Analysis of munitions constituents in groundwater using a field-portable GC-MS
Analysis of munitions constituents in groundwater using a field-portable GC-MS
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DOI：
10.1016/j.chemosphere.2012.01.042
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发表时间：
2012-05-01
期刊：
影响因子：
8.8
通讯作者：
MacMillan, D. K.
中科院分区：
文献类型：
--
作者：
Bednar, A. J.;Russell, A. L.;MacMillan, D. K.
在军事设施使用弹药成分会造成土壤和地下水污染，即使在培训或制造活动停止之后也需要定期监测。传统的地下水监测方法需要大量的水样（例如，2-4 L）在监管链下运送到固定实验室进行分析。样品还必须在冰上包装并避光，以尽量减少运输和储存过程中可能发生的降解。实验室的样品分析和报告周转时间可长达45天。这一过程妨碍了及时向客户报告数据;由于样本收集和报告之间的滞后时间，产生的数据不一定代表现场的当前状况;目前的工作比较了现场便携式气相色谱-质谱仪（GC-MS）与传统的实验室分析方法，采用高效液相色谱法和紫外吸收检测器进行分析。现场方法提供了近实时（类似于1小时的采样）地下水样品中的MCs浓度。质谱法提供了MC的可靠确认，并提供了一种鉴定未知化合物的方法，这些化合物是使用UV和其他非选择性检测器的方法的潜在假阳性。由爱思唯尔有限公司发布
The use of munitions constituents (MCs) at military installations can produce soil and groundwater contamination that requires periodic monitoring even after training or manufacturing activities have ceased. Traditional groundwater monitoring methods require large volumes of aqueous samples (e.g., 2-4 L) to be shipped under chain of custody, to fixed laboratories for analysis. The samples must also be packed on ice and shielded from light to minimize degradation that may occur during transport and storage. The laboratory's turn-around time for sample analysis and reporting can be as long as 45 d. This process hinders the reporting of data to customers in a timely manner; yields data that are not necessarily representative of current site conditions owing to the lag time between sample collection and reporting; and incurs significant shipping costs for samples.The current work compares a field portable Gas Chromatograph-Mass Spectrometer (GC-MS) for analysis of MCs on-site with traditional laboratory-based analysis using High Performance Liquid Chromatography with UV absorption detection. The field method provides near real-time (within similar to 1 h of sampling) concentrations of MCs in groundwater samples. Mass spectrometry provides reliable confirmation of MCs and a means to identify unknown compounds that are potential false positives for methods with UV and other non-selective detectors. Published by Elsevier Ltd.