低温合金中锑的测定,目前通常采用萃取光度法,一般测定范围较低,在溴酸钾或硫酸铈测定中,使用甲基橙或甲基红不可逆指示剂,测定繁琐,重现性较差。最近使用二苯胺类衍生物及某些染料作为可逆指示剂的测定已有报导,并提出以二价铁盐或锰盐作为催化诱导物质。可加速滴定反应,但测定中要进行空白校正。 Determination of antimony in cryogenic alloys, the current commonly used extraction spectrophotometry, the general range of lower determination of potassium bromate or cerium sulfate determination, the use of methyl orange or methyl red irreversible indicator, determination cumbersome, poor reproducibility. Recent measurements using diphenylamine derivatives and certain dyes as reversible indicators have been reported, and the use of ferrous salts or manganese salts as catalytic inducers has been proposed. Titration reaction can be accelerated, but the determination of blank correction.