Sains Malaysiana 45(12)(2016): 1795–1805

http://dx.doi.org/10.17576/jsm-2016-4512-03

 

Peningkatan Kesensitifan Sensor Al(III) Optik dengan Menggunakan Manik Terkandung Polimer

(Enhancing the Sensitivity of Al(III) Optical Sensor by Utilizing Polymer Inclusion Beads)

 

 

FAIZ BUKHARI MOHD SUAH1,2*, MUSA AHMAD2,3 & LEE YOKE HENG2

 

1Pusat Pengajian Sains Kimia, Universiti Sains Malaysia, 11800 Minden, Pulau Pinang, Malaysia

 

2Pusat Pengajian Sains Kimia dan Teknologi Makanan, Fakulti Sains dan Teknologi, Universiti Kebangsaan Malaysia, 43600 Bangi, Selangor Darul Ehsan, Malaysia

 

3Fakulti Sains dan Teknologi, Universiti Sains Islam Malaysia, Bandar Baru Nilai, 71800 Nilai, Negeri Sembilan Darul Khusus, Malaysia

 

Diserahkan: 1 Februari 2014/Diterima: 5 April 2016

 

ABSTRAK

Sensor Al(III) optik berasaskan prinsip pengukuran pantulan dengan menggunakan manik polimer terkandung polimer (PIMs) terpegun telah dibangunkan. Manik PIMs terpegun yang disediakan dalam kajian ini mengandungi manik poli(vinil klorida) (PVC), Aliquat 336, diositil pthalat (DOP) dan reagen eriokrom sianin R (ESR). Sensor yang menggunakan manik PIMs terpegun ini menunjukkan rangsangan yang lebih tinggi berbanding dengan sensor yang tidak menggunakan manik PIMs. Masa rangsangan sensor pula ditetapkan selepas 3 min dengan nilai pH optimum 6.0. Sensor Al(III) optik ini memberikan rangsangan linear pada julat 5.56×10-5 - 3.52×10-4 molL-1, dengan nilai had pengesanan terendah (LOD) yang dikira ialah 3.41×10-5 molL-1. Kajian validasi nilai ion Al(III) bagi beberapa sampel air semula jadi yang ditambah dengan ion Al(III) menggunakan sensor Al(III) optik yang dibangunkan dalam kajian ini, menunjukkan tiada perbezaan secara signifikan pada nilai ion Al(III) yang diperoleh apabila dibandingkan dengan keputusan yang diperoleh menggunakan spektrofotometer serapan atom konvensional.

 

Kata kunci: Aliquat 336; eriokrom sianin R; manik terkandung polimer; penentuan Al(III); sensor Al(III) optik

 

ABSTRACT

An optical Al(III) sensor base on reflectance principle has been developed using polymer inclusion membranes (PIMs) beads. The immobilized PIMs beads are consists of poly(vinyl chloride) (PVC), Aliquat 336, dioctyl phthalate (DOP) and eriochrome cyanine R (ECR) reagent. The sensor which was based on immobilized PIMs beads produced higher response compared to sensor based on non-immobilized PIMs beads. The response time of the sensor was 3 min with an optimum pH value of 6.0. This optical Al(III) sensor gave a linear response at the range of 5.56×10-5 - 3.52×10-4 molL-1, with the limit of detection value 3.41×10-5 molL-1. Validation of Al(III) value in spiked natural water samples by using Al(III) sensor developed in this study showed no significance differences compared with results obtained by using conventional atomic absorption spectrophotometer.

 

Keywords: Aliquat 336; Al(III) determination; eriochome cyanine R; optical Al(III) sensor; polymer inclusion beads

 

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*Pengarang untuk surat-menyurat; email: fsuah@usm.my

 

 

 

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