How to Remove Water Absorption Bands Completely from IR Spectra of Aqueous Solution
BAI Sha-sha1, WANG Huan2, CHEN Yu-jing1*, WANG Hai-shui1*
1. School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, China 2. College of Chemistry，Sichuan University，Chengdu 610064, China
Abstract：Infrared spectral studies of aqueous solution have been severely limited by the strong water absorption. Usually，it is very difficult to experimentally achieve perfect compensation between the amount of water that contributes to the sample and background spectra. In the present paper, we introduced a new method to make the infrared bands of water disappear during the measurement of an infrared spectrum for aqueous solution. Both background spectrum of the empty ATR cell and that of the water on ATR cell are used in sequence. Qualified infrared spectra of 10% K2CO3 and 10% BSA aqueous solutions were successfully obtained by ATR accessory (single-reflection) without water interference. The experimental results demonstrated that the new method is fast, effective and powerful. The limitation of the new method is also discussed.
Key words：Infrared spectra;Aqueous solution;ATR;Elimination water bands
白沙沙1，王 欢2，陈玉静1*，王海水1* . 消除溶剂水吸收峰干扰的红外光谱测量新方法 [J]. 光谱学与光谱分析, 2015, 35(04): 894-898.
BAI Sha-sha1, WANG Huan2, CHEN Yu-jing1*, WANG Hai-shui1* . How to Remove Water Absorption Bands Completely from IR Spectra of Aqueous Solution . SPECTROSCOPY AND SPECTRAL ANALYSIS, 2015, 35(04): 894-898.
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