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은 나노입자를 이용한 화학발광법에 의한 L-alanine의 정량
조해진 ( Hae Jin Jo ),장택균 ( Taek Gyun Jang ),최종하 ( Jong Ha Choi ),서정기 ( Jung Kee Suh ),전치완 ( Chi Wan Jeon ),김영호 ( Young Ho Kim ),이상학 ( Sang Hak Lee ) 한국공업화학회 2011 응용화학 Vol.15 No.1
A chemiluminescent method with silver nanoparticles for determination of L-alanine has been presented. The chemilumiscence intensity was further enhanced by silver nanoparticles in the luminol system by its catalytic role. The silver nanoparticles enhanced chemiluminescent method is applicable for the determination of an amino acid such as alanine. When alanine was introduced to the luminol system with silver nanoparticles, chemiluminescence intensity was reduced with the concentration of the added alanine. The effects of pH, concentrations of luminol, hydrogen peroxide and silver nanoparticles on the chemiluminescence intensity were investigated. The calibration curve for L-alanine was linear over the range from 6.60×10(-8) M to 4.00×10(-7) M, coefficient of correlation was 0.996 and detection limit was 3.5×10(-9) M under the optimal conditions of 4.0×10(-3) M, 4.0×10(-2) M, 4.0×10(-4) M, 12.8 for the concentration of luminol, H2O2, silver nanoparticles and pH, respectively.
금 나노입자의 증감효과를 이용한 화학발광법적 Perphenazine 정량
( Al Mahmnur Alam ),( Mohammad Kamruzzaman ),이상학 ( Sang Hak Lee ),김영호 ( Young Ho Kim ),장택균 ( Taek Gyun Jang ),홍석주 ( Suk Joo Hong ),오상협 ( Sang Hyub Oh ) 한국공업화학회 2011 응용화학 Vol.15 No.2
A rapid and sensitive chemiluminescence (CL) method was designed for the determination of trace amount of perphenazine (PERN) based on the gold nanoparticles enhanced luminol-H2O2-PERN system. The degree of enhancement of CL signal intensity of the system was proportional with the concentration of PERN. Under optimum experimental conditions, the linearity of CL signal intensity was observed in the range of 3.5×10-9 to 2.0×10-7 mol/L (r2= 0.9995) with a detection limit of 1.37×10-9 mol/L. Precision of the method was tested at the concentration level of 1.0×10-7 mol/L for 8 replicate measurements giving value of RSD 2.25%.
Fe(2)-DTPA 착물의 촉매작용을 이용한 루미놀 화학발광 시스템의 선택적 Fe(2) 정량
이상학 ( Sang Hak Lee ),김경민 ( Kyung Min Kim ),홍석주 ( Suk Joo Hong ),김규만 ( Gyu Man Kim ),조해진 ( Hae Jin Jo ),장택균 ( Taek Gyun Jang ),김영호 ( Young Ho Kim ) 한국공업화학회 2011 응용화학 Vol.15 No.2
A sensitive and selective determination method of Fe(Ⅱ) ion by luminol-H2O2 system using a chelating reagent has been presented. A metal ion-chelating ligand complex such as Fe(Ⅱ)-diethylenetriamine pentaacetic acid (DTPA) produced higher chemiluminescence (CL) intensity as well as longer lifetime in luminol-H2O2 system than metal exist as free ions. Furthermore, the catalytic activity of Cu(Ⅱ) and Pb (Ⅱ) complexes with chelating reagents in luminol-H2O2 system was lost since chelating reagents act as a masking agent although free Cu(Ⅱ) and Pb(Ⅱ) ions have high catalytic activity. On the optimized conditions, the calibration curve of Fe(Ⅱ) ion was linear over the range from 1.0×10-7 to 2.0ⅹ10-5 M with correlation coefficient of 0.996. The detection limit was calculated to be 4.0×10-8 M.