To remove main disturbing ion, chlorine ion in the COD potassium dichromate reflux method, silver sulfate replaces mercury sulfate as a screening agent.
对cod重铬酸钾回流法中的主要干扰离子，氯化物的消除，选择了用硫酸银代替硫酸汞做掩蔽剂。
The method shows the advantages of simple operation, less pollution, high analytical speed, better accuracy and precision over the traditional potassium dichromate oxidation method.
与重铬酸钾氧化法的结果相比，微波消化法具有操作简单、污染小、快速准确的优点。
In view of the detrimental effect of mercury and chromium in determination of iron by means of dichromate titration, a new method was proposed containing no mercury and chromium.
针对重铬酸钾法测定铁含量中汞和铬的有害影响，介绍了一种无汞无铬测定法。
In this paper, authors report a method of determination of the essential oil content in natural flavour spices with only small quantities of the spices, oxidized method with potassium dichromate.
本文提出了使用少量样品准确地测定天然调味香料中精油含量的方法——重铬酸钾氧化法。
In this paper, authors report a method of determination of the essential oil content in natural flavour spices with only small quantities of the spices, oxidized method with potassium dichromate.
本文提出了使用少量样品准确地测定天然调味香料中精油含量的方法——重铬酸钾氧化法。
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