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以三异辛胺(二甲苯)液从盐酸介质中萃取锌,与大量镍分离。有机相以氢氧化钠液反萃,以盐酸中和反萃水液,直接配成1摩尔氯化钠底液,极谱测定。铬(Ⅵ)及大量铁(Ⅲ)干扰可在萃取时加抗坏血酸消除。含锌为0.1—14微克/毫升
Zinc was extracted from the hydrochloric acid medium with tri-isooctylamine (xylene) and separated from a large amount of nickel. The organic phase was back-extracted with sodium hydroxide solution, and neutralized with hydrochloric acid to back-extract the aqueous solution, directly dubbed 1 mole of sodium chloride solution and subjected to polarographic determination. Chromium (Ⅵ) and a large number of iron (Ⅲ) interference can be added in the extraction of ascorbate. Zinc is 0.1-14 μg / ml