Determination of trace lead elements in bulgy food by microwave digestion of sample and flame atomic absorption spectrometry
A comparison was made between microwave digestion and wet digestion methods for the determination of Pb in bulgy food with FAAS. And being concentrated by APDC-DDTC-MIBK system extraction. The optimum determination conditions are optimized and the test for the interferential elements that probably exist is conducted. Microwave digestion method with a close-vessel, the digestion could be done more rapidly and more effectively. The method could save reagents and display a lower background. The relative standard deviation is 1.5% to 2.4%. The respective recovery rate is 98.2% to 102.0%. The result of the process is satisfactory .