Suah Faiz Bukhari Mohd, Ahmad Musa, Heng Lee Yook
School of Chemical Sciences, Universiti Sains Malaysia (USM), 11800 Minden, Pulau Pinang, Malaysia; School of Chemical Sciences & Food Technology, Faculty of Science & Technology, Universiti Kebangsaan Malaysia (UKM), 43600 Bangi, Selangor, Malaysia.
School of Chemical Sciences & Food Technology, Faculty of Science & Technology, Universiti Kebangsaan Malaysia (UKM), 43600 Bangi, Selangor, Malaysia; Faculty of Science & Technology, Universiti Sains Islam Malaysia (USIM), Bandar Baru Nilai, 71800 Nilai, Negeri Sembilan, Malaysia.
Spectrochim Acta A Mol Biomol Spectrosc. 2015 Jun 5;144:81-7. doi: 10.1016/j.saa.2015.02.068. Epub 2015 Feb 25.
A novel approach for the determination of Al(3+) from aqueous samples was developed using an optode membrane produced by physical inclusion of Al(3+) selective reagent, which is morin into a plasticized poly(vinyl chloride). The inclusion of Triton X-100 was found to be valuable and useful for enhancing the sorption of Al(3+) ions from liquid phase into the membrane phase, thus increasing the intensity of optode's absorption. The optode showed a linear increase in the absorbance at λ(max)=425 nm over the concentration range of 1.85×10(-6)-1.1×10(-4) mol L(-1) (0.05-3 μg mL(-1)) of Al(3+) ions in aqueous solution after 5 min. The limit of detection was determined to be 1.04×10(-6) mol L(-1) (0.028 μg mL(-1)). The optode developed in the present work was easily prepared and found to be stable, has good mechanical strength, sensitive and reusable. In addition, the optode was tested for Al(3+) determination in lake water, river water and pharmaceutical samples, which the result was satisfactory.
通过将铝离子（Al(3+)）选择性试剂桑色素物理包埋于增塑聚氯乙烯中制备光极膜，开发出一种测定水样中Al(3+)的新方法。发现加入吐温X-100对于增强Al(3+)离子从液相到膜相的吸附很有价值且有用，从而提高了光极的吸收强度。在5分钟后，该光极在水溶液中Al(3+)离子浓度范围为1.85×10(-6)-1.1×10(-4) mol L(-1)（0.05-3 μg mL(-1)）时，在λ(max)=425 nm处吸光度呈线性增加。检测限确定为1.04×10(-6) mol L(-1)（0.028 μg mL(-1)）。本工作中开发的光极易于制备，且发现其稳定、具有良好的机械强度、灵敏且可重复使用。此外，该光极用于湖水、河水和药物样品中Al(3+)的测定，结果令人满意。
