Objective to introduce the determination of the outer quality control sample in laboratory and the methods of uncertainty assessment for offering assistance in enhancement of laboratory level.
目的介绍铅的实验室外质控样的定值和不确定度的评定方法，为提高实验室的检测水平提供帮助。
Take an additional sample as a temperature control. Check the temperature of the control sample at the time of collection and on receipt at the laboratory.
拿一个额外的样品作为温度控制，检查采集温度控制样品的时间和实验室收样日期。
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