正文：铬酸钡（冷）法测定硫酸根的原理与检测要点分析 关键词】铬酸钡冷法；硫酸根；原理；检测要点 [gap=439]Keywords: Chromium acid barium cold method; Sulfate radical; Principle; Detection points
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sulfate radical anion 硫酸根自由基
sulfate radical ion 指出硫酸根离子
sulfate radical content 硫酸根含量
measuring sulfate radical 硫酸根测定
sulfate radical polysaccharide 硫酸酯多糖
sulfate radical anion method 硫酸根自由基
The sulfate radical ion (SO42-) has two actions in concrete: exciting FC admixture and corroding concrete.
指出硫酸根离子（SO42 -）在混凝土中起到了激发FC掺和料及腐蚀混凝土的双重作用。
Results the polysaccharides with molecular weight from 5000 to 40000 were prepared and the content of sulfate radical was above 18.5%.
结果制备了相对分子质量为5000 ~ 40000的硫酸多糖，其硫酸基含量均在18.5%以上。
With the rise in potential, the iron-depleted sulfide continues the oxidation and finally occurs in the solution in form of sulfate radical.
随着电位的升高，缺铁硫化物继续氧化，最终以硫酸根形式于溶液中。
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