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Determination of Ti and Al in polypropylene by AAS and ICP-AES in the presence of Na

The atomic absorption spectrometry (AAS) method together with a N 2 O-C 2 H 2 flame was used for the determination of TI and and Al in a 10g-polypropylene sample, resulting in 2.25 to 25.0 μg/g (RSD= 8.90%) for Ti and 2.5 to 125 μg:G (RSD= 8.1%) for Al. For the inductively coupled plasma-atomic emission spectrometry (ICP-AES), only 1g samples of PP are needed, yet the accuracy of the determination is higher for both metals (RSD= 4.64% for Ti and RDS= 6.3% for Al). The detection limit obtained with AAS was 0.9 μg/mL for Ti (2.25 μg/g) and 1.0 μg/L for Al (2.50 μg/g). For ICP-AES, it was 0.04 μg/mL for Ti (1.0 μg/g) and 0.16 μg:mL for Al (4.00 μg/g)