Objective To detect cadmium in environmental and food samples by graphite furnace atomic absorption spectroscopy （GFAAS） and inductively coupled plasma atomic emission spectroscopy （ICPAES）. Methods An indirect co...Objective To detect cadmium in environmental and food samples by graphite furnace atomic absorption spectroscopy （GFAAS） and inductively coupled plasma atomic emission spectroscopy （ICPAES）. Methods An indirect competitive enzyme-linked immunosorbent assay （IC-ELISA） was developed based on a cadmium-specific monoclonal antibody. IC-ELISA for cadmium in environmental and food samples was evaluated. Results IC-ELISA showed an IC50 of 45.6 μg/L with a detection limit of 1.95 μg/L for cadmium, and showed a mean recovery ranging 97.67%-107.08%. The coefficient of variations for intra- and interassay was 3.41%-6.61% and 4.70%-9.21%, respectively. The correlation coefficient between IC-ELISA and GFAAS was 0.998. Conclusion IC-ELISA can detect and quantify cadmium residue in environmental or food samples.展开更多
基金supported by the Research Foundation of Science and Technology Project in Guangdong Province of China (No.2003C20409)Science and Technology Project in General Administration of Quality Supervision,Inspection and Quarantine of China(No. 2004IK062)
文摘Objective To detect cadmium in environmental and food samples by graphite furnace atomic absorption spectroscopy （GFAAS） and inductively coupled plasma atomic emission spectroscopy （ICPAES）. Methods An indirect competitive enzyme-linked immunosorbent assay （IC-ELISA） was developed based on a cadmium-specific monoclonal antibody. IC-ELISA for cadmium in environmental and food samples was evaluated. Results IC-ELISA showed an IC50 of 45.6 μg/L with a detection limit of 1.95 μg/L for cadmium, and showed a mean recovery ranging 97.67%-107.08%. The coefficient of variations for intra- and interassay was 3.41%-6.61% and 4.70%-9.21%, respectively. The correlation coefficient between IC-ELISA and GFAAS was 0.998. Conclusion IC-ELISA can detect and quantify cadmium residue in environmental or food samples.
