微波消解-火焰原子吸收法测定海星中重金属

摘要

The best working conditions of atomic absorption spectrometry to determine Cu, Fe, Mn, Zn were investi- gated including microwave digestion, carrier gas flow ratio, and burner height. The optimum instrument parameters were selected, good linearity of the calibration curves was abtained for all target elements （ r = 0. 9990 - 0. 9999）. The results showed that the recovery of additional standard（ n = 3 ） was 93.6% - 115.6% , and RSD was lower than 5%. The method was accurate and precise.%考察了测定铜、铁、锰、锌元素时的原子吸收的最佳工作条件，包括微波消解条件、燃气流量比、燃烧器高度的选择，得到了火焰法原子吸收测定铜、铁、锰、锌的最佳条件。在试验浓度范围内，各元素的线性关系良好（r=0．9990～0．9999），方法的加标回收率（n：3）在93．2％～114．3％之间，RSD小于5％。该方法的精密度和准确性良好。