LI Lu,YANG Jin⁃yi,WANG Yu,et al.Development of a Chemiluminescence Enzyme Immunoassay Method for Detection of Tiamulin Residues in Eggs[J].Journal of Instrumental Analysis,2022,41(01):115-120.
LI Lu,YANG Jin⁃yi,WANG Yu,et al.Development of a Chemiluminescence Enzyme Immunoassay Method for Detection of Tiamulin Residues in Eggs[J].Journal of Instrumental Analysis,2022,41(01):115-120. DOI: 10.19969/j.fxcsxb.21092903.
Development of a Chemiluminescence Enzyme Immunoassay Method for Detection of Tiamulin Residues in Eggs
A chemiluminescence enzyme immunoassay(CLEIA) method was established for the monitoring of tiamulin residues in egg samples,based on a monoclonal antibody with excellent specificity and sensitivity obtained by synthesizing antigen to immunize BALB/c mice and cell experiments.The optimal conditions were finalized as follows:the coating antigen concentration:0.26 μg/mL,the antibody concentration:0.94 µg/mL,the reaction buffer system:PBS(0.02 mol/L,pH 7.4),and the dilution buffer,the concentration and the reaction time for the enzyme-labeled secondary antibody were PBST buffer,2 µg/mL and 40 min,respectively.Under the optimal conditions,a CLEIA method for tiamulin detection was established,with an IC,50, of 0.54 ng/mL,a limit of detection(LOD,IC,10,) of 0.03 ng/mL,and a linear detection range (IC,20,-IC,80,) of 0.17-1.74 ng/mL.There was no obvious cross-reaction between the method and the other structural and functional analogs of tiamulin.The CLEIA method was used for the detection of real egg samples.The spiked recoveries ranged from 100% to 118%,with the relative standard deviations(RSDs) less than 10%. The test results of the developed CLEIA had a good correlation with those of HPLC-MS/MS(,r,2, = 0.998 7),indicating that the method was suitable for the detection of tiamulin residues in egg samples.
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