工业用氟氯化烃 酸度的测定 滴定法

[中文适用范围]： 适用于酸度为每公斤2摩尔至200摩尔一价酸的产品。 给出了两种程序：一种适用于液体产品（R11、R113 等），另一种适用于气体产品（R12、R22 等）。 其原理在于用水萃取酸。 在溴甲酚绿作为指示剂存在下，用标准容量的氢氧化钠溶液滴定水相中的酸。 附图显示了用于吸收常温下气态产物的酸的装置。 [外文原描述]： Applicable to products the acidity of which is between 2 mol and 200 mol of univalent acid per kg. Two procedures are given: one is applicable to liquid products (R11, R113, etc.) and the other one to gaseous (R12, R22, etc.). The principle consists in extraction of the acids by water. Titration of the acids in the aqueous phase with standard volumetric sodium hydroxide solution in the presence of bromocresol green as indicator. A figure shows an apparatus for absorption of acids for products which are gaseous at ordinary temperatures.