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燃烧法测定钢铁中含硫量是机械工厂较为常用的方法。其所用之淀粉溶液常由于时间长、天气热,微生物迅速繁殖而变质.理化检验-化学分册虽介绍几种淀粉防腐剂,有HgI_2、“尼伯金”硼酸等。它们在使用过程中虽然可起防腐作用,但各有其不足之处,如HgI_2有毒,硼酸的效果不太好,尤其在夏天也易变质。卡松(美国商品名Kathon CG)是美国食品与药物管理局(FDA)批准使用的化妆品防腐剂,其有效成份为“5-氯-2-甲基-4-异噻唑啉-3-酮”与“2-甲基-4-异噻唑啉-3-酮。”我国国家标准GB7916—87已批准其
Burning method for the determination of sulfur content in steel is a more commonly used method in mechanical plants. Often used in starch solution due to a long time, the weather is hot, rapid microbial deterioration and phytochemical - chemical composition Although the introduction of several types of starch preservatives, HgI_2, “Nibin ” boric acid. Although they can play a preservative effect in the course of use, but each has its own shortcomings, such as HgI_2 toxic, boric acid is not very good, especially in the summer also metamorphism. Casson (US trade name Kathon CG) is a cosmetic preservative approved by the U.S. Food and Drug Administration (FDA) and its active ingredient is “5-chloro-2-methyl-4-isothiazolin-3-one ”And “ 2-methyl-4-isothiazolin-3-one. ”China’s national standard GB7916-87 has approved its