本文研究了硫酸钡在氨水溶液中与EDTA的反应条件，提出用EDTA滴定法测定三硝基间苯二酚中的硫酸。
This Paper studies the reaction conditions of the Barium Sulphate and EDTA in ammonia water solution and proposes to use EDTA titration to determine sulphuric acid in Trinitro-resorcinol.
结果表明：三种氯酚都能显著抑制黑碳对4-硝基苯酚的吸附；
The results indicated: The three kinds of chlorophenol all could significantly restrain the adsorption of 4-nitrophenol from water by black carbon;
结果表明，硝基酚三种异构体在该修饰电极上具有良好的灵敏度、选择性和稳定性。
It was indicated that the modified elect rode was possessed of high sensitivity, selectivity and stability.
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