Determination of cadmium, aluminium, and copper in beer and products used in its manufacture by electrothermal atomic absorption spectrometry.
Procedures were developed for determining cadmium, aluminium, and copper in beer and the products used in its manufacture by electrothermal atomic absorption spectrometry. Beer samples were injected into the furnace and solid samples were introduced as suspensions after preparation in a medium containing hydrogen peroxide, nitric acid, and ammonium dihydrogen phosphate for cadmium atomization. Calibration was performed with aqueous standards, and characteristic masses and detection limits were, respectively, 1 and 0.3 pg for cadmium, 18 and 5.4 pg for aluminium, and 5.6 and 6.8 pg for copper. Different samples of beer, wort, brewer's yeast, malt, raw grain, and hops were analyzed by the proposed procedures. Cadmium was found in low concentrations (0.001-0.08 microg/g and 0-1.3 ng/mL); copper (3-13 microg/g and 25-137 ng/mL) and aluminium (0.6-9 microg/g and 0.1-2 microg/mL) were found at higher levels. The reliability of the procedure was confirmed by comparing the results obtained with others based on microwave oven sample digestion, and by analyzing several certified reference materials.
Viñas
Pilar
P
University of Murcia, Department of Analytical Chemistry, Faculty of Chemistry, Spain.
Aguinaga
Nerea
N
López-García
Ignacio
I
Hernandez-Córdoba
Manuel
M
D000535:Aluminum / Q000032:analysis*; D001515:Beer / Q000032:analysis*; D002104:Cadmium / Q000032:analysis*; D002138:Calibration; D003300:Copper / Q000032:analysis*; D013054:Spectrophotometry, Atomic / Q000379:methods*; D013535:Suspensions
D013535:Suspensions; D002104:Cadmium; D003300:Copper; D000535:Aluminum