火焰原子吸收分光光度法检测金属元素的方法验证

Flame Atomic Absorption Spectrophotometry to Detect Metal Elements Method Verification

摘要: 本文对火焰原子吸收分光光度法测定水质中钾、钠、铁元素方法的检出限、精密度、准确度进行方法验证，探讨火焰原子吸收分光光度仪测定水质中钾、钠、铁元素的可行性。结果表明，火焰原子吸收分光光度法测定水质中钾、钠、铁元素在0~500 mg/L的浓度范围内具有线性关系，相关系数均在0.999以上，检出限分别是0.02 mg/L、0.01 mg/L、0.03 mg/L，检出下限分别是0.08 mg/L、0.04 mg/L、0.12 mg/L，准确度、精密度结果符合《水质 钾和钠的测定 火焰原子吸收分光光度法》(GB 11904-1989)和《水质 铁、锰的测定 火焰原子吸收分光光度法》(GB 11911-1989)中的要求，故两种方法均满足实验室要求。

Abstract: In this paper, the detection limit, precision and accuracy of the method for the determination of potassium, sodium and iron in water by flame atomic absorption Spectrophotometer were verified, the feasibility of determination of potassium, sodium and iron in water by flame atomic absorption spectrophotometer was discussed. The results showed that flame atomic absorption spectrophotometry for the determination of potassium, sodium and iron in water had a linear relationship in the concentration range of 0 - 500 μg/L, and the correlation coefficients are all above 0.999, the detection limits were 0.02 mg/L, 0.01 mg/L, 0.03 mg/L, respectively, and the lower limits were 0.08 mg/L, 0.04 mg/L, 0.12 mg/L, respectively, the results of accuracy and precision meet the requirements of water quality, potassium and sodium determination, flame atomic absorption Spectrophotometer (GB 11904-1989) and water quality determination of iron and Manganese, flame atomic absorption Spectrophotometer (GB 11911-1989), therefore, the two methods both meet the requirements of the laboratory.