Hasheminejad Mahdieh, Nezamzadeh-Ejhieh Alireza
Department of Chemistry, Shahreza Branch, Islamic Azad University, P.O. Box 311-86145, Shahreza, Isfahan, Iran.
Department of Chemistry, Shahreza Branch, Islamic Azad University, P.O. Box 311-86145, Shahreza, Isfahan, Iran; Razi Chemistry Research Center (RCRC), Shahreza Branch, Islamic Azad University, Isfahan, Iran.
Food Chem. 2015 Apr 1;172:794-801. doi: 10.1016/j.foodchem.2014.09.057. Epub 2014 Sep 17.
A citrate-selective sensor was prepared by modification of a PVC membrane with modified nano-clinoptilolite particles by hexadecyltrimethyl ammonium surfactant (SMZ). A Nernstian slope of 29.9 ± 0.2 mV per decade of citrate concentration was obtained over the concentration range of 5.0 × 10(-5)-5.0 × 10(-2) mol L(-1) of citrate. The electrode showed a fast response time (⩽ 10 s) and a detection limit of 1.3 × 10(-5) mol L(-1) of citrate. The linear range and detection limit were respectively changed to 1.0 × 10(-4)-5.0 × 10(-2) mol L(-1) and 1.0 × 10(-4) mol L(-1) of citrate when the micronized clinoptilolite particles were used.
通过用十六烷基三甲基铵表面活性剂（SMZ）修饰的纳米斜发沸石颗粒对PVC膜进行改性，制备了一种柠檬酸盐选择性传感器。在柠檬酸盐浓度为5.0×10⁻⁵ - 5.0×10⁻² mol L⁻¹的范围内，获得了每十倍柠檬酸盐浓度变化29.9±0.2 mV的能斯特斜率。该电极显示出快速响应时间（⩽10 s），柠檬酸盐的检测限为1.3×10⁻⁵ mol L⁻¹。当使用微粉化斜发沸石颗粒时，线性范围和检测限分别变为1.0×10⁻⁴ - 5.0×10⁻² mol L⁻¹和1.0×10⁻⁴ mol L⁻¹的柠檬酸盐。
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