火焰原子吸收光谱法和ICP - AES测定工作场所空气中多种金属元素的方法比较

目的 对工作场所空气中测定铬、铜、锰、镁、钠、镍、铅和钙的火焰原子吸收光谱法和电感耦合等离子发射光谱法（ICP - AES）进行比较。方法 采用硝酸高氯酸（9∶1，v/v）消化滤膜，定容至10 ml，用火焰原子吸收光谱法和电感耦合等离子发射光谱法分别测定。结果 火焰原子吸收光谱法的各元素标准曲线相关系数r值＞0.996，检出限≤0.033，加标回收率为95.4%～109.0%，相对标准偏差为0.36%～1.92%；电感耦合等离子发射光谱法的各元素标准曲线相关系数r值＞0.998，检出限≤0.0054，加标回收率为95.9%～102.6%，相对标准偏差为0.47%～1.90%。 结论 2种方法均具有良好的线性、准确度和精密度，检测结果无统计学差异。

Comparison of flame atomic absorption spectrometry and ICP-AES for determination of metal elements in the air of workplace

Objective To compare the methods of flame atomic absorption spectrometry(FAAS) and inductively coupled plasma atomic emission spectrometry (ICP-AES) for determination of chromium, copper, manganese, magnesium, sodium, nickel, lead and calcium in the workplace air. Methods The sample in filter was digested with nitric acid-perchloric acid(9:1,v/v), then diluted to 10 ml, and finally determined by FAAS and ICP-AES, respectively. Results The correlation coefficients for FAAS were all ＞0.996, with the detection limits ≤0.033. The recovery rates of FAAS were in the range from 95.4% to 109.0%, and the relative standard deviations were in the range from 0.36% to 1.92%. The correlation coefficients of ICP-AES were all ＞0.998, with the detection limits ≤0.0054, and the recovery rates were in the range from 95.9% to 102.6%, and the relative standard deviations were in the range from 0.47% to 1.90%. Conclusion The two methods have good linearity, accuracy and precision. There are no significant differences between the detection results of the two methods.