Synthesis and Identification of Heavy Metal Lead Artificial Antigen

Lead ions were coupled to protein carrier bovine serum albumin (BSA) and keyhole limpet hemocyanin (KLH) respectively. Diethylene Triamine Pentacetate Acid (DTPA) was used as bifunctional chelator. Pb-DTPA-Carrier protein, DTPA-Carrier protein and carrier protein were detected qualitatively with ICP-MS, UV spectrophotometer and electrophoresis. It turns out that the Pb-DTPA-Carrier protein contains certain concentration of heavy metal ion, the maximum ultraviolet absorption peak value of Pb-DTPA-Carrier protein significantly higher than that of DTPA-Carrier protein and carrier protein, and the electrophoresis reveals more vague bands of Pb-DTPA-Carrier protein with slower migrations speed comparing to the bands of the DTPA-Carrier protein and carrier protein. The result indicated that the artificial antigen for lead was successfully synthesized.