Resumo

ALVIRA M, LEIDY FERNANDA; RADA-MENDOZA, MAITE DEL PILAR; HOYOS S, OLGA LUCÍA  e  VILLADA C, HECTOR SAMUEL. QUANTIFICATION OF ARSENIC BY ATOMIC ABSORPTION SPECTROMETRY IN FLEXIBLE THERMOFORMED AND BIODEGRADABLE FILMS. Rev.Bio.Agro [online]. 2012, vol.10, n.1, pp.157-165. ISSN 1692-3561.

The arsenic concentration of seven thermoformed and six biodegradable flexible films samples were evaluated by atomic absorption spectrometry with generator hydride; the calibration curve at 193,7 nm was the quantification method. Before the experiments, the acid digestion with reflux was optimized (HNO3: HClO4, ratio 3:1, 70°C, 3 hours for thermoformed and 45 minutes for flexible films) and the statistical quality parameters were implemented and standardized (detection and quantification limit, linear range, calibration sensitivity, precision and accuracy). The results were analyzed using SPSS. Arsenic concentrations in thermoformed were detectable in the order of parts per billion whereas flexible films were not detectable. Today, there is no current legislation to establish the permissible values of arsenic for the biopolymers analyzed.

Palavras-chave : Biodegradable materials; Cassava; Atomic absorption spectrometry.

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