2-乙酰吡啶缩(2 -吡啶亚胺基)肼的合成及其与铜显色反应

Synthesis of 2-aceto-pyridine Condensation(2 -pyridine imido-group) Hydrazine and its Color Reaction

摘要: 报道了新试剂2-乙酰吡啶缩(2’-吡啶亚胺基)肼的合成与鉴定,系统研究了该试剂与铜的显色反应条件及应用,建立了2-乙酰吡啶缩(2’-吡啶亚胺基)肼光度法测定微量铜的新方法.在pH8.00左右的弱碱性介质中,Cu2+与2-乙酰吡啶缩(2’-吡啶亚胺基)肼反应生成摩尔比为1∶1的黄绿色络合物,最大吸收波长为430 nm,其表观摩尔吸光系数ε430=1.12×104L.mol-1.cm-1,铜含量在0.200~5.00 g.L-1范围内符合比尔定律,该方法可用于环境水样中微量铜的测定,加标回收率在96.9%~99.4%之间.

Abstract: A new reagent,2-aceto-pyridine condensation(2 -pyridine imido-group) hydrazine(2-AP-(2 -PI) H) was synthesized,and a new spectroscopic method for determination of Cu(Ⅱ) was developed based on the color reaction between(2-AP-(2 -PI) H) and Cu(Ⅱ).In a medium of pH 8.0,copper reacts with(2-AP-(2 -PI) H) to form a yellow-green complex with a molar ratio of 1∶1.This complex has bigger absorbance in the range of 380~450 nm wave length,and the apparent molar absorption coefficient is 1.12×104 L·mol-1·cm-1 at 430 n...