美国环境保护局（USEPA）地下水和地下水管理办公室 饮用水（OGWDW）收集潜在污染物的国家发生数据 未来饮用水监管候选人，使用不受监管的污染物监测 法规（UCMRs）。污染物可从污染物候选列表中选择 （CCL），或可能是新出现的污染物，有可能包含在未来的CCL中。在里面 将污染物纳入UCMR的命令，UCMR是一种标准化的污染物分析方法 饮用水中的测量必须可用。有助于在全国范围内收集 根据发生数据，该方法必须适用于各种饮用水水源，且敏感 并且具有高度的特异性，以最大限度地减少误报，而且必须具有成本效益和鲁棒性 足够在商业实验室环境中使用。一组11种新出现的污染物 正在评估是否包含在一种或多种饮用水方法中，以备将来可能使用 UCMR。这些方法将利用固相萃取（SPE）进行分析物浓度和浓度测定 用于鉴定和定量的气相色谱/质谱（GC/MS）。潜在的 污染物包括乙酰甲胺磷、卡普坦、二甲硫平、乙硫磷、硝基苯、邻甲苯胺、氧氟醚、， 丙溴磷、喹啉、戊唑醇和三溴磷。初步数据显示，8年的回收率 在酸性或酸性条件下提取1L样品时，11种污染物的浓度范围为70-130% 或各种聚合物吸附剂上的中性pH值。喹啉和邻甲苯胺酮只能在室温下提取 中性pH值和pH值分别在约90%和50%时恢复。乙酰甲胺磷 在C-18和所有评估的聚合物吸附剂上以8%或更低的回收率回收。分开21天 采用美国环保局方法527样品保存方案进行保温时间研究 pH值为3.8时，美国环保局方法526中性pH下的样品保存方案- 甲苯胺酮， 喹啉和二甲硫平在酸性条件下对聚苯乙烯的回收率很低 二乙烯基苯（PSDVB）磁盘。卡普坦在21天内表现出显著降解。后果 中性pH方案的结果与pH 3.8的保持时间结果相似，但与喹啉类似 萃取效率显著提高，卡坦降解速度更快。包括12个参考文献、表格、图表。

The U.S. Environmental Protection Agency's (USEPA) Office of Ground Water and Drinking Water (OGWDW) collects national occurrence data on contaminants that are potential candidates for future regulation in drinking water, using Unregulated Contaminant Monitoring Regulations (UCMRs). The contaminants may be selected from the 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 the UCMR, a standardized analytical method for its measurement in drinking water must be available. To be useful in collecting nationwide occurrence data, the method must be rugged across a range of drinking water sources, sensitive and highly specific to minimize false positives, and must also be cost effective and robust enough for use in commercial laboratory settings. A group of 11 emerging contaminants are being evaluated for inclusion in one or more drinking water methods for possible use in a future UCMR. These methods will utilize solid phase extraction (SPE) for analyte concentration and gas chromatography/mass spectrometry (GC/MS) for identification and quantitation. Potential contaminants include acephate, captan, dimethipin, ethion, nitrofen, o-toluidine, oxyfluorfen, profenofos, quinoline, tebuconazole, and tribufos. Preliminary data have shown recoveries for 8 of the 11 contaminants in the range of 70-130% when 1L samples were extracted at either acidic or neutral pH on various polymeric sorbents. Quinoline and o-toluidine were extractable only at neutral pH and were recovered at approximately 90% and 50%, respectively. Acephate was recovered at 8% or less on C-18 and on all polymeric sorbents evaluated. Separate 21-day holding time studies were performed using the USEPA Method 527 sample preservation scheme at pH 3.8 and the USEPA Method 526 sample preservation scheme at neutral pH. o-Toluidine, quinoline, and dimethipin exhibited poor recoveries under acidic conditions on polystyrene divinylbenzene (PSDVB) disks. Captan exhibited significant degradation over 21 days. Results from the neutral pH scheme were similar to pH 3.8 holding time results, but with quinoline exhibiting significant improvement in extraction efficiency and captan degrading at a faster rate. Includes 12 references, table, figures.