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目的:研究肌酐较正—碱性硼氢化钾还原—冷原子吸收光谱法测定汞的方法。方法:尿样以硼氢化钾还原,在253.7 nm波长下,读取最大峰值。根据标准系列峰值与浓度的线性关系,经肌酐较正计算样品中汞的浓度。结果:尿汞在2.0～180μg/L的范围内,检测浓度与峰值呈直线相关关系,回归方程Y=2.86×103x+16.9,最低检出浓度为2.0μg/L,精密度0.377%～1.82%,回收率91.1%～104.0%,尿汞浓度须经肌酐较正。结论:方法快速简便,精密准确,适用于大批量样品的现场分析。
OBJECTIVE: To study the method for the determination of mercury by creatinine more positive-basic potassium borohydride reduction-cold atomic absorption spectrometry. Methods: Urine samples were reduced with potassium borohydride and the maximum peak was read at 253.7 nm. According to the standard series of peaks and the linear relationship between the concentration of creatinine more correct calculation of mercury in the sample concentration. Results: The urinary mercury was in the range of 2.0-180 μg / L. The correlation coefficient was linear with the peak value. The regression equation was Y = 2.86 × 103x + 16.9. The minimum detectable concentration was 2.0 μg / L and the precision was 0.377% -1.82% , The recovery rate of 91.1% ~ 104.0%, urinary mercury concentration to be corrected by creatinine. Conclusion: The method is rapid, simple, accurate and accurate and can be applied to on-site analysis of large quantities of samples.