Abstract

DEL CASTILLO R, ROBERTO JULIÁN; RADA-MENDOZA, MAITE DEL PILAR; HOYOS S, OLGA LUCIA  and  VILLADA C, HECTOR SAMUEL. QUANTIFICATION OF MERCURY IN THERMOFORMED AND FLEXIBLE FILMS BIODEGRADABLE MADE FROM CASSAVA (Manihot esculenta Crantz) BY ATOMIC ABSORPTION SPECTROMETRY. Rev.Bio.Agro [online]. 2012, vol.10, n.2, pp.227-235. ISSN 1692-3561.

The mercury content of seven thermoformed and six biodegradable flexible films samples were evaluated by atomic absorption spectrometry with cold vapor; before the experiments, the statistical quality parameters were implemented and standardized (Detection and quantification limit, linear range, calibration sensitivity, precision and accuracy), who established the performance of the method. The thermoformed were digested with a mixture HNO3:HClO4, ratio 3:1, by 3 hours at 70°C and the flexible films by 45 minutes at 50°C. The calibration curve at 253.7 nm was the quantification method, obtaining concentrations of mercury in the range from not detectable to 60 µg/L in thermoformed and not detectable to 6 µg/L in the flexible films.

Keywords : Biodegradable materials; Cassava; Atomic absorption spectrometry-cold vapour; Mercury.

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