Sensitized chemiluminescence of 2-phenyl-4,5-di(2-furyl)-1H-imidazole/K₃Fe(CN)₆/propyl gallate system combining with solid-phase extraction for the determination of propyl gallate in edible oil.
In this paper, a novel chemiluminescence (CL) method has been developed for the determination of propyl gallate (PG). The proposed method was based on the enhancing effect of PG on the CL signal of 2-phenyl-4,5-di(2-furyl)-1H-imidazole (PDFI) and K3Fe(CN)6 reaction in an alkaline solution. Under the optimum conditions, the enhanced CL intensity was linearly related to the concentration of PG. The linear range of the calibration curve was 0.05-8 μg/mL, and the corresponding detection limit (3σ) was 0.036 μg/mL. The relative standard deviation for determining 1.0 μg/mL PG was 2.8% (n=11). The proposed method has been successfully applied to the determination of PG in edible oil. The edible oil samples were prepared by the solid-phase extraction (SPE) with a C18 column served as the stationary phase. Furthermore, the possible CL mechanism was also discussed briefly based on the photoluminescence (PL) and CL spectra.
State Key Laboratory of Urban Water Resource and Environment, School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, PR China; College of Chemistry, Jilin University, Changchun 130012, PR China. Electronic address: jingkanghit@163.com.
Jing
J
Kang
College of Chemistry, Jilin University, Changchun 130012, PR China.
Lu
L
Han
State Key Laboratory of Urban Water Resource and Environment, School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, PR China.
Zhonglin
Z
Chen
State Key Laboratory of Urban Water Resource and Environment, School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, PR China.
Jimin
J
Shen
State Key Laboratory of Urban Water Resource and Environment, School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, PR China. Electronic address: nanjun11@163.com.
Jun
J
Nan
College of Chemistry, Jilin University, Changchun 130012, PR China.
Yihua
Y
Zhang
D000975:Antioxidants / Q000737:chemistry*; D002138:Calibration; D002623:Chemistry Techniques, Analytical; D005292:Ferricyanides; D005504:Food Analysis / Q000379:methods*; D007093:Imidazoles / Q000737:chemistry*; D007501:Iron / Q000737:chemistry; D057230:Limit of Detection; D049449:Luminescence; D010938:Plant Oils / Q000032:analysis*; D011435:Propyl Gallate / Q000737:chemistry*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D052616:Solid Phase Extraction; D012996:Solutions
D000975:Antioxidants; D005292:Ferricyanides; D007093:Imidazoles; D010938:Plant Oils; D012996:Solutions; C029899:imidazole; D011435:Propyl Gallate; D007501:Iron; C028033:potassium ferricyanide
2-Phenyl-4,5-di(2-furyl)-1H-imidazole; Chemiluminescence; Edible oil; Propyl gallate; Solid-phase extraction