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Influence of Nitrite on Chemical Oxygen Demand Determined by Potassium Permanganate at 100^oC and on Dissolved Oxygen Dtermination by Azide Modification
https://doi.org/10.34429/00001969
https://doi.org/10.34429/00001969f8e5abe8-97de-40f3-8d3a-4c6b39916dd0
| 名前 / ファイル | ライセンス | アクション |
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KJ00000157949.pdf (308.2 kB)
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| Item type | 紀要論文 / Departmental Bulletin Paper(1) | |||||||||||
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| 公開日 | 2009-03-13 | |||||||||||
| タイトル | ||||||||||||
| タイトル | Influence of Nitrite on Chemical Oxygen Demand Determined by Potassium Permanganate at 100^oC and on Dissolved Oxygen Dtermination by Azide Modification | |||||||||||
| 言語 | en | |||||||||||
| 言語 | ||||||||||||
| 言語 | eng | |||||||||||
| 資源タイプ | ||||||||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||||||||
| 資源タイプ | departmental bulletin paper | |||||||||||
| ID登録 | ||||||||||||
| ID登録 | 10.34429/00001969 | |||||||||||
| ID登録タイプ | JaLC | |||||||||||
| タイトル(別表記) | ||||||||||||
| 言語 | en | |||||||||||
| 著者名 |
平山, けい子
× 平山, けい子
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| 内容 | ||||||||||||
| 内容記述タイプ | Other | |||||||||||
| 内容記述 | A marked elevation in COD of the water treated by activated sludge was observed, which suggested the existence of nitrite-N in high concentration. In such a case, it was impossible to determine DO concentration with normal addition of alkali-iodide-azide reagent. In order to find an alternative method which could avoid this difficulty, the effect of nitrite on COD value determined by potassium permanganate at 100℃ and on dissolved oxygen determination by azide modification was investigated. Chemical oxygen demand of 1mg/l nitrite-N solution was 1.1mg/l that was equal to theoretical oxygen demand for oxidation of nitrite-N to nitrate-N. The above fact suggests that the increase of COD at the presence of nitrite-N has to be taken into consideration in determining COD. With an addition of only 1mι of alkali-iodide-azide reagent, the part exceeding over 2.15mg of nitrite-N (about 15 to 20mg/l nitrite-N) were found still liberating iodine continuously and preventing analysis of DO value. It is then found necessary to analyze concentration of nitrite-N before DO determination and to add adequate amount of alkali-iodide-azide reagent, if samples contain more than 15 to 20mg/l nitrite-N. | |||||||||||
| 言語 | en | |||||||||||
| 出版者 | ||||||||||||
| 出版者 | 山梨大学工学部 | |||||||||||
| 言語 | ja | |||||||||||
| ISSN | ||||||||||||
| 収録物識別子タイプ | PISSN | |||||||||||
| 収録物識別子 | 0513-1871 | |||||||||||
| NCID | ||||||||||||
| 収録物識別子タイプ | NCID | |||||||||||
| 収録物識別子 | AN0024491X | |||||||||||
| 書誌情報 |
ja : 山梨大學工學部研究報告 en : Reports of the Faculty of Engineering, Yamanashi University 巻 29, p. 112-115, 発行日 1978 |
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| 著者版フラグ | ||||||||||||
| 出版タイプ | VoR | |||||||||||
| 出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 | |||||||||||
