| 催化光度法测定环境样品中微量Hg的研究 |
| 摘要点击 683 全文点击 1069 投稿时间：1997-05-03 |
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| 中文关键词 催化光度法 水样 污泥样 微量汞 监测 |
| 英文关键词 catalytic spectrophotometry trace mercury determination sewage sample sludge sample |
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| 中文摘要 |
| 在酸性介质中,痕量Hg(Ⅱ)能显着催化空气中的O2氧化K4[Fe(CN)6],生成蓝色化合物,反应对Hg(Ⅱ)为一级,催化反应的表观活化能为62.95kJ·mol-1.据此建立了测定痕量Hg(Ⅱ)的动力学分析法,测定条件为K4[Fe(CN)6]:1.4×10-3mol·L-1,[CH3COOH]:0.14mol·L-1,75℃。在此条件下,线性测定范围为0.02-0.70μg·ml-1.本法重现性好,常见共存离子中除Ag(I)严重干扰外,其余离子不影响测定。测定了水样及污泥样品中的Hg含量,结果满意。 |
| 英文摘要 |
| A kinetic method for the determination of mercury based on the catalytic effect of Hg(Ⅱ)upon the redox reaction between oxygen in the air and hexacyanoferrate(Ⅱ)in acidic medium.The conditions for determination is:1.4×10-3mol·L-1 K4[Fe(CN)6],0.14mol·L-1CH3COOH,75℃.The calibration graph is linear for 0.02—0.70 μg·ml-1.The reproducibility of the procedure is fairly good,and most coexist ions do not interefre with the determination of mercury except for silver.Mercury contents in sludge and sewage samples were determined,and the results were satisfactory. |
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