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试样准备
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试样准备
Encyclopedia
理学
【试剂和试样】
释
methods of sampling
试样准备
包括取样和试样制备两步。前者是指从大量物料(分析对象的总体)中取得其中有代表性的一小部分,即在误差允许范围内,这一小部分试样应能代表大量物料的组成。后者是把按一定程序取得的仍然颗粒较大的试样,经过破碎、缩分、研磨、过筛等步骤,制备成适合于作分析用的试样。
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