双席夫碱敏感膜碳糊铬(Ⅲ)离子选择性电极  

Chromium(Ⅲ)ion selective electrode based on schiff base

作　　者：陈进 Chen Jin(Shenhua yulin energy chemical company limited,Yulin 719309,China)

机构地区：[1]神华榆林能源化工有限公司,陕西榆林719309

出　　处：《化学传感器》2019年第3期63-65,共3页Chemical Sensors

摘　　要：以邻香草醛和1,3-二氨基硫脲合成的双席夫碱邻香草醛缩-1,3-二氨基硫脲为中性载体,制备了新型的铬(Ⅲ)离子选择性电极。室温下,电极对Cr3+的能斯特响应范围为4.00×10^(-7)~1.00×10^(-2) mol/L,斜率为20.19 mV/dec,检出限为1.53×10^(-7) mol/L。电极pH使用范围广(3.20~5.20),稳定性好,使用寿命长。在选定的条件下,考察了10余种离子的干扰情况,并利用该离子选择性电极对对工业废水中Cr3+进行了测定,取得了较好结果。A carbon film based on o-vanillin-1,3-diethyl-2-thiouree synthesized using the rection of o-vanillin with 1,3-diethyl-2-thiouree as a film carrier,was prepared and investigated as a Cr(Ⅲ)-selective electrode.The electrode has a linear dynamic range of 4.00×10^(-7)~1.00×10^(-2) mol/L,with a near Nerstian slope of 20.19 mV per decade and a detection limit of 1.53×10^(-7) mol/L.It has could be used for long time successfully.The potential of this electrode is independent of pH in the range of 3.20-5.20,and it also exhibits a very good selectivities for Cr(Ⅲ)over a wide variety of metal ions.The electrode has been used to determine the chromium contents industrial waste water,and the result is excellent.

关 键 词：铬(Ⅲ) 离子选择性电极 邻香草醛缩-1 3-二氨基硫脲 

分 类 号：O657.1[理学—分析化学] X832[理学—化学]