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目前,分光光度测定硫化物多用亚甲基兰法,此外尚报道了汞一二苯卡巴肼、氯冉酸汞、二氨基二硫代甲酸铜、硫代乙酸丙酮钯、硫代噻吩甲酰三氟丙酮铜和银——邻菲咯啉——溴邻苯三酚红等方法.Bathophenanthroline(向红菲咯啉,简写Bathophen)对Fe(Ⅱ)的颜色反应灵敏度高,选择性好,可以在Fe(Ⅲ)存在下直接测定Fe(Ⅱ).在实验中,我们注意到,S~(2-)能定量还原Fe(Ⅲ)为Fe(Ⅱ).本文首次提出以Fe(Ⅱ)—Bathophen 显色间接分光光度测定硫化物,并研究了测定的适宜条件及排除干扰的方法.相对于硫化物的表现摩尔吸收系数为4.2×10(?),比现行的标准亚甲兰法更加灵敏、稳定,用于废水中硫化物的测定,获得较满意的结果.
At present, the spectrophotometric determination of sulfides is more commonly used methylene blue method. In addition, mercury-diphenylcarbazide, mercuric chloride, copper diaminodithiocarboxylate, palladium palladium thioacetate, thiothioyl tris Fluorocarbon copper and silver - phenanthroline - Bromopyrogallol red and other methods.Bathophenanthroline (bathophen red bath phenanthroline) on the Fe (Ⅱ) color reaction sensitivity, good selectivity, you can in Fe (Ⅲ) in the presence of Fe (Ⅱ) .In the experiment, we note that S ~ (2-) can be reduced Fe (Ⅲ) to Fe (Ⅱ) .This paper for the first time proposed Fe (Ⅱ) -Bathophen The colorimetric indirect spectrophotometric determination of sulfide, and to determine the appropriate conditions for the determination and the method of interference.Compared with the sulfide performance of the molar absorption coefficient of 4.2 × 10 (?), Than the current standard methylene blue method is more sensitive, Stable, for the determination of sulfide in wastewater, get more satisfactory results.