| Item type |
デフォルトアイテムタイプ_（フル）(1) |
| 公開日 |
2023-03-18 |
| タイトル |
|
|
タイトル |
Use of potassium-form cation-exchange resin as a conductimetric enhancer in ion-exclusion chromatography of aliphatic carboxylic acids |
|
言語 |
en |
| 作成者 |
Iwata, Tomotaka
Mori, Masanobu
Itabashi, Hideyuki
Tanaka, Kazuhiko
|
| アクセス権 |
|
|
アクセス権 |
open access |
|
アクセス権URI |
http://purl.org/coar/access_right/c_abf2 |
| 権利情報 |
|
|
権利情報 |
Copyright (c) 2009 Elsevier B. V. |
| 主題 |
|
|
主題Scheme |
Other |
|
主題 |
Ion-exclusion chromatography |
| 主題 |
|
|
主題Scheme |
Other |
|
主題 |
Conductimetric enhancer |
| 主題 |
|
|
主題Scheme |
Other |
|
主題 |
Cation exchange |
| 主題 |
|
|
主題Scheme |
Other |
|
主題 |
Aliphatic carboxylic acids |
| 主題 |
|
|
主題Scheme |
NDC |
|
主題 |
430 |
| 内容記述 |
|
|
内容記述 |
In this study, a cation-exchange resin (CEX) of the W-form, i.e., an enhancer resin, is used as a postcolumn conductimetric enhancer in the ion-exclusion chromatography of aliphatic carboxylic acids. The enhancer resin is filled in the switching valve of an ion chromatograph; this valve is usually used as a suppressor valve in ion-exchange chromatography. An aliphatic carboxylic acid (e.g.,CH3COOH) separated by a weakly acidic CEX column of the H+-form converts into that of the K+-form (e.g., CH3COCK) by passing through the enhancer resin. In contrast, the background conductivity decreases because a strong acid (e.g., HNO3) with a higher conductimetric response in an eluent converts into a salt (e.g., KNO3 with a lower conductimetric response. Since the pH of the eluent containing the resin enhancer increases from 3.27 to 5.85, the enhancer accelerates the dissociations of analyte acids. Consequently, peak heights and peak areas of aliphatic carboxylic acids (e.g., acetic acid, propionic acid, butyric acid, and valeric acid) with the enhancer resin are 6.3-8.0 times higher and 7.2-9.2 times larger, respectively, than those without the enhancer resin. Calibrations of peak areas for injected analytes are linear in the concentration range of 0.01-1.0 mM.The detection limits (signal-to-noise ratio = 3) range from 0.10 mu M to 0.39 mu M in this system, as opposed to those in the range of 0.24-7.1 mu M in the separation column alone. The developed system is successfully applied to the determination of aliphatic carboxylic acids in a chicken droppings sample. |
|
言語 |
en |
| 出版者 |
|
|
出版者 |
Elsevier Science BV |
| 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 |
| 出版タイプ |
|
|
出版タイプ |
AO |
|
出版タイプResource |
http://purl.org/coar/version/c_b1a7d7d4d402bcce |
| 関連情報 |
|
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|
識別子タイプ |
DOI |
|
|
関連識別子 |
10.1016/j.talanta.2009.03.042 |
| 関連情報 |
|
|
|
識別子タイプ |
DOI |
|
|
関連識別子 |
http://dx.doi.org/10.1016/j.talanta.2009.03.042 |
| 収録物識別子 |
|
|
収録物識別子タイプ |
ISSN |
|
収録物識別子 |
0039-9140 |
| 収録物識別子 |
|
|
収録物識別子タイプ |
NCID |
|
収録物識別子 |
AA00856594 |
| 開始ページ |
|
|
開始ページ |
1026 |
| 書誌情報 |
Talanta
Talanta
巻 79,
号 4,
p. 1026-1030,
発行日 2009-09-15
|
| 旧ID |
28870 |
Talanta_79_1026.pdf (197.5 KB)
