Determination of nitrite in foods by single-sweep polarography
In an acid medium, nitrite diazotized with p-rosaniline and then coupled with 8-hydroxyquinoline in a weak alkaline medium produces azo compounds. The azo compounds produce a very sensitive polarographic wave at -0.70 V (versus the saturated calomel electrode). The height of the peak is linear with...
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| Veröffentlicht in: | Journal of AOAC International 2002-03, Vol.85 (2), p.456-459 |
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| container_end_page | 459 |
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| container_issue | 2 |
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| container_title | Journal of AOAC International |
| container_volume | 85 |
| creator | Qiong, Li Tong, Zhan Yong, Luo Dandan, Song Guanghan, Lu |
| description | In an acid medium, nitrite diazotized with p-rosaniline and then coupled with 8-hydroxyquinoline in a weak alkaline medium produces azo compounds. The azo compounds produce a very sensitive polarographic wave at -0.70 V (versus the saturated calomel electrode). The height of the peak is linear with the concentration of nitrite in the range of 5 x 10(-9) to 5 x 10(-7) g/mL. The detection limit is 3 x 10(-9) g/mL. The electrochemical characteristics of the polarographic wave are also discussed. The method was used to determine nitrite in sausage. The results agree well with those obtained by spectrophotometry. |
| doi_str_mv | 10.1093/jaoac/85.2.456 |
| format | Article |
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The azo compounds produce a very sensitive polarographic wave at -0.70 V (versus the saturated calomel electrode). The height of the peak is linear with the concentration of nitrite in the range of 5 x 10(-9) to 5 x 10(-7) g/mL. The detection limit is 3 x 10(-9) g/mL. The electrochemical characteristics of the polarographic wave are also discussed. The method was used to determine nitrite in sausage. The results agree well with those obtained by spectrophotometry.</description><identifier>ISSN: 1060-3271</identifier><identifier>EISSN: 1944-7922</identifier><identifier>DOI: 10.1093/jaoac/85.2.456</identifier><identifier>PMID: 11990032</identifier><language>eng</language><publisher>Gaithersburg, MD: AOAC International</publisher><subject>Biological and medical sciences ; Food Analysis - methods ; Food industries ; Fundamental and applied biological sciences. 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The azo compounds produce a very sensitive polarographic wave at -0.70 V (versus the saturated calomel electrode). The height of the peak is linear with the concentration of nitrite in the range of 5 x 10(-9) to 5 x 10(-7) g/mL. The detection limit is 3 x 10(-9) g/mL. The electrochemical characteristics of the polarographic wave are also discussed. The method was used to determine nitrite in sausage. The results agree well with those obtained by spectrophotometry.</description><subject>Biological and medical sciences</subject><subject>Food Analysis - methods</subject><subject>Food industries</subject><subject>Fundamental and applied biological sciences. Psychology</subject><subject>General aspects</subject><subject>Meat and meat product industries</subject><subject>Methods of analysis, processing and quality control, regulation, standards</subject><subject>Nitrites - analysis</subject><subject>Polarography - methods</subject><issn>1060-3271</issn><issn>1944-7922</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2002</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNpFkDtPwzAUhS0EoqWwMqIssCX1I7HrBQmVp1SJBWbLdq-LqyQOdirUf09KIzGdO3z3HOlD6JrggmDJ5lsdtJ0vqoIWZcVP0JTIssyFpPR0uDHHOaOCTNBFSluMS8IxPUcTQqTEmNEpun-EHmLjW9370GbBZa3vo-8h823mQlinzOyz5NtNDXn6AeiyLtQ6hk3U3df-Ep05XSe4GnOGPp-fPpav-er95W35sMot46TPrZDgMDAiTGkElVqbYb-CxcI5kKSUBigj3MiKiLVggltptABbWlNCpSWbobtjbxfD9w5SrxqfLNS1biHskhKEV5ixA1gcQRtDShGc6qJvdNwrgtXBmPozphaVomowNjzcjM0708D6Hx8VDcDtCOhkde2ibq1P_xzjmEtasV-UwXTr</recordid><startdate>20020301</startdate><enddate>20020301</enddate><creator>Qiong, Li</creator><creator>Tong, Zhan</creator><creator>Yong, Luo</creator><creator>Dandan, Song</creator><creator>Guanghan, Lu</creator><general>AOAC International</general><scope>IQODW</scope><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7X8</scope></search><sort><creationdate>20020301</creationdate><title>Determination of nitrite in foods by single-sweep polarography</title><author>Qiong, Li ; Tong, Zhan ; Yong, Luo ; Dandan, Song ; Guanghan, Lu</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c361t-c79ef0e317b4b729aab9005e88ffe9149be2316b9517d7376c9ba7ec4cb4e5a93</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2002</creationdate><topic>Biological and medical sciences</topic><topic>Food Analysis - methods</topic><topic>Food industries</topic><topic>Fundamental and applied biological sciences. 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| ispartof | Journal of AOAC International, 2002-03, Vol.85 (2), p.456-459 |
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| language | eng |
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| source | MEDLINE; Oxford University Press Journals All Titles (1996-Current) |
| subjects | Biological and medical sciences Food Analysis - methods Food industries Fundamental and applied biological sciences. Psychology General aspects Meat and meat product industries Methods of analysis, processing and quality control, regulation, standards Nitrites - analysis Polarography - methods |
| title | Determination of nitrite in foods by single-sweep polarography |
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