Trace organic components as fingerprints in gas chromatographic identification of spilled asphalts

Kawahara, Fred K.

doi:10.1021/es60119a006

Cited by 5 publications

(3 citation statements)

References 4 publications

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“…Sulfonates, benzoate, and phthalate were chromatographically separated, and retention volumes were also found to increase with increasing concentration of sodium chloride in the mobile phse (5,6). More recent studies (7)(8)(9) have confirmed this electrolyte effect and have led to the suggestion that ionpairing might account for the increased retention.…”

Section: Literature Citedmentioning

confidence: 89%

“…Such approaches are contributing to enforcement of environmental protection laws. Analytical data employed for petroleum sample classification include gas chromatograms (1)(2)(3)(4)(5)(6), infrared spectra (7)(8)(9)(10)(11)(12), the combination of the two techniques (13), trace metal concentrations (14,15), luminescence spectrometry (26), field ionization mass spectrometry (27), high pressure liquid chromatography (18), thin-layer chromatography (19), and other methods (20)(21)(22)(23)(24). The applicability and relative merits of these methods have been discussed recently in reviews by Bentz (25,26).…”

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confidence: 99%

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Classification of crude oil gas chromatograms by pattern recognition techniques

Clark¹,

Jurs²

1979

Anal. Chem.

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Pattern recognition methods have been employed to classify crude oils based on their gas chromatograms. Four oil types were represented by gas chromatograms taken before and after artificial weathering. The chromatograms were hand digitized and coded with 13 descriptors each-peak areas for the normal alkanes for C16 through C25 plus pristane and phytane and also one descriptor characterizing the unresolved background. A statistical algorithm was used to find the best subsets of descriptors to use with Bayesian discriminant analysis. A variety of different partitions of the data set showed the similarities of some classes of oils and some dissimilarities for others. The nonparametric linear learning machine method of discriminant training was also applied to various partitions of the data. Predictive abilities as high as 100% were obtained for some of the partitions of the data set.

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Section: Literature Citedmentioning

confidence: 89%

mentioning

confidence: 99%

Classification of crude oil gas chromatograms by pattern recognition techniques

Clark¹,

Jurs²

1979

Anal. Chem.

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“…Kawahara (51) found that he could identify spilled asphalts by making the pentafluorobenzyl thioethers and ethers from traces of mercaptans and phenols in asphalts, and separating them by gas chromatog raphy, using an electron capture detector to obtain the distinctive chromatograms.…”

Section: The Use Of a Straight Percent Difference Calculationmentioning

confidence: 99%

Oil Spill Identification and Remote Sensing

Bentz

1980

Advances in Chemistry

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Techniques and procedures for preparation of aquatic samples for chromatographic analyses

Onuska¹

1989

J. High Resol. Chromatogr.

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The measurement of low levels of organic compounds in environmental samples presents the researcher with a number of possible pathways to effectively obtain and analyze samples. Numerous sampling methods, sample preparation techniques, and extraction procedures are available. A number of different approaches to sampling strategy, isolation, concentration, cleanup and fractionation will be discussed. Objectives for collecting environmental samples differ from those for many other types of samples because reliable measurements at very low levels are frequently required. Often, specific analytes need to be measured at the μg/kg and even ng/kg levels in complex matrices. Advances in analytical methodology continue to lower the levels at which reliable measurements can be made. At these levels, many factors that are of little or no concern in other analytical measurements are of critical importance in influencing the outcome and reliability of environmental analyses. Analytical measurements are used for determining the composition and the quantities of analytes in the defined system at various concentration levels. Environmental analytical measurements provide data about the transportation and transformation of an environmental contraminant and for determination of its concentration in a sample.

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Trace organic components as fingerprints in gas chromatographic identification of spilled asphalts

Cited by 5 publications

References 4 publications

Classification of crude oil gas chromatograms by pattern recognition techniques

Classification of crude oil gas chromatograms by pattern recognition techniques

Oil Spill Identification and Remote Sensing

Techniques and procedures for preparation of aquatic samples for chromatographic analyses

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