Add time:07/17/2019 Source:sciencedirect.com
Group extraction of the metabolites of 4-acetoxy-2-(4-methylphenyl)benzothiazole has been achieved through the use of an immunoaffinity adsorbent. The antisera elicited from an immunogen, 4-hydroxy-2-(4-formylphenyl)benzothiazole O-carboxymethyloxime-bovine serum albumin conjugate, were characterized to have a broad affinity spectrum for major metabolites oxidized at the 4-methyl group of the benzene moiety. One millilitre of the immunoaffinity adsorbent prepared by immobilization of antibodies (12.5 mg ml−1) was capable of retaining up to 4 μg of benzothiazoles. The adsorbates were recovered quantitatively by elution with 90% (v/v) methanol without any interfering peaks on the high-performance liquid chromatogram. The peak-height ratio of each metabolite to an internal standard was plotted against the concentration of the former substance; good linearity was observed in the range of 10–500 ng ml−1.
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