头发中钙的沸水浴消解火焰原子吸收测定法

目的建立一种简便的火焰原子吸收法测定头发中钙的方法。方法采用沸水浴法将头发消解后用硝酸镧溶液定容,用火焰原子吸收法测定。结果火焰原子吸收法测定头发中钙相对标准偏差为1.27%～1.72%,回收率为95.24%～103.52%,检出限为0.012μg/L。结论火焰原子吸收法测定头发中钙简便,检出限低,精密度和准确度高,可作为测定头发中钙的方法。

Determination of calcium in hair by boiling bath digestion-flame atomic absorption spectrometry

Objective]To establish a simple method for determination of calcium in hair by flame atomic absorption spectrometry.Methods]The hair samples were digested with boiling bath method,the lanthanum nitrate solution was applied for constant volume,and the flame atomic absorption spectrometry was performed for detection.Results]The relative standard deviation was 1.27%-1.72%,the recovery rate was 95.24%-103.52%,and the detection limit was 0.012 μg/L.Conclusion]The flame atomic absorption spectrometry for detecting the calcium in hair is simple,and has the advantages of low detection limit,high precision and accuracy,which can be used to determine the calcium in hair.