DIN EN ISO 7393-2 2019.03.01 Water quality - Determination of free chlorine and

匿名 发表于 2019-11-24 12:36:41 |阅读模式

DIN EN ISO 7393-2 2019.03.01 Water quality - Determination of free chlorine and total chlorine - Part 2: Colorimetric method using N,N-dialkyl-1,4-phenylenediamine, for routine control purposes (ISO 7393-2:2017); German version EN ISO 7393-2:2018

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