第 32 卷第 1 期 | | Vol. 32 No. 1 | 2002 年 2 月 | Feb 2002 |
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所属栏目:其它
1,2,3-三羧甲氧基苯的催化合成及其与钍的显色反应 |
张剑峰; 刘佳佳; 李晓如; 江文辉(中南大学化学化工学院; 湖南长沙; 410083) |
摘 要:以三丁基乙基硫酸乙酯铵为相转移催化剂 ,用焦性没食子酸、一氯乙酸和氢氧化钠为原料 ,合成了一种新的钍分析试剂——— 1,2 ,3-三羧甲氧基苯 (TCMOB)。显色试验表明 ,TCMOB是一种性能优良的钍显色剂 ,在 2 5ml 4mol/L的HClO4 介质中形成 1∶1的配合物 ,其最大吸收峰位于 32 5nm ,吸光系数为ε4 2 5nm =8.86× 10 4 L·mol- 1·cm- 1,钍的含量在 0~30 μg/ 2 5ml范围内符合比尔定律 |
关键词:1; 2; 3三羧甲氧基苯; 合成; 钍 |
中图分类号:TQ241.1+5 文献标识码:A 文章编号:1009-9212(2002)01-0012-02 |
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The Catalytic Synthesis and Colour Reaction with Thorium of 1,2,3-tri(carboxylmethoxyl)benzene. |
ZHANG Jian feng; et al.(Academy of Chemistry and Chemical Engineering; Central South University; Changsha; 410083) |
Abstract:A new reagent, 1,2,3 tri(carboxylmethoxyl) benzene(TCMOB), which is highly sensitive and selective chromogenic to the determination of thorium, was catalytically synthesized from pyrogallol, chloroacetic acid and sodium hydroxide in a chloroform solvent. In a 2.5ml 4mol/L perchloric acid medium, thorium reacts with TCMOB to form a stable 1∶1 chelate, which has a maximum absorption at 325nm. Beer's law is obeyed over the range of 0~30μg/25ml, whereas the apparent molar absorptivity is 8.86×10 4L·mol -1 ... |
Key words:tri(carboxylmethoxyl) benzene; synthesis; thorium |
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基金项目:湖南省科委科研基金资助项目(01-962-50-2)
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收稿日期:2001-07-03
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