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首页> 外文期刊>Journal of Agricultural and Food Chemistry >Method for the Detection of Desmethylbromethalin in Animal Tissue Samples for the Determination of Bromethalin Exposure
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Method for the Detection of Desmethylbromethalin in Animal Tissue Samples for the Determination of Bromethalin Exposure

机译:动物组织样品中去甲基溴甲蝶呤的检测方法,用于测定溴甲苄灵的暴露

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摘要

Bromethalin, a potent neurotoxin, is widely available for use as a rodenticide. As access to other rodenticides is reduced due to regulatory pressure, the use of bromethalin is likely to increase with a concomitant increase in poisonings in nontarget animals. Analytical methods for the detection of bromethalin residues in animals suspected to have been exposed to this rodenticide are needed to support post-mortem diagnosis of toxicosis. This paper describes a novel method for the analysis of desmethylbromethalin (DMB), bromethalin's toxic metabolite, in tissue samples such as liver, brain, and adipose. Samples were extracted with 5% ethanol in ethyl acetate, and an aliquot of the extract was evaporated dry, reconstituted, and analyzed by reverse phase ultrahigh-performance liquid chromatography-mass spectrometry. The mass spectrometer utilized electrospray ionization in negative ion mode with multiple reaction monitoring. This method was qualitatively validated at a level of 1.0 ng/g in liver tissue. The quantitative potential of the method was also evaluated, and a method detection limit of 0.35 ng/g wet weight was determined in fat tissue. DMB was detected in tissue samples from animals suspected to have been poisoned by this compound. To the authors' knowledge, there have been no other methods reported for analysis of DMB in tissue samples using LC-MS/MS.
机译:溴苄灵是一种有效的神经毒素,可广泛用作杀鼠剂。由于管制压力,减少了与其他灭鼠剂的接触,因此在非目标动物中,溴氰菊酯的使用可能会增加,同时中毒的数量也会增加。需要有分析方法来检测怀疑已暴露于这种灭鼠剂的动物体内的溴甲菊酯残留,以支持事后对中毒的诊断。本文介绍了一种新的方法,用于分析组织样本(例如肝脏,大脑和脂肪)中的去甲基溴甲烷的有毒代谢产物去甲基溴甲烷(DMB)。用5%乙醇的乙酸乙酯溶液萃取样品,并将萃取液的等分试样干燥蒸发,重构,并通过反相超高效液相色谱-质谱分析。质谱仪利用负离子模式的电喷雾电离,并进行多反应监测。定性验证了该方法在肝组织中的浓度为1.0 ng / g。还评估了该方法的定量潜力,并确定了脂肪组织中方法检测限为0.35 ng / g湿重。在怀疑被该化合物中毒的动物的组织样品中检测到DMB。据作者所知,没有其他方法报道使用LC-MS / MS分析组织样品中的DMB。

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