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首页> 外文期刊>Journal of Agricultural and Food Chemistry >S-oxygenation of thiobencarb in tap water processed by chlorination.
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S-oxygenation of thiobencarb in tap water processed by chlorination.

机译：氯化处理后的自来水中硫代苯甲酸的S-加氧。

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Thiobencarb was incubated in tap water containing 0.7 mg/litre residual chlorine at 30deg C, and the solution was analysed by HPLC. Thiobencarb could not be detected after 3 h, and only a by-product was detected. The increase in concentration of the by-product correlated well with the decrease in thiobencarb concentration. In a high free chlorine medium (more than 10 mg/litre), the by-product degraded to p-chlorobenzyl alcohol, p-chlorobenzaldehyde, and p-chlorobenzyl chloride, but not in a low free chlorine medium (0.1-10 mg/litre). The by-product was identified to be thiobencarb sulfoxide by LC/MS, infrared, and NMR spectra, and a reduction technique using 2-mercaptoethanol. Chiral HPLC analysis made it clear that the sulfoxide was a racemic compound. The sulfoxide was mutagenic regardless of the presence or absence of S9mix in the Ames Salmonella typhimurium TA100 assay. It was suggested that the management and control of thiobencarb in tap water processed by chlorination should include monitoring of thiobencarb sulfoxide, using HPLC.
机译：将硫苯威在30°C下于含0.7 mg / L残留氯的自来水中孵育，并通过HPLC分析溶液。 3小时后未检测到硫苯威，仅检测到副产物。副产物浓度的增加与硫代苯甲酸浓度的减少有很好的相关性。在高游离氯介质中（大于10 mg / L），副产物降解为对氯苄醇，对氯苯甲醛和对氯苄基氯，但在低游离氯介质中则不降解（0.1-10 mg / L）。升）。通过LC / MS，红外和NMR光谱，以及使用2-巯基乙醇的还原技术，将副产物鉴定为硫代苯甲亚砜。手性HPLC分析清楚地表明亚砜是外消旋化合物。无论在鼠伤寒沙门氏菌TA100分析中是否存在S9mix，亚砜都是致突变的。建议通过氯化处理的自来水中的硫代苯甲威的管理和控制应包括使用HPLC监测硫代苯甲亚砜。

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