Safitri Eka, Humaira Hani, Murniana Murniana, Nazaruddin Nazaruddin, Iqhrammullah Muhammad, Md Sani Nor Diyana, Esmaeili Chakavak, Susilawati Susilawati, Mahathir Muhammad, Latansa Nazaruddin Salsabilla
Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Syiah Kuala, Banda Aceh 23111, Indonesia.
Graduate School of Mathematics and Applied Sciences, Universitas Syiah Kuala, Banda Aceh 23111, Indonesia.
Polymers (Basel). 2021 Apr 14;13(8):1276. doi: 10.3390/polym13081276.
A simple optical pH sensor based on immobilization, L. anthocyanin methanol extract, onto a pectin-chitosan polyelectrolyte complex (pectin-chitosan PEC), has been successfully fabricated. The optical pH sensor was manufactured as a membrane made of pectin-chitosan PEC and the extracted anthocyanin. This sensor has the highest sensitivity of anthocyanin content at 0.025 mg/L in phosphate buffer and 0.0375 mg/L in citrate buffer. It also has good reproducibility with a relative standard deviation (%RSD) of 7.7%, and gives a stable response at time values greater than 5 min from exposure in a buffer solution, and the sensor can be utilized within five days from its synthesis. This optical pH sensor has been employed to determine saliva pH of people of different ages and showed no significant difference when compared to a potentiometric method.
一种基于将黑枸杞花青素甲醇提取物固定在果胶 - 壳聚糖聚电解质复合物（果胶 - 壳聚糖PEC）上的简单光学pH传感器已成功制备。该光学pH传感器制成由果胶 - 壳聚糖PEC和提取出的花青素组成的膜。此传感器在磷酸盐缓冲液中花青素含量为0.025 mg/L、柠檬酸盐缓冲液中为0.0375 mg/L时具有最高灵敏度。它还具有良好的重现性，相对标准偏差（%RSD）为7.7%，并且在缓冲溶液中暴露5分钟以上的时间值时给出稳定响应，并且该传感器在合成后五天内可使用。这种光学pH传感器已用于测定不同年龄人群的唾液pH值，与电位法相比无显著差异。
