摘要
介绍了新试剂N—对甲苯基—N′—(氮基对苯磺酸钠)硫脲(PMPT)和N·辛基—N′—(氨基对苯磺酸钠)硫脲(OPT)的合成。经过红外、紫外、核磁和元素分析等方法测试,确定了其组成和结构。并分别研究了新试剂与Cu(Ⅱ)的显色反应,建立了测定微量铜的新方法。方法具有灵敏度高,操作简便,显色速度快等特点。试验了四十余种常见离子对显色反应的干扰情况,表明方法具有较好的选择性。并将方法不经分离直接用于合金标样及动物肝脏中铜的测定,结果满意。
The synthesis of two new reagents N-(p-methylphenyl)-N'-(sodium p-aminobenzenesulfonate) thiourea (PMPT) and N-octyl-N'-(sodium p-aminobenzenesulfonate) thiourea (OPT) and their characterization by elemental analysis. HNMR. IR and UV spectrometry are reported in this paper. It is found that in HOAc-NaOAc buffer solutions of pH 3. 0~5.5, Cu^(2+) reacts with PMPT and OPT to form 1 : 3 stable water soluble complexes with apparent molar absorptivities of 1.14×10~5L ·mol^(-1) ·cm'1 and 1. 28× 10~5L ·mol^(-1) ·cm^(-1) respectively. Beer's law is obeyed in the range of 2~40 and 0~10μg Cu( Ⅱ ) per 25ml respectively. The methods have been applied satisfactorily to the determination of copper ( Ⅱ ) in chicken livers and alloy samples respectively.
出处
《理化检验（化学分册）》
CAS
CSCD
北大核心
1999年第2期51-54,共4页
Physical Testing and Chemical Analysis(Part B:Chemical Analysis)
基金
河南省自然科学基金资助项目
关键词
显色反应
硫脲
光度法
铜
测定
PMPT
OPT
N-(p-methylphenyl)-N'-(sodium p-aminobenzenesulfonate ) thiourea, N-octyl-N'-(sodium paminobenzenesulfonate) thiourea, Copper ( I ), Synthesis, Color reaction
