Microwave-Assisted Solid Sampling Analysis Coupled to Flame Furnace Atomic Absorption Spectrometry for Cd and Pb Determination in Food-Contact Polymers

Microwave-assisted solid sampling analysis coupled to flame furnace atomic absorption spectrometry (MW-SS-FF-AAS) was used for Cd and Pb determination in food-contact polymer samples, with the aim of minimizing reagents laboratory waste. Operational parameters, such as FF tube design, oxygen flow rate, stoichiometry, sample mass, among others, were evaluated optimized. Calibration performed using only reference solutions, limits quantification 1.7 4.6 μg g−1 Pb, respectively. Accuracy assessed by certified materials (CRMs), comparison results obtained inductively plasma mass after microwave-assisted wet digestion. The MW-SS-FF-AAS CRMs showed no statistical difference values, good agreement observed digestion method. method considered suitable polymers. concentrations analyzed samples varied from <1.7 628 g−1, <4.6 614 As is not necessary, use concentrated acids can be avoided proposed method, greatly reducing waste generation.