A flexible method of carbonate determination using an automatic gas analyzer equipped with an FTIR photoacoustic measurement chamber
文献类型：期刊论文
| 作者 | Liu, WX; Sun, ZX; Ranheimer, M; Forsling, W; Tang, HX |
| 刊名 | ANALYST
 |
| 出版日期 | 1999 |
| 卷号 | 124期号:3页码:361-365 |
| 英文摘要 | A Fourier transform infrared spectrometer was employed to determine automatically the total inorganic carbonate (nc) in solids and waters, based on active photoacoustic absorption of infrared light by carbon dioxide. A 2.0 l reactor, connected to the spectrometer, is immersed in water-bath at 20 degrees C, After purging with pure N-2, 5 mi of 0.5 mol l(-1) HClO4 are injected into 50 mi of solid suspension or solution with continuous stirring. The specific absorption of infrared light by the CO2 evolved induces corresponding fluctuations of temperature and pressure in a measurement chamber. Accordingly, photoacoustic signals, with frequencies dependent on the absorbed wavelengths, are generated and measured by the chamber microphones in the form of an absorption spectrum and concentration. For solids, the method exhibits a linear response up to 120 mp of CaCO3 with a detection limit of 0.02 mg; in the case of waters, these figures of merit are 36.4 mmol l(-1) and 3 mu mol l(-1) NaHCO3, respectively. Since proton consumption by TIC in clay minerals may commonly influence the evaluation of surface acid-base properties, the methodology was applied to determine TIC in three natural illite samples of different origins. In addition, some potential interferences and modifications of this method are discussed. |
| 研究领域[WOS] | Chemistry |
| WOS记录号 | WOS:000079232300024 |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/24228]  |
| 专题 | 生态环境研究中心_环境化学与生态毒理学国家重点实验室 |
| 推荐引用方式 GB/T 7714 | Liu, WX,Sun, ZX,Ranheimer, M,et al. A flexible method of carbonate determination using an automatic gas analyzer equipped with an FTIR photoacoustic measurement chamber[J]. ANALYST,1999,124(3):361-365. |
| APA | Liu, WX,Sun, ZX,Ranheimer, M,Forsling, W,&Tang, HX.(1999).A flexible method of carbonate determination using an automatic gas analyzer equipped with an FTIR photoacoustic measurement chamber.ANALYST,124(3),361-365. |
| MLA | Liu, WX,et al."A flexible method of carbonate determination using an automatic gas analyzer equipped with an FTIR photoacoustic measurement chamber".ANALYST 124.3(1999):361-365. |
入库方式： OAI收割
来源：生态环境研究中心
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