美国环境保护局（USEPA）地下水和地下水管理办公室 饮用水（OGWDW）收集全国饮用水污染物的发生数据 使用不受监管的污染物监测法规（UCMRs）。这些污染物可能是 从饮用水污染物候选名单（CCL）中选择，或可能出现 可能包含在未来CCL中的污染物。为了让污染物 包括在未来的UCMR中，一种标准化的分析方法，用于测量饮用水的浓度 必须有水。一组13种化学污染物正在被评估是否包含在内 在直接水进样液相色谱/串联质谱（DAILC）中/ MS/MS）方法。获得了所有13种化学污染物的初步数据。对于 以10µg/L强化的氯化自来水，回收率在83%到106%之间，相对标准偏差为 13种化学品中的11种的标准偏差为0.8-7.9%。包括21个参考文献和表格。

The U.S. Environmental Protection Agency's (USEPA) Office of Ground Water and Drinking Water (OGWDW) collects national occurrence data on drinking water contaminants using Unregulated Contaminant Monitoring Regulations (UCMRs). These contaminants may be selected from the Drinking Water Contaminant Candidate List (CCL), or may be emerging contaminants with the potential for inclusion on future CCLs. In order for a contaminant to be included in a future UCMR, a standardized analytical method for its measurement in drinking water must be available. A group of 13 chemical contaminants are being evaluated for inclusion in a direct aqueous injection-liquid chromatography/tandem mass spectrometry (DAILC/ MS/MS) method. Preliminary data were obtained for all 13 chemical contaminants. For chlorinated tap water fortified at 10 µg/L, recoveries ranged from 83 to 106% with a relative standard deviation of 0.8-7.9% for 11 of the 13 chemicals. Includes 21 references, tables.