Inter-Laboratory Studies for the Validation of Solid-Phase Microextraction for the Quantitative Analysis of Volatile Organic Compounds in Aqueous Samples.
Inter-Laboratory Studies for the Validation of Solid-Phase Microextraction for the Quantitative Analysis of Volatile Organic Compounds in Aqueous Samples.
复制标题
固相微萃取定量分析水样中挥发性有机化合物的实验室间研究。
DOI：
10.1016/s0003-2670(97)00526-6
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发表时间：
1997
影响因子：
6.2
通讯作者：
S. Facchetti
中科院分区：
文献类型：
--
作者：
T. Nilsson;R. Ferrari;S. Facchetti
20个实验室参与了实验室间研究，目的是验证一种新的标准方法，使用固相微萃取（SPME）定量分析水样中的挥发性有机化合物（VOCs）。根据ISO标准，对SPME的准确度和精密度进行了统计学评价，该标准涉及基于参考物质的实验室间研究，并与通常的吹扫-捕集和静态顶空技术进行了比较。与SPME标准和参考方法相比，重复性，再现性和准确度。从水相上方的小顶空中提取，SPME的精度比浸入水中的纤维更好。在所有情况下线性良好，检测限在低ng/l范围内。因此，它的结论是，固相微萃取是一个有效的替代技术，用于分析挥发性有机化合物在各种水样中的痕量水平。
Inter-laboratory studies were organised with the participation of twenty laboratories for the purpose of validation of a new standard method using solid-phase microextraction (SPME) for the quantitative analysis of volatile organic compounds (VOCs) in aqueous samples. The statistical evaluation of the accuracy and precision of SPME was performed in accordance with the ISO standard concerning inter-laboratory studies on the basis of reference material and by comparison with the usual purge-and-trap and static headspace techniques. Comparable repeatability, reproducibility and accuracy were found with the SPME standard and the reference methods. Better precision of SPME was obtained by extraction from a small headspace over the aqueous phase than with the fibre immersed in water. The linearity was good in all cases and detection limits were in the low ng/l range. Thus, it is concluded that SPME is a valid alternative technique for the analysis of VOCs at trace level in various aqueous samples.