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BTAN(6-bromo-2-benzothiazolylazo-2-naphthol)为对镉有高灵敏度和高选择性的萃取比色试剂,可以做成凝胶柱来测定镉,其定量之准确度和灵敏度均佳。 BTAN树脂制法:以0.02%BTAN氯苯溶液10 ml,加入干燥的苯乙烯树脂1.3 g,在冷暗处密封放置24小时,使树脂膨润凝胶化后,将内容物倒入有尼龙网筛的分离管中,3,000 rpm离心3分钟,除去过剩的BTAN溶液,得到红色的BTAN凝胶粒子约4 g,1 g乾燥树脂约吸收3mlBTAN氯苯溶液。 BTAN柱的制备:柱长120 mm、内径2.5 mm,用硬质玻璃管制成,每隔1mm有一刻度。柱下端以海绵状聚氯乙烯塞住,装置在吸引瓶上,上面接一圆筒状漏斗。将凝胶树脂
BTAN (6-bromo-2-benzothiazolylazo-2-naphthol) is an extraction colorimetric reagent with high sensitivity and selectivity to cadmium. It can be used as a gel column for the determination of cadmium. Its accuracy and sensitivity are good. BTAN resin preparation method: 10 ml of 0.02% BTAN chlorobenzene solution was added to dry styrene resin 1.3 g, sealed and placed in cold and dark place for 24 hours, the resin was swelled and gelled, and the contents were poured into a nylon mesh screen Centrifuge at 3,000 rpm for 3 minutes to remove excess BTAN solution to obtain about 4 g of red BTAN gel particles and about 1 g of dry resin to absorb about 3 ml of TBAN chlorobenzene solution. Preparation of BTAN column: The column length is 120 mm and the inner diameter is 2.5 mm. It is made of a rigid glass tube and has a graduation every 1 mm. The lower end of the column was stuffed with caustic PVC, the device was placed on the suction bottle, followed by a cylindrical funnel. Will gel resin