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本文报道了用一种透明检测膜,快速半定量测定水中微量的铜(Ⅱ)、锌(Ⅱ)、镉(Ⅱ)、镍(Ⅱ)和钴(Ⅱ)。检测膜的制备:将10gTAC[2-(2-噻唑偶氮)-4-甲基酚]溶于8ml四氢呋喃和1.5ml磷酸三丁酯的混合液中,然后边混合,边滴加1g聚氯乙烯和2ml丙酮,混合后,摊开于玻璃板上,让四氢呋喃自然蒸发。将制得的膜(厚约0.3mm)切成1cm×1cm大小备用。定量操作:取一定量的中性水样于试管中,加1M的硝酸-氨缓冲液(pH8.5)0.3ml,
This paper reports the rapid and semi-quantitative determination of trace amounts of copper (Ⅱ), zinc (Ⅱ), cadmium (Ⅱ), nickel (Ⅱ) and cobalt (Ⅱ) in water using a transparent membrane. Preparation of test membrane: 10 g of TAC [2- (2-thiazolylazo) -4-methylphenol] was dissolved in a mixture of 8 ml of tetrahydrofuran and 1.5 ml of tributyl phosphate, and then mixed with 1 g of polychlorine Ethylene and 2 ml of acetone were mixed and spread out on a glass plate to allow the tetrahydrofuran to evaporate spontaneously. The resulting membrane (about 0.3 mm thick) was cut into 1 cm x 1 cm size for further use. Quantitative operation: Take a certain amount of neutral water in the test tube, add 1M nitric acid - ammonia buffer (pH8.5) 0.3ml,