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一方法要点在0.1～2N 的盐酸溶液中,锆与槲皮素生成溶于乙醇或丙酮的黄色络合物,借此进行比色测定。Fe~(3+)的干扰,可加入抗坏血酸消除。在锆显色的酸度下,以 EDTA 掩蔽锆后,而不再与槲皮素显色以此体系作参比,可消除 Sn~(4+)的干扰。Cu~(2+)不干扰测定。本方法适用于测定铝合金中0.1～0.5%的化合锆。二试剂EDTA:0.02M 溶液,称取该试剂7.6克,用200毫升水溶解后,再以水稀释到1000毫升。0.05%的槲皮素乙醇溶液(用时新配):称取槲皮素0.25克,溶于200毫升乙醇中,过滤于500毫升量瓶中,以乙醇稀释至刻度,摇匀。锆标准溶液的配制:称取光谱纯氯氧化锆(Zr-OCl_2·8H_2O)0.03534克,溶于少量水中后,用1.2N的盐酸稀释到100毫升量瓶中,摇匀。每毫升溶液含
One method points in 0.1 ~ 2N hydrochloric acid solution, zirconium and quercetin generated in ethanol or acetone yellow complex, whereby the colorimetric determination. Fe ~ (3 +) interference, ascorbate can be added to eliminate. Under the chromogenic acidity of zirconium, the interference of Sn 4+ can be eliminated by masking the zirconium with EDTA rather than with quercetin. Cu ~ (2+) does not interfere with the determination. This method is suitable for the determination of aluminum 0.1% to 0.5% zirconium compound. Two reagents EDTA: 0.02M solution, weighed 7.6 grams of the reagent, dissolved in 200 ml of water, and then diluted with water to 1000 ml. 0.05% quercetin ethanol solution (with the new time): Weigh quercetin 0.25 grams, dissolved in 200 ml of ethanol, filtered in 500 ml volumetric flask, diluted with ethanol to the mark, shake. Preparation of zirconium standard solution: Weigh 0.03534 g of pure zirconium oxychloride (Zr-OCl 2 · 8H 2 O) solution, dissolve in a small amount of water, dilute to 100 ml with 1.2N hydrochloric acid and shake well. Per ml of solution containing