Ngarisan N.I.Ngah C.W.Z.C.W.Ahmad M.Kuswandi B.2024-05-292024-05-292014925400510.1016/j.snb.2014.07.0232-s2.0-84905014021https://www.scopus.com/inward/record.uri?eid=2-s2.0-84905014021&doi=10.1016%2fj.snb.2014.07.023&partnerID=40&md5=7a499c871ea995c7eb24696179a91c94https://oarep.usim.edu.my/handle/123456789/9695Determination of Al(III) from aqueous samples using Chrome Azurol S (CAS) as reagent immobilized in polymer inclusion membranes (PIMs) was discussed. The PIMs was prepared using poly (vinyl chloride) (PVC), 2-nitrophenyl octyl ether (2-NPOE) and Aliquat 336 as polymer matrix, solvent and ion carriers respectively. Experimental designs for four factors (weight of PVC, Aliquat 336, 2-NPOE, and the concentration of CAS) were used for the optimization of the membrane fabrication. For this purpose, a two level half factorial design, which involves eight experiments, was adopted. The combination of 200 mg of PVC, 50 mg of Aliquat 336, 50 mg of 2-NPOE and 1 � 10-3 mol/L CAS was found to be the optimum formulation for the preparation of PIMs. Wide dynamic range of Al(III) determination (0.2-50 ppm), better reproducibility within the same batch, good repeatability and photostability with RSD 1.21% and 0.93%, respectively. The calculated t values indicated that there is no significant difference between the two methods at the 95% confidence level and thus there is no bias in the method. � 2014 Elsevier B.V.en-USAl(III)Chrome Azurol SHalf factorial designOptical sensingOptimizationPolymer inclusion membraneAluminumChlorine compoundsOptimizationPolyvinyl chloridesChrome Azurol SHalf factorial designsMembrane fabricationOptical sensingOptimum formulationPolymer inclusion membranesPolymer inclusion membranes (PIMs)Wide dynamic rangeDesign of experimentsOptimizationArticle465470203SABCE