Citation: DAI Ting-Ting, LIN Hua-Ping, DUAN Jie, XU Xiang-Dong, SHI Hong-Mei. Determination of Sulfonamides Residues in Food by Capillary Zone Electrophoresis-Chemiluminescence Method[J]. Chinese Journal of Analytical Chemistry, ;2016, 44(5): 747-753. doi: 10.11895/j.issn.0253-3820.150854 shu

Determination of Sulfonamides Residues in Food by Capillary Zone Electrophoresis-Chemiluminescence Method

School of Public Health, Hebei Medical University, Shijiazhuang 050017, China

Received Date: 26 October 2015
Revised Date: 22 December 2015

Fund Project: This work was supported by the National Natural Science Foundation of China (Nos. 81273128, 81402723)

Based on sulfonamides inhibited the chemiluminescence (CL) intensities of the system consisting of Ag(Ⅲ) complexes with Luminol (Lu) in basic medium, a method for capillary electrophoresis (CE)-CL separation and determination of sulfamethoxazole (SMZ), sulfadimethoxine (SDM) and sulfathiazole (ST) was established. The three kinds of sulfonamides were separated by capillary electrophoresis, and reacted with Ag(Ⅲ) complexes-Luminol CL system, respectively. In the relative migration time, the relative CL intensity was quantitative and the standard curve method was used to determine the content of the analytes in the sample. The conditions for the separation and chemiluminescence detection system were all optimized. Under the optimized conditions, the linear ranges for the determination of SMZ, SDM and ST were 2.0-200.0 μg/mL (r>0.9977), with detection limits (S/N=3) of 0.33, 0.20 and 0.034 μg/mL, respectively. Relative standard deviation (RSD) values for the peak height were 1.3% to 1.9% (n=7). The proposed method was applied to the determinations of sulfonamides residues in pork, chicken, milk samples with satisfactory results.
- Capillary electrophoresis,
- Chemiluminescence,
- Silver (Ⅲ) complex,
- Sulfonamides
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