摘要
用水杨醛和邻苯二胺合成了水杨醛缩邻苯二胺双席夫碱(SPS),将其作为中性载体与碳粉混合,以液体石蜡为粘合剂,制备出能斯特响应铜(Ⅱ)离子选择性电极,应用于SCN-的测定。SCN-浓度在1.0×10-6～1.0×10-2mol/L之间时该电极对其具有能斯特响应,检测下限为4.0×10-7mol/L。在pH值为3.5～4.6的SCN-溶液中,电极的响应时间均小于30s。电极的稳定性好,灵敏度高,使用寿命长,已用于废水中SCN-的分析。
Salicylaldehyde-1,2-phenylenediamine（ SPS） was synthesized by the reaction of salicylaldehyde with phenylenediamine. A copper（Ⅱ） ionic selective electrode with a sensitive membrane consisted of carbon paste and neutral SPS carrier was fabricated with liquid paraffin as the binder. The Cu（Ⅱ）-selective electrode was deployed to determine the concentration of SCN ^- anion and exhibited a Nernstian response to SCN^ - ions over a range of 1. 0 × 10 ^-6 ～ 1. 0 × 10 ^-2 mol /L,with a regression equation of E（ mV） = - 51. 19 lg cSCN - - 853. 75（r = 0. 9997） and a detection limit of 4. 0 × 10^ -7 mol /L. The response time of the electrode is less than 30 s. The electrode also shows a high selectivity,good stability and durability. The electrode has been successfully applied in determing the concentrations of SCN^ - in waste water samples.
出处
《应用化学》
CAS
CSCD
北大核心
2010年第8期950-954,共5页
Chinese Journal of Applied Chemistry
基金
广西教育厅科研基金(桂教科200508135)
广西研究生教育创新人才联合培养基地资助项目
