Journal ArticleDOI
Screening of trihalomethanes by direct aqueous injection using electron capture detection
Duncan Carmichael,William Holmes +1 more
TLDR
In this paper, direct aqueous injection is used for the rapid screening of trihalomethanes and other volatile organic compounds (VOC's) in water by direct on column injection of the water sample in to wide bore capillary columns, to which is attached an electron capture detector.Abstract:
The disinfection of drinking water with chlorine produces carcinogenic by-products called trihalomethanes or (THM's). These compounds are formed when the chlorine reacts with the organic matter in the raw water. The four major THM's are chloroform, bromodichloromethane, dibromochromethane, and bromoform. Direct aqueous injection is used for the rapid screening THM's and other volatile organic compounds (VOC's) in water by direct on column injection of the water sample in to wide bore capillary columns, to which is attached an electron capture detector.read more
Citations
More filters
Journal ArticleDOI
Comparison of methods for determination of volatile organic compounds in drinking water.
TL;DR: Comparison of four methods including liquid-liquid extraction (LLE), direct aqueous injection (DAI), purge and trap (PAT) and head space (HS) was carried out for determination of volatile organic compounds (VOCs) including trihalomethanes (THMs) in drinking water to show the advantages and disadvantages.
Journal ArticleDOI
Trace level analysis of micropollutants in aqueous samples using gas chromatography with on-line sample enrichment and large volume injection
TL;DR: An overview of methods for the analysis of aqueous samples with capillary gas chromatography is presented in this paper, where the emphasis is on methods in which sample preparation and GC analysis are combined on-line.
Journal ArticleDOI
Method for determination of methyl tert-butyl ether and its degradation products in water
TL;DR: In this paper, an analytical method is described that can detect the major alkyl ether compounds that are used as gasoline oxygenates (methyl tert-butyl ether, MTBE, ETBE, and tert-amyl methyl ether, TAME) in water at sub-ppb concentrations.
Journal ArticleDOI
Analysis of Drinking Water for Trace Organics
C. J. Koester,R. E. Clement +1 more
TL;DR: In this article, the authors proposed a method based on gas chromatography-mass spectrometry (GC-MS) to detect organics at parts per trillion (P2T) concentrations.
Journal ArticleDOI
Determination of trihalomethanes and some chlorinated solvents in drinking water by headspace technique with capillary column gas-chromatography
Jorma Kuivinen,Håkan Johnsson +1 more
TL;DR: In this paper, a simple and rapid headspace method for gas chromatographic determination of trihalomethanes and some chlorinated solvents in drinking water is described, based upon the internal standard 1,1,2-trichloroethane, which elutes in the middle of the chromatogram.
References
More filters
Journal ArticleDOI
Halogenated Hydrocarbons in and over the Atlantic
TL;DR: McCarthy as discussed by the authors estimated that the integrated production of CCl2F2 and CCl3F, the two principal compounds of the class, was about one megaton of each in mid 1971; they are unusually stable chemically and only slightly soluble in water and might therefore persist and accumulate in the atmosphere.
Journal ArticleDOI
NAtural halocarbons in the air and in the sea.
TL;DR: These measurements confirm those of R. Rasmussen who found methyl chloride in rural air over the West Coast of the USA and reveal methyl chloride as the dominant halocarbon of the atmosphere and the possible bearing on the chlorine-catalysed destruction of stratospheric ozone is discussed.
Journal ArticleDOI
Organic substances in potable water and in its precursor. I. Methods for their determination by gas-liquid chromatography.
TL;DR: Organic substances are liberated from potable water and transferred to a very small amount of charcoal in a hermetically closed circuit system, in which the carrier may be an inert gas or water vapour, yielding complementary results.
Journal ArticleDOI
Concentration and analysis of trace volatile organics in gases and biological fluids with a new solid adsorbent
TL;DR: In this paper, a new procedure for sampling, transfer, and analysis of volatile organic compounds by gas chromatography has been developed, where an adsorbent trap ultimately becomes an insert for a modified injector port, and a valve system allows the sample to be transferred to a cooled precolumn and finally to the separating column.
Journal ArticleDOI
Organic substances in potable water and in its precursor
TL;DR: In a sample of accidentally contaminated water the degree and the (unexpected) source of contamination have been determined, neither of which could be done by commonly used methods.