直接测汞仪测定尿中的汞

[目的]建立尿中汞含量的直接测定方法。[方法]采用DMA80直接测汞仪测定尿中汞含量并与冷原子吸收法进行比较。[结果]该方法的线性范围为2．00～40．00μg／L，线性方程夕=0．019x＋0．006，r=0．9995，检出限为0．05ng，精密度试验相对标准偏差为2．2％～8．7％，加标回收率范围为97．5％～102．6％。[结论]该法与冷原子吸收分光光度法测定尿中汞含量结果相比较，差异无统计学意义。

Urine Mercury Determination by a Direct Analyzer

[ Objective ] To verify a direct urine mercury determination method with a standard methodology. [ Methods ] A direct mercury analyzer （DMA80） was compared with a standard cold atomic absorption spectrophotometry in urine mercury determination. [ Results ] The linear range of the DMA80 method was 2.0040.00 μL, the linear equation was y^ = 0.019x ＋ 0.006 （r= 0.999 5）, the detection limit was 0.05 ng, the relative standard deviations were 2.2%-8.7% and the recovery rates were 97.5%-102.6%. [ Conclusion ] In determine mercury in the same urine samples by the standard cold atomic absorption spectrophotometry and the direct analyzer, no significant difference is found. The direct analyzer could be applied in routine urine analysis.