首页 馆藏资源 舆情信息 标准服务 科研活动 关于我们
现行 AWWA WQTC58857
到馆提醒
收藏跟踪
购买正版
Analysis of Polar Turfgrass Pesticides in Water by ESI/LC/MS Coupled with SPE Technology ESI/LC/MS结合SPE技术分析水中极性草坪草农药
发布日期: 2003-11-02
本研究开发了一种用于分析的电喷雾电离(ESI)液相色谱/质谱(LC/MS)方法 北美洲常用的极地草坪草杀虫剂。水 首先使用固相萃取(SPE)技术提取样品。随后进行了分析 配备了配备ZMD探测器的Waters 2690 LC。分离是 在反相C18柱上执行。乙腈/5毫米醋酸铵溶液 以水为溶剂进行梯度流动相分析。流量很小 设定为0.25毫升/分钟。注射量为20微升。 该方法可有效地用于草坪草农药的分析 成品饮用水、地下水和地表水的低挥发性。这些 污染物包括苯磺胺、氯吡啉、卤虫腈、吡虫啉、美可洛普、, 尼布隆、谷扎林、多效唑、三唑酮、三唑醇等。 A是双酚d16 用作内部标准。4-(4'-溴苯基)苯酚被用作替代物。 校准范围为0.05-30 ug/L。方法检测限(MDL) 通过测量七个重复的实验室强化空白样品在 方法报告水平(MRL)为0.5 ug/L或更低。MDL计算为 重复分析的标准偏差与学生t值的乘积 99%的置信度和n-1自由度。方法准确度(平均值) 回收率)和精密度(相对标准偏差,RSD)由 测量四个在5-10 ug/L下添加的实验室强化空白样品(LFB)。包括9个参考文献和表格。
This study developed an electrospray ionization (ESI) liquid chromatography/mass spectrometry (LC/MS) method for the analysis of polar turfgrass pesticides that are commonly used in North America. The water samples were first extracted by using a solid phase extraction (SPE) technique. The analysis was then carried out with a Waters 2690 LC equipped with a ZMD detector. The separation was performed on a reverse phase C18 column. Acetonitrile/5 mM ammonium acetate in water were used as the solvents for the gradient mobile phase profile. The flowrate was set to 0.25 mL/min. The injection volume was 20 uL. This method was effectively used for the analysis of a number of turfgrass pesticides of low volatility in finished drinking water, groundwater, and surface water. These contaminants included bensulide, clopyralid, halofenozide, imidacloprid, mecoprop, neburon, oryzalin, paclobutrazol, triadimefon, triadimenol, etc. Bisphenol A-d16 was used as the internal standard. 4-(4'-bromophenyl)phenol was used as the surrogate. The calibrations were in a range of 0.05-30 ug/L. The method detection limits (MDLs) were determined by measuring seven replicate laboratory fortified blanks spiked at the method reporting level (MRL) at 0.5 ug/L or less. The MDLs were calculated as a product of the standard deviation of the replicate analyses and the student's t value with a 99% confidence level and a n-1 degree of freedom. The method accuracy (mean recovery) and precision (relative standard deviation, RSD) were determined by measuring four replicate laboratory fortified blanks (LFBs) spiked at 5-10 ug/L. Includes 9 references, tables.
分类信息
发布单位或类别: 美国-美国给水工程协会
关联关系
研制信息
相似标准/计划/法规