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Alam, Seikh Mafiz,Karim, Mohammad Mainul,Lee, Sang Hak,Wabaidur, Saikh Mohammad,Chung, Hye Young,Choi, Jong Ha,Kang, Meea John Wiley Sons, Ltd. 2008 Luminescence Vol.23 No.5
<P>A simple chemiluminometric method using flow injection has been developed for the determination of laevodopa, based on its sensitizing effect on the weak chemiluminescence (CL) reaction between Na<SUB>2</SUB>SO<SUB>3</SUB> and acidic KMnO<SUB>4</SUB>. Under optimum experimental conditions, the CL intensity was linearly related to the concentration of laevodopa from 3.4 × 10<SUP>–8</SUP> to 2.4 × 10<SUP>–5</SUP> mol/L and the detection limit was 1.1 × 10<SUP>–8</SUP> mol/L (s:n = 3). The relative standard deviation (RSD) of the proposed method calculated from 20 replicate injection of 3 × 10<SUP>–7</SUP> mol/L laevodopa was 3.3%. The correlation coefficient was 0.997. The method was successfully applied to the determination of laevodopa in commercial pharmaceutical formulations and spiked urine samples. Copyright © 2008 John Wiley & Sons, Ltd.</P>
Alam, Seikh Mafiz,Jeon, Chi-Wan,Karim, Mohammad Mainul,Lee, Sang-Hak,Wabaidur, Saikh Mohammad,Suh, Yeoun-Suk,Chung, Hye-Young Korean Chemical Society 2009 Bulletin of the Korean Chemical Society Vol.30 No.1
A rapid and sensitive chemiluminescence (CL) method using flow-injection (FI) has been developed for the determination of mandelic acid which is based on the enhancement of mandelic acid to the CL intensity of ${Ru(bipy)_{3}}^{2+}$-Ce(IV) system. The enhancement effect was dependent on the concentration of mandelic acid, based on which, CL system was established for the determination of mandelic acid. The concentrations of ${Ru(bipy)_{3}}^{2+}$+, Ce(IV), and $H_2SO_4$ were optimized. Under the optimum experimental conditions, the linear range and detection limit are 1.46-342.0 ${\mu}g/ml$ and 0.072 ${\mu}g/ml$, respectively. The correlation coefficient (R) was 0.99732. The utility of this method was demonstrated by determining mandelic acid in capsules and human urine sample.
Seikh Mafiz Alam,Chi Wan Jeon,Mohammad Mainul Karim,이상학,Saikh Mohammad Wabaidur,Yeoun Suk Suh,정혜영 대한화학회 2009 Bulletin of the Korean Chemical Society Vol.30 No.1
A rapid and sensitive chemiluminescence (CL) method using flow-injection (FI) has been developed for the determination of mandelic acid which is based on the enhancement of mandelic acid to the CL intensity of Ru(bipy) 3 2+-Ce(IV) system. The enhancement effect was dependent on the concentration of mandelic acid, based on which, CL system was established for the determination of mandelic acid. The concentrations of Ru(bipy)3 2+, Ce(IV), and H2SO4 were optimized. Under the optimum experimental conditions, the linear range and detection limit are 1.46-342.0 μg/mL and 0.072 μg/mL, respectively. The correlation coefficient (R) was 0.99732. The utility of this method was demonstrated by determining mandelic acid in capsules and human urine sample.