[Microwave-assisted digestion with atomic absorption spectrometry for determination of Pb, Cd, Cu, Fe, Zn and Mn in food and assessment of uncertainty of analytical results].
An AAS method for the determination of trace amount of Pb, Cd, Cu, Fe, Mn and Zn in food was established, and the uncertainty of the analytical results was assessed in the present paper. Microwave-assisted digestion technique was used to prevent the elements from volatile losses and to reduce the blank. Fe, Mn, Cu and Zn were determined by flame AAS, and Pb and Cd were determined by using graphite furnace AAS. A National Standard Material GBW 07602 (GSV-1) was analyzed and the results were in accordance with the certificate values, verifying the accuracy and the precision of the proposed method. The uncertainty of the analytical results was assessed on the basis of the requirements of the ISO documents. Uncertainty sources from all procedures were evaluated.
Yang
Feng-Hua
FH
Zhejiang Huzhou Centre for Disease Control and Prevention, Huzhou 313000, China. yfh0617@126.com
D000818:Animals; D002104:Cadmium / Q000032:analysis; D003300:Copper / Q000032:analysis; D005504:Food Analysis / Q000379:methods*; D007501:Iron / Q000032:analysis; D007854:Lead / Q000032:analysis; D008345:Manganese / Q000032:analysis; D008460:Meat / Q000032:analysis; D019216:Metals, Heavy / Q000032:analysis*; D008872:Microwaves; D015203:Reproducibility of Results; D017747:Seafood / Q000032:analysis; D013054:Spectrophotometry, Atomic / Q000379:methods*; D015032:Zinc / Q000032:analysis
D019216:Metals, Heavy; D002104:Cadmium; D007854:Lead; D008345:Manganese; D003300:Copper; D007501:Iron; D015032:Zinc