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陈文宾, 徐国想, 张娟, 周洪英. 4, 5-二溴苯基荧光酮光度法测定微量钯[J]. 分析测试技术与仪器, 2004, (3): 165-168.
引用本文: 陈文宾, 徐国想, 张娟, 周洪英. 4, 5-二溴苯基荧光酮光度法测定微量钯[J]. 分析测试技术与仪器, 2004, (3): 165-168.
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CHEN Wen-bin, XU Guo-xiang, ZHANG Juan, ZHOU Hong-ying. Determination of Trace Palladium by Spectrophotometric Method with 4, 5-Dibromophenylfluorone[J]. Analysis and Testing Technology and Instruments, 2004, (3): 165-168.
Citation: CHEN Wen-bin, XU Guo-xiang, ZHANG Juan, ZHOU Hong-ying. Determination of Trace Palladium by Spectrophotometric Method with 4, 5-Dibromophenylfluorone[J]. Analysis and Testing Technology and Instruments, 2004, (3): 165-168.
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4, 5-二溴苯基荧光酮光度法测定微量钯

Determination of Trace Palladium by Spectrophotometric Method with 4, 5-Dibromophenylfluorone

    摘要
  • 摘要: 研究了在十二烷基磺酸钠存在下,Pd(Ⅱ)与4,5-二溴苯基荧光酮的显色反应.试验表明,在pH6.3醋酸-醋酸钠缓冲溶液中,Pd(Ⅱ)与试剂形成1:4的暗黄色配合物,配合物的最大吸收峰位于376nm波长处,表观摩尔吸光系数ε为1.06×105L/(mol·cm).Pd(Ⅱ)含量在0～12μg/10mL范围内符合比尔定律.所拟方法用于钯催化剂和钯矿样中微量钯的测定,结果满意.

     

    Abstract: The color reaction of the reagent DBPF with Pd(Ⅱ) in the presence of SLS was studied. Results show that the new color reagent reacts with Pd(Ⅱ) to form a stable yellow complex(1:4)in the presence of SLS at pH 6.3 of HAc-NaAc buffer. The maximum absorption wavelength and apparent molar absorptivity are 376 nm and 1.06×105 L/(mol·cm) respectively. Beer's law is obeyed in the range of 0～12 μg/10 mL Pd(Ⅱ). The method has been applied to the determination of trace palladium (Ⅱ) in palladium catalyst and mineral samples with satisfactory results.

     

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