ISO 2227:1972 工业用甲醛溶液.甲醛含量的测定

标准编号：ISO 2227:1972

中文名称：工业用甲醛溶液.甲醛含量的测定

英文名称：Formaldehyde solutions for industrial use — Determination of formaldehyde content

发布日期：1972-12

标准范围

规定的方法适用于HCHO含量在25.5%至45%之间的情况。可通过改变试验部分的质量来扩展应用范围。其原理在于试验溶液与中性亚硫酸钠溶液反应，并在胸腺酚酞作为指示剂的情况下对释放的氢氧化钠进行酸滴定。

The specified method is applicable to HCHO contents between 25 5 and 45 %. The field of application may be extended by siutably modifying the mass of the test portion. The principle consists in the reaction of the test solution with a neutral sodium sulphite solution, and acidimetric titration of the liberated sodium hydroxide in presence of thymolphthalein as indicator.

标准预览图