冷蒸气原子吸收光谱法测定石脑油中汞含量

Determination of Trace Mercury Content in Naphtha by Cold Vapour-Atomic Absorption Spectroscopy

在过量的氯化亚锡还原石脑油中的汞至汞蒸气,用冷蒸气原子吸收光谱仪快速测定石脑油中汞含量。结果表明,汞含量在0—50μg/L范围内线形关系良好,r=0.999,RSD为1.48%—1.56%,回收率97.40%—101.0%。该法与UOP938-2000标准所测得结果一致。

Mercury vapour in the naphtha was reduced under reaction with more reductant Tin（ Ⅱ ）chloride and rapidly determined by cold vapour Atomic absorption spectroscopy. The linear range is 0-50μg/L with relative standard deviation of 1.48%-1.56% and regression coefficient of 0. 999,the recovery is 97.40%-101.0%. The result is in accord with UOP 938-2000.