本文描述了新泽西州用于确定饮用水中22种有机化合物的实际定量水平（PQL）的方法。使用六个国家认证实验室进行了实验室间研究。使用美国环境保护局方法502.1、503.1和524.1对浓度范围为0.1至20 ug/L的样品进行分析。结果表明，随着浓度的降低，精密度和准确度明显降低。挥发性有机污染物的可接受定量为1至5 ug/L。 PQL受方法中单个分析物性能的影响。表8包括参考文献。

This article describes the approach used by the state of New Jersey to determine practical quantitation levels (PQLs) for 22 organic compounds in drinking water. An interlaboratory study was conducted using six state-certified laboratories. Samples with concentrations ranging from 0.1 to 20 ug/L were analyzed using US Environmental Protection Agency methods 502.1, 503.1, and 524.1. Results indicated a clear decrease in precision and accuracy with decreasing concentration. Acceptable quantitation could be achieved between 1 and 5 ug/L for volatile organic contaminants. The PQLs were affected by the individual analyte's performance in the methods. Includes 8 references, tables.