ICP-MS Determination of Aluminium in Wheaten Foods

Samples of wheaten food were pretreated in two modes of digestion,i.e.the microwave digestion and digestion under normal pressure.The sample solution obtained after dilution was analyzed by ICP-MS using Sc as internal standard.Linearity range of Al was obtained between 10.0-250.0 μg·L-1,with detection limit (3s) of 3.75 μg·L-1 and lower limit of determination (10 s) of 12.5 μg·L-1.It was found that accuracy and precision of results obtained by both the digestion methods were equally satisfactory.Values of recovery and RSD′s (n=8) found were in the range of 84.4%-101.2%,3.0%-7.1% by microwave digestion,and 85.7%-95.5%,3.4%-6.6% by digestion under normal pressure.