本文报导二价锡的恒电流库仑滴定法,铁粉作还原剂,并利用铁粉溶解后所形成的二价铁作发生电解质,直接在阳极电解产生的三价铁为库仑滴定剂。本法的选择性较高,除钛外,少量的钨、铜及大量的鈷、铪、铬、铁、锰、镍、钴、镁、铝、铅、希土等十余种共存元素不干扰测定。曾用于锆合金中锡的测定,获得了较满意的结果。方法亦较简便、快速。 This article reports the constant current coulometric titration of divalent tin, using iron powder as the reductant, and using divalent iron formed by the dissolution of iron powder as the electrolyte to produce ferric iron directly as the coulometric titrant. In addition to titanium, a small amount of tungsten, copper and a large amount of more than ten coexisting elements of cobalt, hafnium, chromium, iron, manganese, nickel, cobalt, magnesium, aluminum, lead, Determination. Have been used for determination of tin in zirconium alloys, obtained more satisfactory results. The method is also relatively simple and fast.