Toxic Trace Metals in Edible Oils by Graphite Furnace Atomic Absorption Spectrophotometry
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چکیده
Graphite furnace atomic absorption spectrophotometry (GFAAS) has been widely applied to the determination of trace elements in food due to its selectivity, simplicity, high sensitivity, and its capability for accurate determinations in a wide variety of matrices. Edible oils are generally low in trace element concentrations, however, metals such as arsenic (As), lead (Pb), cadmium (Cd), chromium (Cr), and selenium (Se) can be found and are known for their toxicities which affect the health of consumers. The determination of toxic elements from naturally occurring or production-contamination sources in oils can be determined by using GFAAS or inductively coupled plasma mass spectrometry (ICP-MS). When only a few elements are being analyzed, GFAAS is the preferred choice. It is easy to learn, faster in setting up, and simpler to use than ICP-MS. GFAAS is also lower in initial capital investment and has a lower operating and maintenance cost. Sample pretreatment procedures for edible oils are normally required prior to instrumental analysis in order to eliminate the organic matrix. Wet, dry or microwave digestion, dilution with organic solvent, and extraction methods can be time consuming and require more operator training than a direct analysis method. Atomic Absorption a p p l i c a t i o n n o t e
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