液化天然气中微量汞的分析方法探讨

Discussion on Analysis Method of Trace Mercury in Liquefied Natural Gas

建立了一种液化天然气（ LNG）中微量汞的检测方法。运用高锰酸钾溶液吸收LNG中的微量汞，原子荧光法测定吸收液中汞含量，标准曲线法定量。结果：汞线性关系和重现性良好，回收率在91．6％～96．4％之间，检出限达0．003μg／m3。结论：该方法具有准确、快捷等优点，运用该方法分析了24份LNG样品，得到了满意的结果。

The liquefied natural gas （ LNG） in the detection method of trace mercury was established.The use of potassium permanganate solution, trace mercury in LNG was absorbed and mercury content in liquid absorption atomic fluorescence method was determined by quantitative standard curve method. Mercury was with good linearity and reproducibility, the recovery was 91.6% ~96.4%, and the detection limit was 0.003 g/m3.The method had the advantages of accurate, fast and so on.Using the method of 24 LNG samples, satisfactory results were obtained.