Oils containing 0~100 ppm biphenyl and phenyl ether were analyzed by a new gas chromatographic method. Correlation coefficients (r) between gas chromatographic peak heights and biphenyl and phenyl ether concentrations were 0.99 and 0.98, respectively. As little as 5 ppm biphenyl and phenyl ether in oils could be determined rapidly and efficiently in 90 min by this new method.
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Min et al. (1982) studied this question.
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