Atomic Absorption in Food Analysis — Special Techniques for Traces of Heavy Metals
Atomic absorption spectrophotometry (AAS) provides one of the most useful and convenient means for the determination of metallic elements in solution from a wide variety of sample types. The basic requirement is that the element of interest be solubilized either in aqueous or certain organic solvents for subsequent aspiration into the flame, whereby the atomic absorption (AA) signal is measured. This general sampling technique is perfectly adequate for most applications down to the parts per million level. At the sub parts per million level some form of sample preconcentration and clean-up may be necessary. This is usually accomplished by chelation and extraction into an organic solvent.
KeywordsAtomic Absorption Atomic Absorption Spectrophotometry Food Analysis Methyl Isobutyl Ketone Condensed Milk
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