Atomic absorption spectrometry for the quantification of cadmium in thermoformed and biodegradable flexible films made from cassava (Manihot esculenta crantz)
| Autor: | Roberto Julián Del Castillo, Olga Lucía Hoyos-Saavedra, Diana María Chito-Trujillo, Jose Luis Arciniegas-Herrera, Maite Rada-Mendoza |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Cadmium
Materials science Starch Manihot esculenta food and beverages chemistry.chemical_element 04 agricultural and veterinary sciences 02 engineering and technology 021001 nanoscience & nanotechnology Condensed Matter Physics 040401 food science Biodegradable polymer law.invention chemistry.chemical_compound 0404 agricultural biotechnology chemistry law Ceramics and Composites Graphite Absorption (chemistry) Composite material 0210 nano-technology Atomic absorption spectroscopy Thermoforming Nuclear chemistry |
| Zdroj: | Journal of Thermoplastic Composite Materials. 34:657-670 |
| ISSN: | 1530-7980 0892-7057 |
| DOI: | 10.1177/0892705719850612 |
| Popis: | A simple method for determining the presence of cadmium (Cd) in thermoformed and biodegradable flexible films and flour and starch samples from cassava, using graphite furnace-atomic absorption spectrometry (GF-AAS), is proposed. The biopolymers used in contact with foods can contain Cd due to contamination from the origin of the material used to make them. The nitric: perchloric acid digestion with reflux was optimized, and the statistical quality parameters were standardized. The GF-AAS instrumental conditions and the graphite furnace heating program were adjusted through pyrolysis and atomization curves, and the optimal temperatures were 530 and 1750°C, respectively. In addition, under optimal conditions, the working range was from 0.1 µg/L to 1.0 µg/L, with limits of detection and quantification of 0.02 and 0.07 µg/L, respectively. The precision was evaluated using intermediate precision and repeatability of the method, which showed standard deviations of 1.6–4.8% and 2.1–4.8%, respectively. The percentage of recovery of Cd ranged from 96.2% to 97.3%. The results obtained support the suitability of the method for determining the presence of Cd in these samples. Cd concentrations in flexible films and starch were below the quantification limit. The other samples (thermoformed and flours) contained less than 1 mg/kg (maximum level set by the NTC 4096), indicating that these polymers meet this standard and therefore can be used for food containers and packaging for fresh fruits and vegetables. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|