碘氧化滴定

Chromic trioxide and chromium hemitrioxide are determined with iodometry, the coefficient of variation of chromic trioxide is 0.056%, and the recovery of marked compound is 99.82-99.83%; the coefficient of variation of chromium hemitrioxide is 1.45%,and the recovery of marked compound is 98.55-99.26%; iron is determined by complexometric titration, the coefficient of variation of iron is 1.73%, and the recovery of marked compound is 99.12-99.23%;sulfate is determined by complexometric titration, the coefficient of variation of sulphate is 0.16%, and the recovery of marked compound is

Analysis Of The Chromium Electroplating Wastewater By Oxidation-reduction And Complexometric Titration-化学工程与工艺-本文采用氧化还原滴定法与络合滴定法对镀六价铬的废水中铬酸酐，三氧化二铬，铁和硫酸根的含量进行了测定：铬酸酐和三氧化二铬用碘量法测定，铬酸酐的变异系数为0.056%，加标回收率为99.82-99.83%，三氧化二铬的变异系数为1.45%，加标回收率为98.55-99.26%；铁用络合滴定法测定，其变异系数为1.73%，加标回收率为99.12-99.23%；硫酸根用络合返滴定法测定，其变异系数为0.16%，加标回收率为

In this article, a new analytical method for determination of the content of active manganese dioxide left in waste Zn-Mn battery was proposed by iodimetry combined with potential titration. The influence of reaction time, temperature and the quantity of potassium iodide were investigated.

本文提出结合电位滴定技术用碘量法测定废旧锌锰干电池锰粉中剩余活性二氧化锰含量的新方法，对方法中反应时间、温度、碘化钾用量等影响因素进行试验，确定了最优实验条件。

After the solution was kept in the dark for five minutes,chloroform was added into it to adsorb selenium formed by previous reaction,then iodine separated out was determined by sodium hyposulfite titration using starch as the indicator,at last the content of selenium dioxide in the sample was foun.

在溶有二氧化硒的0.4～0.5mol/L盐酸介质中，加入过量的碘化钾，于暗处放置5min后，加入三氧甲烷吸附反应生成的硒，以淀粉为指示剂，用硫代硫酸钠标准溶液滴定析出的碘，测得二氧化硒的含量。

The graphite and acetylene black are added to a anode material in making Zn-Mn battery, therefore the sample solution prepared appears as feculency and the titration end point of the solution is difficult to judge when active manganese in the battery is determined by iodimetry with starch as a indicator.

在测定锌锰干电池锰粉中活性二氧化锰含量时，由于制备电池时正极锰粉中添加了乙炔黑、石墨等导电材料，使制得的样品溶液显色且混浊，影响用淀粉作为指示剂进行碘量法滴定终点的判断。

Iodine, however, is not added in the form of a volumetric solution but is produced in an iodide-containing solution by anodic oxidation.

然而，碘不是以滴定溶液的形式加入，而是通过阳极氧化含有碘化物的溶液生成的。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了