节点文献

1-(4-安替比林)-3-(4-硝苯基)-三氮烯与镉(Ⅱ)的显色反应研究及其应用

A Study on the Colour Reaction of Cadmium(Ⅱ) With 1-(4-Antipyrinyl)-3-(4-nitrobenzene)-triazene and Its Application

  • 推荐 CAJ下载
  • PDF下载
  • 不支持迅雷等下载工具,请取消加速工具后下载。

【作者】 徐斌龚楚儒徐一鸣张海丽

【Author】 Xu Bin~*, Gong Churu, Xu Yiming, Zheng Haili(Department of Chemistry, Hubei Normal University, Huangshi 435002)

【机构】 湖北师范学院化学系湖北师范学院化学系 黄石 435002黄石 435002黄石 435002

【摘要】 本文研究了题示试剂的一些性质及其与镉的显色反应。在TritonX-100存在下,pH为11.8~12.8时,镉(Ⅱ)与试剂生成黄色的1∶2型络合物,最大吸收位于454nm,而在536nm处,试剂与络合物吸收的差值最大。以454nm为参比波长,536nm为测量波长时,ε=2.32×105L·mol-1·cm-1,线性范围。0~10μg/25ml。以双波长法成功地测定了人发中的镉含量,加入回收率为99%~102%,方法的相对标准偏差为0.87%。

【Abstract】 The dissociation constant of 1-(4-antipyrinyl)-3-(4-nitrobenzene)-triazene(APNBT) is determined by speetrophotometry in the presence of Triton X-100. At pH 11.8 to 12.8, Cd(Ⅱ) reacts with APNBT to from a yellow complex with a ratio 1:2, which has an absorption maximum at 454 nm and has a maximum difference of absorbanee between reagent and complex at 536 nm, At 454 and 536 nm, the apparent molar absorptivities and the range of obeyed Beer’s law are ε=9.5 6×104 L·mol-1·cm-1, 0~10μg Cd/25m1 and ε=1.37×10s L·mol-1·cm-1, O~171μgCd/25ml, respectively. For dual-wavelength speetrophotometry with reference wavelength of 454nm and determination wavelength of 536nm, the molar absorptivity is 2.32×105 L·mol-1·cm-1, Beer’s law is obeyed in the range of 0~10μg Cd/25ml.The trace cadmium in human hair has been determined by the method. The relative standard deviation (δ=5) is less than 0.87% and the recovery for the added standard cadmium reaches 99%~102%

【关键词】 人发三氮烯
【Key words】 CadmiumTriazeneHuman hair
  • 【文献出处】 分析化学 ,Chinese Journal of Analytical Chemistry , 编辑部邮箱 ,1992年12期
  • 【被引频次】26
  • 【下载频次】37
节点文献中: 

本文链接的文献网络图示:

本文的引文网络