巢湖学院学报 ›› 2021, Vol. 23 ›› Issue (3): 78-85.doi: 10.12152/j.issn.1672-2868.2021.03.011

• 化学与材料科学 • 上一篇    下一篇

5'-硝基水杨基荧光酮分光光度法测定维生素 B12 中钴的含量

汤家华, 程乐华:巢湖学院化学与材料工程学院,巢湖学院配位化学研究所   

  1. 巢湖学院化学与材料工程学院,巢湖学院配位化学研究所
  • 收稿日期:2021-02-20 出版日期:2021-05-25 发布日期:2021-05-25
  • 通讯作者: 汤家华(1963—),女,安徽巢湖人,巢湖学院化学与材料工程学院高级实验师,主要从事分析测试研究。
  • 作者简介:汤家华(1963—),女,安徽巢湖人,巢湖学院化学与材料工程学院高级实验师,主要从事分析测试研究。

Spectrophotometric Determination of Cobalt in Vitamin B12 with 5’-Nitro-Salicylfluorone

TANG Jia-hua,CHENG Le-hua:1.School of Chemistry and Material Engineering, Chaohu University;2.Institute of Coordination Chemistry, Chaohu University   

  1. 1.School of Chemistry and Material Engineering, Chaohu University;2.Institute of Coordination Chemistry, Chaohu University
  • Received:2021-02-20 Online:2021-05-25 Published:2021-05-25
  • Contact: TANG Jia-hua1:School of Chemistry and Material Engineering, Chaohu University, Chaohu Anhui 238024
  • About author:TANG Jia-hua1:School of Chemistry and Material Engineering, Chaohu University, Chaohu Anhui 238024

摘要: 以5’-硝基水杨基荧光酮(5’-NSAF)为显色剂,建立了分光光度法测定钴的新方法。研究表明:在pH为9.2 的NH3.H2O-NH4Cl 缓冲介质中,在表面活性剂TritonX-100 作用下,钴(Ⅱ)与5’-硝基水杨基荧光酮能生成一种红色配合物,配合物在546 nm处有最大吸收,表观摩尔吸光系数为3.7*104 L.mol-1.cm-1,检出限(3s/k)为5.64*10-3 mg/L,钴(Ⅱ)的质量浓度在0~0.5 μg/mL范围内与吸光度A有良好的线性关系。方法应用于维生素B12注射液中钴含量的测定,结果满意。

关键词:

Abstract: A new method for the determination of cobalt was established by spectrophotometry with 5’-nitro-salicylfluorone(5’-N-SAF)as coloring agent. In the buffer solution of NH3.H2O-NH4Cl at pH 9.2, cobalt(Ⅱ) reacted with 5’-N-SAF and formed a red complex in the presence of TritonX-100. The apparent molar absorptivity was 3.7 *104 L.mol-1.cm-1 at 546 nm; the detection limit(3s/k)was 5.64 *10-3 mg/L; Beer's law was obeyed for the mass concentration of cobalt(Ⅱ)in range of 0~0.5 μg/mL. The method was applied to the determination of cobalt content in Vitamin B12 injections, and the results were satisfactory.

Key words: 5’-nitro-salicylfluorone, spectrophotometry, Vitamin B12, cobalt

中图分类号: 

  • O657.3