Chromium speciation in leather samples: an experiment using digital images, mobile phones and environmental concepts
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| Format: | Artículo científico |
| Language: | en |
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Universidade Estadual Paulista Júlio de Mesquita Filho
2019
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| _version_ | 1876450527488770048 |
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| author | Vinícius Costa |
| author_facet | Vinícius Costa |
| contents | Chromium speciation in leather samples: an experiment using digital images, mobile phones and environmental concepts Vinícius Costa Ariane Neiva Edenir Pereira-Filho Química PhotoMetrix mobile phone digital image leather and Cr(VI) This study proposes a new and simple method for Cr speciation and Cr(VI) determination in leather samples using digital images. The experiments were performed using a mobile phone and a free app called PhotoMetrix that was used to obtain and process data. The results obtained from PhotoMetrix were compared to reference methods using UV−Vis. A statistical evaluation between both proposed and the reference methods using two-sample t-test did not show a significant difference at a 95% confidence level. Bovine leather samples (4 samples) tanned with Cr salts and ovine leather samples (3 samples) tanned with vegetable tannin were analyzed. The proposed method presented limits of detection (LOD) and quantification (LOQ) of 0.6 and 2 mg/kg, respectively. In addition, the proposed method using PhotoMetrix and digital images can provide undergraduate students an opportunity to learn topics such as quantitative analyses, environmental chemistry, speciation chemistry, image processing and treatment of statistical data. The results demonstrated that the proposed method can be applied to routine analyses and in experimental analytical chemistry courses. 2019 artículo científico 0100-4670 https://www.redalyc.org/articulo.oa?id=42957662007 https://www.redalyc.org/journal/429/42957662007/ https://www.redalyc.org/journal/429/42957662007/html/ https://www.redalyc.org/journal/429/42957662007/42957662007.epub https://www.redalyc.org/journal/429/42957662007/movil https://doi.org/10.26850/1678-4618eqj.v44.1.2019.p40-52 en http://www.redalyc.org/revista.oa?id=429 Eclética Química application/pdf Universidade Estadual Paulista Júlio de Mesquita Filho Eclética Química (Brasil) Num.1 Vol.44 |
| format | Artículo científico |
| id | redalyc_42957662007 |
| institution | Redalyc |
| language | en |
| publishDate | 2019 |
| publisher | Universidade Estadual Paulista Júlio de Mesquita Filho |
| spellingShingle | Chromium speciation in leather samples: an experiment using digital images, mobile phones and environmental concepts Vinícius Costa Química PhotoMetrix mobile phone digital image leather and Cr(VI) Chromium speciation in leather samples: an experiment using digital images, mobile phones and environmental concepts Vinícius Costa Ariane Neiva Edenir Pereira-Filho Química PhotoMetrix mobile phone digital image leather and Cr(VI) This study proposes a new and simple method for Cr speciation and Cr(VI) determination in leather samples using digital images. The experiments were performed using a mobile phone and a free app called PhotoMetrix that was used to obtain and process data. The results obtained from PhotoMetrix were compared to reference methods using UV−Vis. A statistical evaluation between both proposed and the reference methods using two-sample t-test did not show a significant difference at a 95% confidence level. Bovine leather samples (4 samples) tanned with Cr salts and ovine leather samples (3 samples) tanned with vegetable tannin were analyzed. The proposed method presented limits of detection (LOD) and quantification (LOQ) of 0.6 and 2 mg/kg, respectively. In addition, the proposed method using PhotoMetrix and digital images can provide undergraduate students an opportunity to learn topics such as quantitative analyses, environmental chemistry, speciation chemistry, image processing and treatment of statistical data. The results demonstrated that the proposed method can be applied to routine analyses and in experimental analytical chemistry courses. 2019 artículo científico 0100-4670 https://www.redalyc.org/articulo.oa?id=42957662007 https://www.redalyc.org/journal/429/42957662007/ https://www.redalyc.org/journal/429/42957662007/html/ https://www.redalyc.org/journal/429/42957662007/42957662007.epub https://www.redalyc.org/journal/429/42957662007/movil https://doi.org/10.26850/1678-4618eqj.v44.1.2019.p40-52 en http://www.redalyc.org/revista.oa?id=429 Eclética Química application/pdf Universidade Estadual Paulista Júlio de Mesquita Filho Eclética Química (Brasil) Num.1 Vol.44 |
| title | Chromium speciation in leather samples: an experiment using digital images, mobile phones and environmental concepts |
| topic | Química PhotoMetrix mobile phone digital image leather and Cr(VI) |
| url | https://www.redalyc.org/articulo.oa?id=42957662007 https://www.redalyc.org/journal/429/42957662007/ https://www.redalyc.org/journal/429/42957662007/html/ https://www.redalyc.org/journal/429/42957662007/42957662007.epub https://www.redalyc.org/journal/429/42957662007/movil https://doi.org/10.26850/1678-4618eqj.v44.1.2019.p40-52 |