then transported to the laboratory at 4°C, and the methanol fraction analyzed by purge-and-trap gas chromatography (or a similar procedure). 

Thompson DW. 1994. Determination of volatile organic contaminants in bulk oils (edible, injectable, and other internal medicinal) by purge-and-trap gas chromatography/mass spectrometry. J AOAC Int 77(3) 647-654. 

EPA. 1989d. Measurement of volatile aromatic and unsaturated organic compounds in water by purge and trap gas chromatography - method 503.1. Cincinnati, OH U.S. Environmental Protection Agency, Environmental Monitoring Systems Laboratory. 

E. Control chart. Volatile compounds in human blood serum were measured by purge and trap gas chromatography/mass spectrometry. For quality control, serum was periodically spiked with a constant amount of 1,2-dichlorobenzene and the concentration (ng/g = ppb) was measured. Find the mean and standard deviation for the following spike data and prepare a control chart. State whether or not the observations (Obs.) meet each of the criteria for stability of a control chart. 

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