高等学校化学学报

高等学校化学学报 ›› 1985, Vol. 6 ›› Issue (10): 941.

• 研究论文 • 上一篇    下一篇

维生素B6选择性电极的研究

沈国励, 韩梅, 刘虹, 俞汝勤   

  1. 湖南大学
  • 收稿日期:1984-07-16 出版日期:1985-10-23 发布日期:1985-10-23
  • 基金资助:

    中国科学院科学基金

A Study on Pyridoxinc-Selective Electrode

Shen Guoli, Han Mei, Liu Hong, Yu Ruqin   

  1. Hunan University, Changsha
  • Received:1984-07-16 Online:1985-10-23 Published:1985-10-23

PDF (PC)

摘要： 本文报告以二苦胺·VB6和四苯硼酸·VB6二种离子缔合物为活性材料的PVC·VB6电极,并对影响电极性能的各因素作了详细的讨论,确立以二苦胺,VB6作活性物质,邻苯二中酸二丁酯为介体溶剂,活性物膜含量为0.5％时,电极性能最佳,电极线性区为10-1—1.0×10-5M,斜率,为61mV/decade,较同类活性物的液膜型电极的性能明显有所改善,电极的其它性能也好,实验中选定以Ca(Ac)2-HAc用作VB6电极最佳的离子强度缓冲剂,用Gran法,加入稀释法和电位滴定法进行合成试样的回收时,均获理想的结果。

Abstract: Using pyridoxine-tetraphenylboratc or pyridoxine-dipicrylamine ion-pair cpmplexes as active materials, PVCmembrane pyridoxine ion selective electrodes were prepared. The effects of various factors on the performances of electrodes were studied and the optimum condition of membrane preparation was found. The use of p-yridoine-dipicrylamine as active material and dibutylphthalate as solvent medium gives best electrode characteristics. This electrode shows Nernstian range from 1.0×10-1Mto 1.0×10-5M, with a slope of 61 mV/decade. The stability and reprdducibility ofthe electrode were tested and the pyridoxine samplcs were analyzed by diractpotcntiometry and potentiometric titration procedures. The pKvalue of pyridoxinewas determined potentio-metrically by using the proposed pyridoxine electrode.

TrendMD: