| 催化光度法测定痕量8—羟基喹啉 |
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| 引用本文： | 杨景芝,孙衍华.催化光度法测定痕量8—羟基喹啉[J].山东农业大学学报(自然科学版),1999,30(2):167-170. |
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| 作者姓名： | 杨景芝 孙衍华 |
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| 作者单位： | 山东农业大学动物科技学院，山东农业大学基础部，泰安市化工技校 |
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| 摘 要： | 研究了在硫酸环境中８－羟基喹啉对碘催化亚砷酸与硫酸铈氧化还原反应的抑制作用及其动力学条件。据此建立了动力学的直接光度法测定痕量８－羟基喹啉的新方法。结果表明，在０２２５ｍｏｌ／ＬＨ２ＳＯ４，０００１２５ｍｏｌ／ＬＡｓ２Ｏ３，０００１ｍｏｌ／ＬＣｅ（ＳＯ４）２，００１ｍｇ／ＬＩ，０５ｇ／ＬＮａＣｌ环境中测定８－羟基喹啉，其线性范围为００２０～０２７ｍｇ／Ｌ，表观摩尔吸光系数为２７×１０５Ｌ·ｍｏｌ１·ｃｍ１，Ｓａｎｄｅｌ灵敏度为０５３８μｇ／ｃｍ２。用本法对药物硫酸羟基喹啉钾中的８－羟基喹啉含量的测定，结果满意。
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| 关 键 词： | 催化光度法 8-羟基喹啉 碘离子 |
DETERMINATION OF TRACE 8-HYDROXYQUINOLINE BY CATALYTIC PHOTOMETRY |
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| Yang Jingzhi.DETERMINATION OF TRACE 8-HYDROXYQUINOLINE BY CATALYTIC PHOTOMETRY[J].Journal of Shandong Agricultural University,1999,30(2):167-170. |
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| Authors: | Yang Jingzhi |
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| Abstract: | In this paper we studied the inhibition effect of 8-hydroxyquinoline on the catalytic oxidation of arsenous acid with cerium()sulfate in the presence of iodide anion in the sulfuric acid and the kinetic conditions.Based on this,a new catalytic kinetic photometric method for the direct determination of trace 8-hydroxyquinoline was established.It is shown that the apparent linear range and molar absorptivity and Sandell are 0.0200.27mg/L and 2.7105Lmol1cm1 and 0.538g/cm2,respectively for the determination of 8-hydroxyquinoline in 0.225mol/L H2SO4, 0.00125mol/L As2O3,0.001mol/L Ce(SO4)2,0.01mg/L I- and 0.5g/L NaCl solution,This method has been used to determine 8-hydroxyquinoline in potassium hydroxyquinoline sulphate with satisfactory results. |
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| Keywords: | catalytic photometry 8-hydroxyquinoline iodide anion |
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