Investigation of the Fate of Trifluralin in Shrimp
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- 作者：Danny Chan ; Richard J. Fussell ; Mike T. Hetmanski ; Chris J. Sinclair ; Jack F. Kay ; Andrew Grant ; Matthew Sharman
- 刊名：Journal of Agricultural and Food Chemistry
- 出版年：2013
- 出版时间：March 13, 2013
- 年：2013
- 卷：61
- 期：10
- 页码：2371-2377
- 全文大小：262K
- 年卷期：v.61,no.10(March 13, 2013)
- ISSN：1520-5118
文摘
Juvenile Pacific white shrimp (Litopenaeus vannamei) were exposed to trifluralin at 0.1 and 0.01 mg L鈥? for 72 h under controlled conditions. Samples of shrimp and tank water were collected at intervals up to 48 days after exposure. Analysis of the shrimp tissues by gas chromatography鈥搈ass spectrometry (GC-MS) and ultrahigh-performance liquid chromatography鈥搎uadrupole time-of-flight mass spectrometry (UHPLC-qToF-MS) in combination with profiling and metabolite identification software (Agilent MET-ID and Mass Profiler Professional) detected the presence of parent trifluralin together with two main transformation products (TPs), 2-ethyl-7-nitro-5-(trifluoromethyl)benzimidazole (TP1) and 2-amino-6-nitro-4-(trifluoromethyl)phenyl)propylamine (TP2). The highest concentration of trifluralin, determined by GC-MS, was 120 渭g kg鈥? at 0 day withdrawal. Residues of trifluralin (CC伪 = 0.25 渭g kg鈥?, CC尾 = 0.42 渭g kg鈥?) were detectable for up to 7 days after exposure. Similarly, the highest concentrations of TP1 and TP 2, determined by liquid chromatography鈥搈ass spectrometry/mass spectrometry (LC-MS/MS), were 14 and 18 渭g kg鈥?, respectively. Residues of TP1 (CC伪 = 0.05 渭g kg鈥?, CC尾 = 0.09 渭g kg鈥?) and TP2 (CC伪 = 0.1 渭g kg鈥?, CC尾 = 0.17 渭g kg鈥?) were detectable for up to 4 and 24 withdrawal days, respectively.