石墨炉原子吸收光谱法测定生活饮用水中的镍

To Determine Ni in Drinking Water by Graphiteoven Atomic Absorption Spectrometric Method

目的建立有效的生活饮用水中镍的测定方法,了解生活饮用水中镍的含量。方法用1%磷酸二氢铵做基体改进剂,选择灰化温度和原子化温度,并用此条件对水样进行分析。结果灰化温度：600℃,原子化温度：2400℃;在0~20μg/L线性范围内,r=0.9985-0.9996,测得的最低检出浓度为0.92μg/L,准确度和精密度较高,符合检测要求。结论该法简单,易于操作,灵敏度高,重现性和回收率好,随机测得的水样中镍的含量均低于限值（0.02 mg/L）。

Purpose： To establish an effective method to determine Ni in drinking water. Method： To use 1 % ammonium biphosphate as the matrix modifier, to choose the temperature for cineration and atomization, and to analyze water sample by the same way. Result： Cineration temperature： 600 ℃, atomization temperature： 2400 ℃; within the linearity range of 0~20 μg/L, r=0.9985-0.9996, and the minimum detectable concentration is 0.92 μg/L; the accuracy and the precision are relatively high and it conforms to inspection requirements. Conclusion： The method is uncomplicated, with simple setting, strong sensitivity and good repeatability, as well as high recovery rate; the randomly determined Ni in water sample is lower than the limit value of 0.02 mg/L.