(1.湖南大學(xué)化學(xué)化工系，長(zhǎng)沙 410082;
2.湖南師范大學(xué)分析測(cè)試中心，長(zhǎng)沙 410081)
摘 要: 報(bào)道了一種新的高靈敏度非水溶性卟啉顯色劑meso-四(5-溴-2-羥基苯基)卟啉的合成方法，并研究了該試劑與銅反應(yīng)的條件。研究結(jié)果表 明，在pH3.0的HCl-NaAc緩沖介質(zhì)中和SDS-吡啶-鎘存在下，沸水浴加熱12min反應(yīng)進(jìn)行完全。在最大吸收波長(zhǎng)417nm處，配合物的表觀摩爾吸光系數(shù)ε值是4.01×105L·mol-1·cm-1，銅量在0～160μg/L范圍內(nèi)符合比爾定律。方法應(yīng)用于廢水、人發(fā)和鋁合金中微量銅的直接測(cè)定，結(jié)果滿意。
關(guān)鍵字: 銅 分光光度法 meso-四(5-溴-2-羥基苯基)卟啉
（1.Department of Chemistry and Chemical Engineering, Hunan Unive rsity, Changsha 410082
2.Analysis Test Centre, Hunan Normal University, Changsha 410081）
Abstract:The synthesis of a new highly sensitive water-inso luble colour reagentmeso-tetra-(5-bromo-2-
hydroxyphenyl) porphyrin has been reported and reaction conditions of the reagent with copper(Ⅱ) have been investigated. In medium of pH 3.0 HCl-NaAc buffer and in the presence of SDS-pyridin-cadmium, the reaction was completd by heating on boiling water bath for 12 min. The apparent molar absorptivity of the complex is 4.01×105L·mol-1·cm-1 at 417nm, the Beer's law is obeyed for copper(Ⅱ) in the range of 0～160μg/L. The method has been applied to the direct determination of trace copper(Ⅱ) in waste water, human hair and Al alloys with satisfactory results.
Keywords copper spectrophotometry meso-tetra-(5-bromo-2-hydroxyphenyl) porphyrin
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