| 动力学光度法测定水中痕量氟 |
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| 引用本文： | 王建华,何荣桓,韩成利,焦庆祝. 动力学光度法测定水中痕量氟[J]. 高师理科学刊, 1992, 0(1) |
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| 作者姓名： | 王建华 何荣桓 韩成利 焦庆祝 |
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| 作者单位： | 烟台师范学院(王建华，何荣桓)，齐齐哈尔师范学院化学系(韩成利)，齐齐哈尔师范学院化学系(焦庆祝) |
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| 摘 要： | 利用氟离子对H_2O_2—Fe(Ⅲ)—二苯胺磺酸钠催化反应体系的抑制作用,提出了一种测定痕量氟的动力学方法.在F~-含量为0～0.95μg·mL~(-1)范围内,1g(Am/Ai)(Am,Ai分别为非抑制反应和抑制反应体系的吸光度)与F~-离子浓度呈线性变化关系;表观摩尔吸光系数ε_(390)=4.25×10~5,方法灵敏度为0.019μg·mL~(-1).用本法测定了废水和自来水中的氟含量,结果良好.
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| 关 键 词： | 氟 痕量分析 动力学光度法 |
A Kinetic-spectrophotometric Method for the Determination of Trace Fluorine in Water |
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| Wang Jianhua He Ronghuan Han Chengli Jiao Qingzhu. A Kinetic-spectrophotometric Method for the Determination of Trace Fluorine in Water[J]. Journal of Science of Teachers＇College and University, 1992, 0(1) |
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| Authors: | Wang Jianhua He Ronghuan Han Chengli Jiao Qingzhu |
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| Affiliation: | Wang Jianhua He Ronghuan Han Chengli Jiao Qingzhu(Yantai Normal College) (Department of Chemistry) |
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| Abstract: | A method for the determination of trace fluorine has been proposed based on the inhibitory effect of F- upon the catalytic redox reaction of Fe(Ⅲ) -H2O2-sodium diphenylamine sulfonate systems. Linear relationship between lg(Am/Ai) and F- concentration within the range of 0～0. 95μg· mL-1 was obtained. The apparent molar absorptivity is 4. 25×10 5 at λ= 390nm and the sensitivity of the method is 0.019μg · mL-1 . The method has been used for the determination of trace fluorine in water , and the results are satisfactory. |
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| Keywords: | Fluorine Trace analysis Kinetic-spectrophotometry |
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