摘要
采用丙烯酰胺为偶合剂,以Fe2+/H2O2为引发剂,将邻甲酚红通过表面接枝聚合固定于交联聚乙烯醇膜表面,制备了一种可用于光化学pH传感器的pH敏感膜。性能测试表明,此膜具有pH响应范围宽(pH7.97～12.26)、响应时间快(<25s)、耐盐性好、可逆重复性及光和贮存稳定性良好,制备方法简单的优点。实验表明,此膜可用于光化学pH传感器。
An optical chemical pH sensitive membrane for optical chemical pH sensors has been developed by covalently immobilizing cresol red on optical transparent cross-linked polyvinyl alcohol （ PVA） membrane surfaces by using acrylamide as couple agent and Fe2 ＋ /H2O2 as initiator. The performance of the pH sensitive membrane was investigated. The results showed that the pH sensitive membrane had some excellent features. Firstly,the sensitive membrane still held two pH response intervals and the two response intervals were expanded from pH 0. 15 1. 18 and pH 7. 33 8. 94 of cresol red solution to 0. 1 5 mol/L [H ＋]and pH = 7. 97 12. 26. Secondly,the optical chemical pH sensitive membrane had rapid response time （ 25 s） , good reproducibility,reversibility,excellent optical and storage stability. Lastly,the typical feature of the optical chemical pH sensitive membrane was easiness of fabrication. All of these show that the pH sensitive membrane is suitable to be used as a sensitive layer for optical pH sensor.
出处
《分析化学》
SCIE
EI
CAS
CSCD
北大核心
2010年第11期1609-1614,共6页
Chinese Journal of Analytical Chemistry
基金
国家自然科学基金(No.50273037)资助项目
