Synthesis of hapten and antigens
0.2 g of APA was dissolved in 10 mL of anhydrous
methanol, and 5 mL of SOCl2 was then added drop by drop.
After refluxing for 12 h at 70 °C, the solvent was rotary
evaporated and the residue was purified by silica gel column
chromatography. The obtained white powder hapten ADMP
was identified by NMR and MS. Subsequently, hapten was
coupled to carrier proteins bovine serum albumin (BSA) and
ovalbumin (OVA) to get immunogen ADMP-BSA and
coating antigen ADMP-OVA respectively through
diazotization metho