Woudneh Million B, Oros Daniel R
AXYS Analytical Services Ltd., 2045 Mills Road West, Sidney, B.C., Canada V8L 3S8.
J Chromatogr A. 2006 Nov 24;1135(1):71-7. doi: 10.1016/j.chroma.2006.09.017. Epub 2006 Sep 26.
A new method for determination of pyrethroids, pyrethrins, and piperonyl butoxide (PBO) by high-resolution gas chromatography/high-resolution mass spectrometry (HRGC/HRMS) was developed for aquatic sediments. The method detection limits for pyrethroids (15 compounds), pyrethrins, and PBO ranged from 0.16 to 1.50 ng/g sediment, which was suitable for detecting these chemicals at environmentally relevant concentrations (low ng/L range) that are toxicologically significant to benthic organisms. Recovery of the analytes from a low level spiked sediment ranged from 89.7% to 135%. Resmethrin showed the lowest recovery at 23.5% and pyrethrins showed the highest recovery at 154%. To confirm the utility of this new method for environmental applications, sediment samples collected from five tributaries of the San Francisco Bay, California were analyzed. Individual pyrethroids were detected in concentrations of up to 17.6 ng/g, while PBO was detected in all sediment samples in concentrations of 0.010-0.215 ng/g. Pyrethrins were not found in the sediment samples.
开发了一种利用高分辨率气相色谱/高分辨率质谱（HRGC/HRMS）测定水生沉积物中拟除虫菊酯、除虫菊酯和胡椒基丁醚（PBO）的新方法。拟除虫菊酯（15种化合物）、除虫菊酯和PBO的方法检测限为0.16至1.50 ng/g沉积物，适用于检测对底栖生物具有毒理学意义的环境相关浓度（低ng/L范围）的这些化学物质。低水平加标沉积物中分析物的回收率为89.7%至135%。反式氯菊酯回收率最低，为23.5%，除虫菊酯回收率最高，为154%。为了确认这种新方法在环境应用中的实用性，对从加利福尼亚州旧金山湾的五条支流采集的沉积物样本进行了分析。检测到的单个拟除虫菊酯浓度高达17.6 ng/g，而在所有沉积物样本中均检测到PBO，浓度为0.010 - 0.215 ng/g。在沉积物样本中未发现除虫菊酯。
