摘要
合成了新试剂1-(2-噻唑)-3-(8-(5-对磺酸基苯基偶氮)喹啉-三氮烯(TCPQT),并研究了其与Cu2+的显色反应。结果表明:在pH 7.5的磷酸盐缓冲溶液中,TCPQT与Cu2+形成摩尔比为1:1的紫红色络合物,该络合物在606.5nm处有一最大吸收峰,其表观摩尔吸光系数为3.36×105L.mol-1.cm-1,Cu2+的质量浓度在0～0.4μg/mL范围内符合比尔定律,相关系数r=0.9993。方法已用于测定食品中的微量铜。
A new reagent 1-（2-thiazole）-3-（8-（5-p-sulfophenylazo）quinoline-triazene（TCPQT） was synthesized.And the color reaction of this reagent with Cu2＋ was studied.The results showed that TCPQT could react with Cu2＋ to form a stable complex with a molar ratio of 1：1 and the maximum absorption wavelength of 606.5nm in phosphate buffer solution（pH 7.5）.The Beer＇s law was obeyed in the concentration range of 0～0.4 μg/mL for Cu2＋ with the correlation coefficient of 0.9993 and the apparent molar absorptivity of 3.36×105 L·mol-1·cm-1.The proposed method was satisfactorily applied to the determination of trace copper in the food samples.
出处
《分析试验室》
CAS
CSCD
北大核心
2012年第1期95-97,共3页
Chinese Journal of Analysis Laboratory
基金
云南省自然科学基金(2008CD066)资助
