Synthesis of 1-(4-antipyrine)-3-(3-nitroaniline)-triazene and its color reaction with gold（Ⅲ）
CHEN Wen-bin*1,2, YIN Lei2, WANG Qiong2, MA Wei-xing2, XU Xing-you2
1. Jiangsu Marine Resources Development Research Institute, Lianyungang 222005，China; 2. Department of Chemical Engineering，Huaihai Institute of Technology，Lianyungang 222005，China
Abstract：In this paper, a kind of triazene reagent of 1-(4-antipyrine)-3-(3-nitroaniline) triazene (ANTA) was synthesized and identified，and its color reaction with gold （Ⅲ） was investigated. Consequently, a new spectrophotometric analysis method of gold （Ⅲ） was established. The results showed that in the presence of Triton X-100, ANTA could react with Au（Ⅲ） sensitively to form an orange red stable complex with complex ratio of 2∶1 in Na2B4O7-NaOH buffer solution. The maximum absorption peak of the complex was located at 515 nm with apparent molar absorptivity of 1.9 ×105 L·mol-1·cm-1. Beer's law was obeyed for gold （Ⅲ） in the range of 0.5-8.0 μg /10 mL, and the detection limit was 0.20 mg/L. The coexisting ions interference test showed that this coloring reaction had strong anti-interference ability. The proposed method has been applied to the determination of gold （Ⅲ） in gold ore samples, and the results were consistent with those obtained by atomic absorption spectrometry with relative standard deviation (RSD, n=6) no more than 0.6 %.
陈文宾*，殷磊，王琼，马卫兴，许兴友. 1-(4-安替比林)-3-(3-硝基苯胺)三氮烯的合成及其与金（Ⅲ）的显色反应[J]. 冶金分析, 2011, 31(9): 50-54.
CHEN Wen-bin*, YIN Lei, WANG Qiong, MA Wei-xing, XU Xing-you. Synthesis of 1-(4-antipyrine)-3-(3-nitroaniline)-triazene and its color reaction with gold（Ⅲ）. , 2011, 31(9): 50-54.
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