分析测试学报2013，Vol.32Issue(6)：759-763,5.DOI:10.3969/j.issn.1004-4957.2013.06.019
新试剂1-(2-苯并噻唑)-3-(8-(5-对磺酸基苯基偶氮))喹啉三氮烯(BTSPQT)的合成及其测定铜(Ⅱ)的研究
Synthesis of 1-(2-Benzothiazole)-3-(8-(5-p-sulfophenylazo))quinolinetriazene (BTSPQT) and Its Application in Determination of Copper(Ⅱ)
摘要
Abstract
A new triazene reagent,1-(2-benzothiazole)-3-(8-(5-p-sulfophenylazo)) quinolinetriazene(BTSPQT),was synthesized using 2-aminobenzothiazole and 5-p-sulfophenylazo-8-aminoquinoline as raw material,and the chromogenic reaction of this reagent with Cu2+ was investigated.The resuits showed that BTSPQT could reacì with Cu2+ at room temperature in Na2B4O7-HC1 buffer(pH 8.0) containing 0.3％ Triton X-100 to form a purple complex with a molar ratio of BTSPQT to Cu2+ by 2 ∶ 1 and the stability constant of (2.59 ± 0.40) × 109.The maximum absorption wavelength of this complex was located at 610 nm.Based on this reaction,a new spectrophotometric method for the determination of Cu2+ was developed.Beer's law was obeyed in this method in the concentration range of 0.025-0.40 mg/L for Cu2+ with the apparent molar absorptivity of 3.61 × 105 L · mo1-1 · cm-1 Some common metals at the concentration below 2.5 mg/L did not interfer the determination of 0.40mg/L Cu2+.The proposed method was applied in the determination of trace copper in flour and tea samples with recoveries of 96％-103％ and relative standard deviations (RSDs) less than 4.0％.关键词
1-(2-苯并噻唑)-3-(8-(5-对磺酸基苯基偶氮))喹啉三氮烯/铜(Ⅱ)/分光光度法Key words
1-(2-benzothiazole)-3-(8-(5-p-sulfophenylazo)) quinolinetriazene / copper(Ⅱ) / spectrophotometry分类
化学化工引用本文复制引用
龙巍然,李映晖,岑怡红,洪涛,曹秋娥..新试剂1-(2-苯并噻唑)-3-(8-(5-对磺酸基苯基偶氮))喹啉三氮烯(BTSPQT)的合成及其测定铜(Ⅱ)的研究[J].分析测试学报,2013,32(6):759-763,5.基金项目
国家自然科学基金资助项目(20965009) （20965009）
