Woudneh Million Bekele, Oros Daniel Ray
AXYS Analytical Services Ltd., 2045 Mills Road West, Sidney, British Columbia V8L 3S8, Canada.
J Agric Food Chem. 2006 Sep 20;54(19):6957-62. doi: 10.1021/jf0609431.
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 surface water samples. The method is based on sampling 100 L of ambient surface water with a solid phase extraction (SPE) technique that uses both wound glass fiber filters for collecting the particulate-associated chemicals and XAD-2 resin for collecting the dissolved chemicals. The method detection limits of the analytes ranged from 0.58 to 8.16 ng/sample, which is equivalent to a detection limit range of 0.0058-0.082 ng/L for a 100 L water sample collected by the SPE technique. The SPE when coupled with HRGC/HRMS was a suitable match for detecting these chemicals at subnanogram per liter ranges that are toxicologically significant to aquatic organisms. To confirm the utility of this method for environmental applications, pyrethroids and PBO were found at subnanogram per liter concentrations in surface water samples collected from five tributaries (primarily urban creeks) of the San Francisco Bay, California.
开发了一种利用高分辨率气相色谱/高分辨率质谱法（HRGC/HRMS）测定地表水样中拟除虫菊酯、除虫菊酯和胡椒基丁醚（PBO）的新方法。该方法基于使用固相萃取（SPE）技术采集100 L环境地表水，该技术使用缠绕玻璃纤维滤膜收集与颗粒物相关的化学物质，并使用XAD - 2树脂收集溶解的化学物质。分析物的方法检测限范围为0.58至8.16 ng/样品，这相当于通过SPE技术采集的100 L水样的检测限范围为0.0058 - 0.082 ng/L。当SPE与HRGC/HRMS联用时，适合检测对水生生物具有毒理学意义的纳克每升以下浓度范围的这些化学物质。为了确认该方法在环境应用中的实用性，在从加利福尼亚州旧金山湾的五条支流（主要是城市小溪）采集的地表水样中发现了纳克每升浓度的拟除虫菊酯和PBO。
