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催化极谱测定钨、钼,在引用二苯乙醇酸取代苦杏仁酸后,稳定性和灵敏度都大为改善。而面对成千上万化探试样的定量分析,应用流动型膜电极以避免汞毒害是很可取的。但是,钨、钼分开测量,速度太慢。我们试验了流动型膜电极法,在改善流动状况和统一钨、钼清洗液的同时,利用主机有较宽的电压扫描范围及自动取样,在同一份试液中完成钨、钼一次连续扫描记录。並且对钨、钼标准溶液的浓度、扫描速度和清洗润湿时间作了适当调整,使方法的稳定性、速度和灵敏度都大有改善。本法已成功地用于大批化探试样中钨、钼的测定。
Catalytic polarographic determination of tungsten, molybdenum, benzoic acid in the reference to the replacement of mandelic acid, the stability and sensitivity are greatly improved. In the face of the quantitative analysis of thousands of geochemical samples, it is advisable to use flow-type membrane electrodes to avoid mercury poisoning. However, tungsten and molybdenum are measured separately and are too slow. We tested the flow-type membrane electrode method, while improving the flow conditions and uniform tungsten and molybdenum cleaning fluid, using the host has a wide range of voltage scanning and automatic sampling, in the same test solution to complete a continuous scan of tungsten and molybdenum . And the tungsten, molybdenum standard solution concentration, scanning speed and cleaning wetting time made the appropriate adjustments, the stability of the method, speed and sensitivity are greatly improved. This method has been successfully used for the determination of tungsten and molybdenum in a large number of geochemical exploration samples.