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产品名称: CODmn COD锰法测定装置


型号:CODmn


价格:

产品介绍

滴定法:

1. 三角烧瓶预处理方法 :取50ml去离子水于250ml三角烧瓶中,加COD锰法试剂Ⅰ1ml,加入COD锰法试Ⅱ1.5ml放在水浴锅(100℃)煮沸15分钟,取出三角烧瓶用COD锰法试剂Ⅲ滴定至微红色,将溶液倒掉。(两个三角烧瓶都要预处理)。

2.取100ml水样于三角烧瓶中,加COD锰法试剂Ⅰ5ml,加入COD锰法试剂Ⅱ10ml,放在沸腾的水浴锅中煮沸30分钟。

3.取下三角烧瓶趁热加入COD锰法试剂Ⅲ10ml,摇匀使红色褪尽,用COD锰法试剂Ⅱ滴定,滴定至溶液呈微红色, 记录下COD锰法试剂Ⅱ滴定的用量V1(ml)。


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