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当试样组成复杂、待测元素含量较低时，采用标准加人法比较好，因为此法能消除基体或干扰元素的影响（‘－‘）。标准加人法形式有多种，下面介绍此法在仪器分析中的几种应用。1标准加入法在原子吸收光谱法中的应用《3）如图1所示，将样品溶液（其浓度为Cx）将图2中Ax、A；两点
It is better to use the standard addition method when the sample composition is complex and the content of the element to be measured is lower because this method can eliminate the effect of matrix or interfering elements (’-’). There are a variety of standards to join the legal form, the following describes this method in the instrumental analysis of several applications. 1 Standard Addition Method in Atomic Absorption Spectrometry "3) As shown in Figure 1, the sample solution (the concentration of Cx) will Ax, A in Figure 2; two points