title: Chemiluminescent determination of H2O2 using 4-(1,2,4-triazol-1-yl)phenol as an enhancer based on the immobilization of horseradish peroxidase onto magnetic beads.
abstract: This article describes the employment of a novel p-phenol derivative, 4-(1,2,4-triazol-1-yl)phenol (TRP), as a highly potent signal enhancer of the luminol-hydrogen peroxide (H(2)O(2))-horseradish peroxidase (HRP) chemiluminescence (CL) system. The CL reaction conditions were optimized, and the enhancement characteristics of TRP were compared with those of p-iodophenol (PIP). TRP produced a strong enhancement of the CL with the effect of prolonging the light emission. The developed system was then applied to the determination of H(2)O(2) with immobilized HRP using magnetic beads as a solid support. The linear range for H(2)O(2) was 2.0x10(-6) to 1.0x10(-3) M. The detection limit for H(2)O(2) was 2.0x10(-6) M. The proposed sensor was applied successfully to the determination of H(2)O(2) in rainwater.
authors.affiliation: Key Laboratory of Eco-chemical Engineering, Ministry of Education, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, China. yangxiaoyan_zh@126.com
authors.forename: Xiaoyan
authors.initials: X
authors.lastname: Yang
authors.forename: Yingshu
authors.initials: Y
authors.lastname: Guo
authors.forename: Zhenhua
authors.initials: Z
authors.lastname: Mei
mesh_terms: D031215:Armoracia / Q000201:enzymology*; D015374:Biosensing Techniques; D002138:Calibration; D004800:Enzymes, Immobilized / Q000378:metabolism*; D005618:Fresh Water / Q000737:chemistry; D006735:Horseradish Peroxidase / Q000378:metabolism*; D006861:Hydrogen Peroxide / Q000032:analysis* / Q000737:chemistry / Q000378:metabolism*; D008163:Luminescent Measurements / Q000379:methods*; D008280:Magnetics; D015394:Molecular Structure; D010636:Phenols / Q000737:chemistry*; D014230:Triazoles / Q000737:chemistry*
chemical_list: C543856:4-(1,2,4-triazol-1-yl)phenol; D004800:Enzymes, Immobilized; D010636:Phenols; D014230:Triazoles; D006861:Hydrogen Peroxide; D006735:Horseradish Peroxidase