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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 Received: 1 February
2014/Accepted: 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;
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