人尿中微量铬的测定,过去用比色法和火焰原子吸收光谱法测定,干扰大,测定误差也大。有时还需要复杂的萃取浓缩等预处理。本文采用HNO_3-H_2O_2湿法消解,经高锰酸钾氧化,采用石墨炉—原子吸收光谱法测定。仪器操作条件由微机控制,测试结果自动打印输出,取得了较为满意的效果。本法有较高的灵敏度及测试精度,优于其它铬的分析方法。 Determination of human urine trace chromium, the past colorimetric and flame atomic absorption spectrometry, interference, determination of error is also large. Sometimes, complex preconditioning such as extraction and concentration is required. In this paper, HNO_3-H_2O_2 wet digestion, the potassium permanganate oxidation, using graphite furnace atomic absorption spectrometry. Instrument operating conditions controlled by the computer, the test results automatically print output, and achieved more satisfactory results. This method has a higher sensitivity and test accuracy, better than other methods of chromium analysis.