Malaysian
Journal of Analytical Sciences Vol 22 No 1 (2018): 45
- 53
DOI:
10.17576/mjas-2018-2201-06
ASSESSING STIR BAR SORPTIVE EXTRACTION FOR TRIAZINE HERBICIDES
EXTRACTION BY USING A CENTRAL COMPOSITE DESIGN APPROACH
(Penilaian
Pengekstrakan Erapan Bar untuk Pengekstrakan Herbisid Triazin Menggunakan
Pendekatan Reka Bentuk Komposit Berpusat)
Nurul Auni Zainal
Abidin1,2*, Md Pauzi Abdullah1,3,
Fouad Fadhil Al-Qaim1,
4, 5, Wan Mohd Afiq Wan Mohd Khalik3,6, Mohamed Rozali Othman1,3
1School of Chemical Sciences and Food Technology, Faculty of Science and Technology,
Universiti Kebangsaan Malaysia, 43600 UKM Bangi,
Selangor, Malaysia
2Faculty of Applied
Sciences,
Universiti Teknologi MARA Negeri Sembilan, Kuala Pilah Campus, 72000 Kuala Pilah, Negeri Sembilan, Malaysia
3Centre for Water Research and Analysis (ALIR), Faculty of Science and Technology,
Universiti Kebangsaan Malaysia, 43600 UKM Bangi, Selangor, Malaysia
4Department of Chemistry, Faculty of Science for Women,
University of Babylon, PO Box 4, Hilla, Iraq
5Department of Environmental Engineering and Green Technology, Malaysia–Japan International Institute of Technology,
Universiti Teknologi Malaysia, 54100 Kuala Lumpur, Malaysia.
6School of Marine and Environmental Sciences,
Universiti Malaysia Terengganu, 21030 Kuala Nerus, Terengganu, Malaysia
*Corresponding author: nurulauni@ns.uitm.edu.my
Received:
24 October 2017; Accepted: 4 January 2018
Abstract
A
(PDMS)-coated stir bar was prepared for a glass jacket-free stir bar sorptive extraction (SBSE) configuration by adhesion
technique for the extraction of triazine herbicides
prior to quantification using a gas chromatography-flame ionization detector
(GC-FID). A central composite design (CCD) was used in the optimization of
extraction and desorption conditions. At optimum conditions, values of factors
were set as pH 8.5, with no addition of NaCl, for 25
minutes of extraction time, and 24 minutes of desorption time. Under optimal
experimental conditions, the proposed method has linear ranges at 0.1 – 100 µgL-1
with correlation of determination (R2), ranging from 0.9991 –
0.9995, respectively. The limit of detection (LODs) and limit of quantification
(LOQs) of three triazines were found to be ranging
from 0.015 – 0.023 µgL-1 and 0.047 – 0.060 µgL-1,
respectively.
Bar berputar yang disalut
dengan polidimetilsiloksana (PDMS) telah disediakan untuk pengekstrakan erapan
bar berputar (SBSE) tanpa jaket kaca melalui teknik lekatan untuk dianalisa
sebelum kuantifikasi racun herbisid triazin dengan menggunakan kromatografi
gas-pengesan ionisasi nyala (GC-FID). Reka bentuk komposit berpusat (CCD) telah
digunakan untuk proses pengoptimuman keadaan pengekstrakan dan nyahjerapan.
Pada keadaan optimum, nilai faktor adalah pH 8.5, tanpa penambahan NaCl, 25
minit masa pengekstrakan, dan masa nyahjerapan 24 minit. Kajian berdasarkan
julat kelinearan antara 0.1 – 100 µgL-1 telah mencapai kelinearan
yang baik dengan pekali R2 di rekod antara 0.9991 – 0.9995. Had
pengesanan (LODs) dan kuantifikasi (LOQs) bagi tiga jenis triazin tersebut
masing- masing dihitung antara 0.015 – 0.023 µgL-1 dan 0.047 – 0.060
µgL-1.
Kata
kunci: pengekstrakan erapan bar berputar, herbisid
triazin, reka bentuk komposit berpusat, pemalar pemisahan
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