Recovery and Identification of Organics in Water

Hoak, Richard D.

doi:10.1016/b978-1-4832-8391-3.50017-8

Cited by 6 publications

(2 citation statements)

References 9 publications

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“…He compared the degradation products and reported evidence of the aromatic and phenolic nature of the color molecules by identification of 3-methoxy-4-hydroxybenzaldehyde in oxidation mixtures of the color solids. Hoak (1962) described problems in the recovery and identification of organic substances in water. Several extraction techniques were used, and it was reported that continuous liquid-liquid extraction in a Scheibel 18-stage countercurrent column appeared to offer advantages over adsorption on carbon.…”

Section: Previous Researchmentioning

confidence: 99%

Organic acids in naturally colored surface waters

Lamar¹,

Goerlitz²

1966

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Most of the organic matter in naturally colored surface waters consists of a mixture of carboxylic acids or salts of these acids. Many of the acids color the water yellow to brown; however, not all of the acids are colored. These acids range from simple to complex, but predominantly they are nonvolatile polymeric carboxylic acids.The organic acids were recovered from the water by two techniques: continuous liquid-liquid extraction with n-butanol and vacuum evaporation at 50 °C. (centigrade). The isolated acids were studied by techniques of gas, paper, and column chromatography and infrared spectroscopy.About 10 percent of the acids recovered were volatile or could be made volatile for gas chromatographic analysis. Approximately 30 of these carboxylic acids were isolated, and 13 of them were individually identified. The predominart part of the total acids could not be made volatile for gas chromatographic analysis. Infrared examination of many column chromatographic fractions indicated that these nonvolatile substances are primarily polymeric hydroxy carboxylic acids having aromatic and olefinic unsaturation. The evidence suggests that some of these acids result from polymerization in aqueous solution. Elemental analysis of the sodium fusion products disclosed the absence of nitrogen, sulfur, and halogens.

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Section: Previous Researchmentioning

confidence: 99%

Organic acids in naturally colored surface waters

Lamar¹,

Goerlitz²

1966

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“…The carbon-adsorption metl id, which involves sample volumes as large as 5,000 gallons, has br^n applied with various techniques for the analysis of pesticides in wHer (Breidenbach and Lichtenberg, 1963). However, because the carbon-adsorption method is time-consuming and because recovery tends to be low and (or) quite conditional (Goodenkauf and Erdei, 1964;Grzenda and others, 1964;Hoak, 1964;Ryckman and others, 1964;Teasley and B8 Cox, 1963;Weber andMorris, 1963a, 1963b;and Wolf, 1963), attention is being given to more direct and highly sensitive techniques which can be performed with a sample of convenient size. Lovelock and Lipsky (1960) described a sensitive and seb-ctive device called an electron-affinity or electron-capture detector.…”

Section: Introductionmentioning

confidence: 99%

Identification and measurement of chlorinated organic pesticides in water by electron-capture gas chromatography

Lamar¹,

Goerlitz²,

Law³

1965

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Pesticides, in minute quantities, may affect the regimen of streams, and because they may concentrate in sediments, aquatic organisms, and edible aquatic foods, their detection and their measurement in the parts-per-trillion range are considered essential.In 1964 the U.S. Geological Survey at Menlo Park, Calif., began rese°rch on methods for monitoring pesticides in water. Two systems were selected electron-capture gas chromatography and microcoulometric-titration gas chromatography. Studies on these systems are now in progress. This report provides current information on the development and application of an electron-capture gas chromatographic procedure. This method is a convenient and eytremely sensitive procedure for the detection and measurement of organic pesticides having high electron affinities, notably the chlorinated organic pesticides. The electron-affinity detector is extremely sensitive to these substances bnt it is not as sensitive to many other compounds. By this method, the chlorinated organic pesticide may be determined on a sample of convenient size in concentrations as low as the parts-per-trillion range. To insure greater accuracy in the identifications, the pesticides reported were separated and identified by their retention times on two different types of gas chromatographic colnmns.

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Review of pollutants in petroleum refinery wastewaters and effect upon aquatic organisms

Burks

1982

Environment International

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Recovery and Identification of Organics in Water

Cited by 6 publications

References 9 publications

Organic acids in naturally colored surface waters

Organic acids in naturally colored surface waters

Identification and measurement of chlorinated organic pesticides in water by electron-capture gas chromatography

Review of pollutants in petroleum refinery wastewaters and effect upon aquatic organisms

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