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引言火焰原子吸收分析中最常采用的是校准曲线法。原子吸收分析的特点是干扰相对较少,所以容易配制绘制校准曲线用的校准溶液,有时使用只含待测元素的水溶液就能满足要求。但当遇有物理、化学、电离等干扰时,为消除干扰应使校准溶液的组成尽可能与试样溶液的组成一致。可是往往不易配制符合这一要求的校准溶液(尤其是分析试样的组成未知时),于是广泛采用着一种标准加入法。标准加入法须制备3～4份溶液,仍较繁琐,当试样量有限、分析元素的含量低
Introduction The most commonly used method of flame atomic absorption spectrometry is the calibration curve method. Atomic absorption analysis is characterized by relatively little interference, so it is easy to formulate a calibration curve for the calibration solution used, and sometimes only contains the test element of the aqueous solution to meet the requirements. However, in the event of physical, chemical, ionization and other interference, to eliminate interference should make the composition of the calibration solution as much as possible with the composition of the sample solution. However, it is often not easy to formulate a calibration solution that meets this requirement (especially when the composition of the analysis sample is unknown), so a standard addition method is widely used. Standard accession law to prepare 3 to 4 copies of the solution is still more cumbersome, when the sample is limited, the content of the analysis of elements is low