| Journal: | Quimica nova |
| Database: | PERIÓDICA |
| System number: | 000313207 |
| ISSN: | 0100-4042 |
| Authors: | Gomes, Marcos S1 Trevizan, Lilian C Nobrega, Joaquim A Gouveia, Sandro T2 Rocha, Fabio R.P3 |
| Institutions: | 1Universidade Federal de Sao Carlos, Departamento de Quimica, Sao Carlos, Sao Paulo. Brasil 2Universidade Federal do Ceara, Departamento de Fisico-Quimica e Quimica Analitica, Fortaleza, Ceara. Brasil 3Universidade de Sao Paulo, Instituto de Quimica, Sao Paulo. Brasil |
| Year: | 2006 |
| Season: | Jul |
| Volumen: | 29 |
| Number: | 4 |
| Pages: | 868-871 |
| Country: | Brasil |
| Language: | Portugués |
| Document type: | Artículo |
| Approach: | Aplicado, descriptivo |
| English abstract | Simple experiments are proposed for measuring molecular absorption of chromate and dichromate ions using an atomic absorption spectrometer. The experiments can help undergraduate students in instrumental analysis courses understand important aspects involving conceptual and instrumental similarities and differences between frequently used analytical techniques. Hollow cathode lamps were selected with wavelengths in the region of molecular absorption of chromate and dichromate. Calibration curves were obtained and the linear dynamic range was evaluated. Results were compared with those obtained in a molecular absorption spectrometer. The molar absorptivities obtained were also compared |
| Disciplines: | Química |
| Keyword: | Química analítica, Análisis instrumental, Espectrometría de absorción atómica, Absorción molecular |
| Keyword: | Chemistry, Analytical chemistry, Instrumental analysis, Atomic absorption spectrometry, Molecular absorption |
| Full text: | Texto completo (Ver HTML) |
