Abstract:

Adrop counting analysis has been made to determine the chloride ion content in water by using a home-made polyethylene capillary burette whose volume per drop is 0.01- 0.02 mL. Its main apparatus is characterized by small in shape, convenient to be carried, rapid and accurate titration. The reagent consumption is about 5% of the quantity by ordinary method. The titration dosage is about 20~100 drops. The uncertainty Urel (C) of chloride ion is 3.03%, a bit smaller than that of ordinary method. Its relative standard deviation corresponds to that of ordinary method. It has overcome the inconvenience in carrying burette, liquid moving pipe, iron holder, butterfly clamp, etc. used in ordinary analysis. Therefore, it is suitable for rapid analysis of chloride ion content in water.

Key words: capillary burette, micro titration, chloride ion, water quality analysis

摘要：

以自制的液滴体积为0.01～0.02mL的聚乙烯毛细滴管对水中氯离子含量进行数滴分析,其主要仪器外形小巧、便于携带,滴定快速、准确,试剂消耗量约为常量法的5%,滴定剂用量约为20～100滴,氯离子含量不确定度Urel(C)为3.03%,比常量法略小,相对标准偏差与常量法的相当。该法克服了常量法中滴定管、移液管、铁架台和蝴蝶夹等仪器携带不方便的不足,适用于水中氯离子含量的快速分析。

关键词: 毛细滴管, 微型滴定法, 氯离子, 水质分析

CLC Number: 

• X832

• O655.21