摘要
为对半挥发性有机化合物标准物质的正确使用提供指导，选用美国ChemSevice公司生产的PPH-10RPM“甲醇中16种多环芳烃混合标准物质”，将其分装于2mL聚四氟乙烯衬盖棕色螺口样品瓶中于-18℃避光贮存，采用气相色谱-火焰离子化检测器方法测试各个特性量值随贮存时间的变化。结果表明，标准物质各个特性量测量的标准偏差在0．3—4．0μg/mL，最大相对标准偏差为3．92％。在置信度为95％时，Х^2-检验表明测试结果的精密度适当，评价的测试方法可行；标准物质各特性量值在（100．0±7．2）μg／mL时，测量的偏差不显著。分装后的标准物质至多可保存80天，具体的保存期限还应结合标准物质所剩的有效期确定。
In order to offer guidance on correctly using certified reference materials （CRMs） of 16 polycyclic aromatic compounds （PAHs） in methanol （named PPH-10RPM） manufactured by ChemServiee Co. Ltd in application of PAHs analysis, stability of CRMs in opened stocks was tested by gas chromatography with a flame ionization detector （GC/FID）. The CRM was transferred into 2 mL brown bottles equipped with Teflon-lined screw-caps, stored with minimal headspace and protected from light at - 18 ℃ for 123 days. The variation of property values of the CRMs with storage time was determined. The results showed that the standard deviations of all the property values ranged from 0.3 - 4.0 μg/mL and the maximum relative standard deviation was 3.92%. In the 95% confidence level, the chi-squared test （Х^2-test） showed that precision of the measurements was acceptable and indicated the evaluation method was feasible and reliable. In addition, the measurement deviation was not significant when the range of property values of the CRMs were within （100.0 ±7.2）μg/mL. The experiment data also showed that the preservation period of the CRMs for opened stocks was up to 80 days and the period of validity of the CRMs should be considered.
出处
《岩矿测试》
CAS
CSCD
北大核心
2010年第2期109-112,共4页
Rock and Mineral Analysis
基金
地质调查工作项目--地下水有机污染物分析技术研究项目资助(1212010634607)
水体污染控制与治理科技重大专项--地下水源城市饮用水安全保障共性技术研究与示范项目资助(2009ZX07424-002)
关键词
标准物质
多环芳烃
时效性
certified reference material （CRM）
polycyclic aromatic hydrocarbon （PAH）
validity of time
