A new system for the spectrophotometric determination of trace amounts of nitrite in environmental samples
A selective and rapid spectrophotometric method for the determination of nitrite is presented. It is based on the reaction of nitrite with p-nitroaniline in acid medium to form diazonium ion, which is coupled with ethoxyethylenemaleic ester or ethylcyanoacetate in basic medium to form azo dyes, show...
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| Format: | Article |
| Language: | English |
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Sociedade Brasileira de Química
2006-01-01
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| Series: | Journal of the Brazilian Chemical Society |
| Subjects: | |
| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532006000300022 |
| _version_ | 1828541793424113664 |
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| author | Cherian Tom Narayana Badiadka |
| author_facet | Cherian Tom Narayana Badiadka |
| author_sort | Cherian Tom |
| collection | DOAJ |
| description | A selective and rapid spectrophotometric method for the determination of nitrite is presented. It is based on the reaction of nitrite with p-nitroaniline in acid medium to form diazonium ion, which is coupled with ethoxyethylenemaleic ester or ethylcyanoacetate in basic medium to form azo dyes, showing absorption maxima at 439 and 465 nm respectively. The method obeys Beer's law in the concentration range of 0.5-16 µg mL-1 of nitrite with ethoxyethylenemaleic ester and 0.2-18 µg mL-1 of nitrite with ethylcyanoacetate. The molar absorptivity and Sandell's sensitivity of p-nitroaniline-ethoxyethylenemaleic ester and p-nitroaniline-ethylcyanoacetate azo dyes are 5.04 X 10(4) L mol-1cm-1, 0.98 X 10-2 µg cm-2 and 1.21 X 10(4) L mol-1 cm-1, 0.98 X 10-2 µg cm-2 respectively. The optimum reaction conditions and other analytical parameters were evaluated. The method was successfully applied to the determination of nitrite in various water samples and soil samples. |
| first_indexed | 2024-12-12T01:46:23Z |
| format | Article |
| id | doaj.art-0b9430ec4ebf4af98435c3add919d12e |
| institution | Directory Open Access Journal |
| issn | 0103-5053 1678-4790 |
| language | English |
| last_indexed | 2024-12-12T01:46:23Z |
| publishDate | 2006-01-01 |
| publisher | Sociedade Brasileira de Química |
| record_format | Article |
| series | Journal of the Brazilian Chemical Society |
| spelling | doaj.art-0b9430ec4ebf4af98435c3add919d12e2022-12-22T00:42:35ZengSociedade Brasileira de QuímicaJournal of the Brazilian Chemical Society0103-50531678-47902006-01-01173577581A new system for the spectrophotometric determination of trace amounts of nitrite in environmental samplesCherian TomNarayana BadiadkaA selective and rapid spectrophotometric method for the determination of nitrite is presented. It is based on the reaction of nitrite with p-nitroaniline in acid medium to form diazonium ion, which is coupled with ethoxyethylenemaleic ester or ethylcyanoacetate in basic medium to form azo dyes, showing absorption maxima at 439 and 465 nm respectively. The method obeys Beer's law in the concentration range of 0.5-16 µg mL-1 of nitrite with ethoxyethylenemaleic ester and 0.2-18 µg mL-1 of nitrite with ethylcyanoacetate. The molar absorptivity and Sandell's sensitivity of p-nitroaniline-ethoxyethylenemaleic ester and p-nitroaniline-ethylcyanoacetate azo dyes are 5.04 X 10(4) L mol-1cm-1, 0.98 X 10-2 µg cm-2 and 1.21 X 10(4) L mol-1 cm-1, 0.98 X 10-2 µg cm-2 respectively. The optimum reaction conditions and other analytical parameters were evaluated. The method was successfully applied to the determination of nitrite in various water samples and soil samples.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532006000300022spectrophotometrydiazotizationnitritep-nitroanilineethoxyethylenemaleic esterethylcyanoacetate |
| spellingShingle | Cherian Tom Narayana Badiadka A new system for the spectrophotometric determination of trace amounts of nitrite in environmental samples Journal of the Brazilian Chemical Society spectrophotometry diazotization nitrite p-nitroaniline ethoxyethylenemaleic ester ethylcyanoacetate |
| title | A new system for the spectrophotometric determination of trace amounts of nitrite in environmental samples |
| title_full | A new system for the spectrophotometric determination of trace amounts of nitrite in environmental samples |
| title_fullStr | A new system for the spectrophotometric determination of trace amounts of nitrite in environmental samples |
| title_full_unstemmed | A new system for the spectrophotometric determination of trace amounts of nitrite in environmental samples |
| title_short | A new system for the spectrophotometric determination of trace amounts of nitrite in environmental samples |
| title_sort | new system for the spectrophotometric determination of trace amounts of nitrite in environmental samples |
| topic | spectrophotometry diazotization nitrite p-nitroaniline ethoxyethylenemaleic ester ethylcyanoacetate |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532006000300022 |
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