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研究了三元络合体系汞－硫氰酸盐－罗丹明Ｂ显色体系测定汞的最佳条件，得到该体系最大吸收波长为６１０ｎｍ，表现摩尔吸光系数为１．６６×１０￣５，汞的浓度在０～５０μｇ／５０ｍｌ范围内遵守比尔定律，用本方法可直接在水相中测定微量汞
The optimal conditions for the determination of mercury by the ternary complex system of mercury-thiocyanate-rhodamine B were studied. The maximum absorption wavelength of this system was 610 nm and the molar absorption coefficient was 1.66 × 10 ~ 5. Mercury Beer’s law is obeyed in the range of 0 ~ 50μg / 50ml. With this method, the trace mercury can be measured directly in the aqueous phase