什么是平行样?怎么做?
一、平行样
平行样又称平行双样,是指在环境监测和样品分析中,只包括两个相同子样的样品。
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二、平行试验
平行试验就是同一批号(炉号等)取两个以上相同的样品,以完全一致的条件(包括温度、湿度、仪器、试剂,以及试验人)进行试验,看其结果的一致性,两样品间的误差是有国标或其他标准要求的。其优点是防止偶然误差的产生。
三、精密度控制
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YONGDUOCIPINGXINGCEDINGJIEGUOJINXINGXIANGDUIPIANCHAJISUANDEJISUANSHI:
式中:x i —某一测量值;
x — DUOCICELIANGZHIDEJUNZHI。
n—CELIANGCISHU
YIZUCELIANGZHIDEJINGMIDUYONGBIAOZHUNPIANCHAHUOXIANGDUIBIAOZHUNPIANCHABIAOSHISHIDEJISUANSHI:
废水监测部分项目精密度控制指标
转自:环境监测实战,侵删。