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-化學(xué)工程與工藝-本文采用氧化還原滴定法與絡(luò)合滴定法對鍍六價鉻的廢水中鉻酸酐红牛影视AV在线地址，三氧化二鉻，鐵和硫酸根的含量進(jìn)行了測定：鉻酸酐和三氧化二鉻用碘量法測定精品国内在线，鉻酸酐的變異系數(shù)為0.056%囯产激清黄色网，加標(biāo)回收率為99.82-99.83%，三氧化二鉻的變異系數(shù)為1.45%，加標(biāo)回收率為98.55-99.26%国产69精品久久久久9999不卡；鐵用絡(luò)合滴定法測定男女18禁啪啪无遮挡激烈动态图红，其變異系數(shù)為1.73%，加標(biāo)回收率為99.12-99.23%久久久久久久精品国产免；硫酸根用絡(luò)合返滴定法測定人人澡人人看人人摸，其變異系數(shù)為0.16%，加標(biāo)回收率為

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The catalytic activity of iodine in the esterification reaction was studied by synthesis cyclohexyl acetate from acetic anhydride,cyclohexano and acetic acid,cyclohexano.

以單質(zhì)碘為催化劑色色影视网站，通過乙酸酐、環(huán)己醇及乙酸97人人爽人人添天天爽、環(huán)己醇為原料合成乙酸環(huán)己酯国产高潮动漫在线观看免费视频，對碘的催化活性進(jìn)行了研究。

iodic anhydride：碘酸酐

iodic acid 碘酸 | iodic anhydride 碘酸酐 | iodide 碘化物

permanganic acid：過錳酸

過碘酐;七氧化二碘 periodic anhydride | 過錳酸 permanganic acid | 過錳酸酐;七氧化二錳 permanganic anhydride