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近年来,极谱阳极溶出法在测定痕量金属方面的应用愈来愈广泛,所使用的电极种类也很多。本篇报导在铂球上直接真空镀汞膜的电极。这种电极适用于微量金属阳极液出法的测定。 1.电极的制备方法:取铂丝长约20mm,用金相抛光砂纸打光,用1:1热HNO_3浸泡5分钟,再用王水煮3分钟,去掉铂丝表面氧化膜取出后用蒸溜水洗净。然后烧制成不同直径的圆球。取一直径为6mm长约100mm的软质玻璃管,一头拉成尖端,然后将烧好的铂球封置在玻璃管内,令圆球
In recent years, polarographic anodic dissolution method in the determination of trace metals is more and more widely used, there are many types of electrodes. This article reports directly on the platinum ball vacuum mercury film electrode. This electrode is suitable for the determination of trace metal anode liquid method. 1. Preparation of electrode: take platinum wire about 20mm long, polished with metallographic polishing sandpaper, soaked with 1: 1 hot HNO 3 for 5 minutes, then boiled for 3 minutes, remove the oxide film on the surface of the platinum wire, Wash with water Then firing it into balls of different diameters. Take a diameter of 6mm long about 100mm soft glass tube, one pulled into the tip, and then the good platinum balls sealed in the glass tube, so that the ball