本文介绍了吹扫捕集气相色谱/离子捕集质谱法，每月分析消毒副产物氯化氰约100个样品。该方法的检测限为2.20 ug/L，线性动态范围为0.1-20 ug/L，从强化加标回收率和重复样品结果来看，该方法具有良好的准确性和精密度。方法坚固性也非常好。在第二个独立实验室进行的质量控制分析也非常一致。在研究的第一年中，与高百分比分析样品相关的数据符合DBP/ICR分析方法手册中规定的所有EPA质量控制性能标准。最后，报告了一项时间存储研究的数据，该研究将剩余的第一季度ICR样本中的151个额外存储7天，然后进行分析。这些样品的pH值范围为4.2至8。 4，显示出12%的平均损失（相对于第一天的测量），pH值对恢复表现出略微显著的影响。分析前在实验室额外保留七天的重复样品的平均回收率（收集时的八天）在一定程度上抵消了对化合物降解对第二天结果准确性的影响的担忧。

This paper describes the Purge and Trap-Gas Chromatography/Ion Trap Mass Spectrometry method which analyzes approximately 100 samples per month for the disinfection byproduct cyanogen chloride. This method has a detection limit of 2.20 ug/L and a linear dynamic range of 0.1-20 ug/L, has demonstrated excellent accuracy and precision as judged from fortified spike recoveries and duplicate sample results. Method ruggedness has also been excellent. Quality control splits analyzed at a second independent laboratory were also in good agreement. Data associated with a very high percentage of the sample analyzed during the first year of the study have met all EPA quality control performance criteria specified in the DBP/ICR Analytical Methods Manual. Finally, data from a time storage study, where 151 of the remaining first quarter ICR samples were stored an additional 7 days and then analyzed, are reported. These samples, which spanned a pH range of 4.2 to 8.4, displayed an average loss (relative to the day one measurement) of 12 percent and pH exhibited a marginally significant effect on recovery. Average recoveries for duplicate samples held an additional seven days at the laboratory prior to analysis (eight from time of collection) somewhat offsets the concern about the effect that compound degradation has on the accuracy of the second day results.