本文对简便血清CO_2滴定法(草酸滴定法,下称原法)标准液浓度和指示剂作了改进,结果满意,介绍如下: 材料与法方原理:以溴甲酚紫为指示剂,用适当浓度的草酸标准液直接滴定血清中的碳酸氢盐,同时放出CO_2。当碳酸氢盐被完全反应后,溶液即由紫红色变为黄色,表明滴定终 In this paper, simple serum CO 2 titration method (oxalate titration method, hereinafter referred to as the original method) standard solution concentration and indicator improved, the results are satisfactory, described as follows: Material and the French side principle: bromocresol purple as an indicator, with appropriate Concentration of oxalic acid standard solution of direct titration of bicarbonate in serum, while releasing CO_2. After the bicarbonate was completely reacted, the solution turned from magenta to yellow, indicating the titration was completed