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目的对GB/T5750.8-2006中配制挥发性卤代烃标准溶液的方法进行改进,建立简单、准确的配制方法。方法用可密封的40mL通用标准螺纹口样品瓶代替100mL容量瓶称量,配制单标。在可密封的2.0mL样品瓶中用液液相加微量法配制混合标准使用液。结果用改进后的标准溶液配制方法参加苏浙沪实验室间比对、WS 201 PT ERA能力验证,均获得满意结果。用甲醇中挥发性卤代烃(I)GSB07-1403-2001产品编号332907标准物质核查,混合标准使用液在冷冻条件下(-18℃)至少可稳定2个月。结论此法试剂、器材易于获得,配制过程简单,甲醇消耗量少,检测结果准确,有推广价值。
Objective To improve the method of preparation of volatile halogenated hydrocarbon standard solution in GB / T5750.8-2006, and to establish a simple and accurate method for preparation. Methods Sealable 40mL universal standard screw mouth sample bottles instead of 100mL volumetric flask weighing, preparation of a single standard. Prepare mixed standard use solution in sealable 2.0mL vials by liquid-liquid microtiter method. Results With the improved standard solution preparation method to participate in the Jiangsu-Zhejiang-Shanghai laboratory comparison, WS 201 PT ERA proficiency testing, all obtained satisfactory results. Volatile halogenated hydrocarbons in methanol (I) GSB07-1403-2001 No. 332907 reference material verification, mixed standard solution at freezing conditions (-18 ℃) stable for at least 2 months. Conclusion This method reagents, equipment easy to get, the preparation process is simple, less consumption of methanol, the test results are accurate, with promotional value.