原子吸光法による尿中クロムの定量

概要

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Determination of chromium in human urine by flame and flameless atomic absorption method was studied. A urine sample(50ml) was digested with 1ml of HNO_3 and 1 ml of H_3O_2 in a 100 ml Kjeldahl flask, then diluted to 25 ml. Chromium more than 10 ppb in original urine could be determined by flame atomic absorption at 357.9nm by utilizing 352.6 nm line of cobalt hollow cathode lamp for the background correction. Flameless atomic absorption measurement was adopted for the samples of chromium concentration less than 10 ppb. Ashing at about 1000℃ before the atomization was found to eliminate the effect of NaCl or other salts on chromium absorption. Concentrations of chromium were determined for the urine of 69 people, who had been the employees of Nihonkagaku-Kogyo Ltd., and suffering from chromium injury. The concentration of chromium in these urine samples was found to be not so much different from those of normal people, which indicates that the concentration of chromium in urine should be used with care as the index of chromium injury caused by the past exposure.
社団法人日本分析化学会の論文
1977-05-05