商品漂水中的铁及其测定

Ferrum contained in commodity bleaching liquid and its determination

对商品漂水中铁的来源、性质及除去方法做了详细介绍 ,指出严格控制漂水中的铁含量是非常重要的 ,针对现行的次氯酸钠溶液的标准对含铁指标过宽以及准确性不高的问题 ,提出了修改意见 ,通过对显色原理、试剂及试验方法的改进 ,使新方法的检验准确性有明显的提高。

The sources,properties and removal of ferrum in commodity bleaching liquid are introduced in detail,and the importance to severely control content of ferrum is indicated.Modifications to the too relaxed index of content of ferrum and comparatively low determination accuracy in present hypochlorite solution standard are recommended.Determination accuracy are improved by the new method with improved chromogenic mechanism,reagent and test method.1\}g/mL for Ni(Ⅱ). For Ni(Ⅱ) concentration in the range of below 0.06mg/L, it obeys Beer\'s Law.Combined with solvent extraction separation with 2 hydroxy 4 s octoxyl benzophenoneoxime,the method has been applied to the determination of trace Ni in coal gangue with satisfactory results.\;Key words\ Nickel,Reductant form of Rhodamine B,Catalytic oxidizing chromogenic reaction,Spectrophotometry,Coal gangue