用燃烧—碘量法测定钢铁中硫时,据有关文献报导,均系在通氧情况下,用碘标准溶液滴定含有淀粉的水溶液,操作时务使溶液之浅蓝色在滴定过程中不消失;又不能使蓝色太深,否则二氧化硫或碘会逸出,致使结果偏低或偏高。但是,站在生产第一线的上钢三厂敢于跳出书本框框,敢于实践,通过试验证明:在通氧燃烧完毕后滴定或滴定过程中溶液蓝色消失或加深,其结果均一致。 Determination of sulfur in steel by burning - iodometry, according to the literature, are in the case of oxygen, with iodine standard solution titration aqueous solution containing starch, the operation should be so that the solution of light blue in the titration process does not disappear; Do not make the blue too deep, or sulfur dioxide or iodine will escape, resulting in low or high results. However, on the front line of the production of the first three steel plant dare to jump out of the book box, dare to practice, proved by experiment: after oxygen combustion titration or titration solution blue disappeared or deepened solution, the results are the same.