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Selective Peak Enhancement and Suppression in Conductometric Ion Chromatography and Its Application to the Determination of Trace Levels of Orthophosphate in Environmental Samples
http://hdl.handle.net/2297/44558
http://hdl.handle.net/2297/4455833e06420-460a-4835-a704-577768d53090
| 名前 / ファイル | ライセンス | アクション |
|---|---|---|
PH-PR-HAYAKAWA-K-25.pdf (300.0 kB)
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| Item type | 学術雑誌論文 / Journal Article(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2017-10-04 | |||||
| タイトル | ||||||
| タイトル | Selective Peak Enhancement and Suppression in Conductometric Ion Chromatography and Its Application to the Determination of Trace Levels of Orthophosphate in Environmental Samples | |||||
| 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 | journal article | |||||
| 著者 |
Hayakawa, Kazuichi
× Hayakawa, Kazuichi× Kato, Akio× Yamamoto, Atsushi× Miyazaki, Motoichi |
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| 書誌情報 |
Analytical Sciences 巻 8, 号 1, p. 25-29, 発行日 1992-01-01 |
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| ISSN | ||||||
| 収録物識別子タイプ | ISSN | |||||
| 収録物識別子 | 0910-6340 | |||||
| NCID | ||||||
| 収録物識別子タイプ | NCID | |||||
| 収録物識別子 | AA10500785 | |||||
| DOI | ||||||
| 関連タイプ | isIdenticalTo | |||||
| 識別子タイプ | DOI | |||||
| 関連識別子 | 10.2116/analsci.8.25 | |||||
| 出版者 | ||||||
| 出版者 | 日本分析化学会 = The Japan Society for Analytical Chemistry | |||||
| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | In non-suppressed conductometric ion chromatography, when a carboxylic acid eluent of low pH is used, the signal intensity (ΔHc) is proportional to the sum of the conductivity change caused by changes in the sample concentration (ΔCs) as well as conductivity changes caused by changes in the eluent concentration (ΔCe). This can be expressed as ΔHC=B(ΔCs)+B(ΔCe), where B is a constant. In this equation, ΔCs is constant for any sample species. However, ΔCe varies with changes in the sample capacity factors. This value is positive when the sample elutes before the system peak (k′s<k′e), and is negative when it elutes after the system peak (k′s>k′e). Therefore, the sample peak intensity (ΔHC) is enhanced prior to the system peak and is suppressed after it. These effects increase the closer the sample and the system peaks. The effect of this theory was proved by a determination of orthophosphate using a TSK gel IC-Anion-PW column and a 0.75mM phthalic acid eluent. The detection limit of this method for orthophosphate (1×10-11mol, with an S/N of three) was smaller (by a factor of 10-30) than those by previous conventional ion chromatographic methods. Also, the interference of chloride or nitrate, often observed in the previous methods, was removed by suppressing their peak intensities. When this method was applied for the determination of orthophosphate in environmental samples, other interfering compounds were effectively removed by a column-switching system attached to the ion chromatograph, and a trace level of the orthophosphate was determined. | |||||
| 権利 | ||||||
| 権利情報 | Copyright © The Japan Society for Analytical Chemistry | |||||
| 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 | |||||
| 関連URI | ||||||
| 識別子タイプ | URI | |||||
| 関連識別子 | https://www.jstage.jst.go.jp/browse/analsci | |||||
| 関連URI | ||||||
| 識別子タイプ | URI | |||||
| 関連識別子 | http://www.jsac.jp/ | |||||
