分析测试学报2011，Vol.30Issue(5)：588-592,5.DOI:10.3969/j.issn.1004-4957.2011.05.023
消除水汽吸收峰干扰的红外光谱测量方法
Methods of Elimination of Water Vapor Bands from an Infrared Spectrum
摘要
Abstract
Water vapor absorption bands may severely obscure important sample features in the infrared spectrum. In order to solve this problem, many methods, such as, vacuum, dry air purging technique, sample shuttle technique and spectral subtraction, etc, have been proposed and conducted. In this article, humidity titration method to remove water vapor noise completely was emphatically reviewed. The scanning procedure of a sample single beam spectrum was divided into two stages. At the first stage, the appearance of water vapor peaks was allowed and the absorption direction (for example absorbance A ≥0 or A ≤0) of water vapor bands was observed easily at the end of this stage. Then, the relative humidity in the sample compartment of spectrometer was changed by a dry or a wet air supply depending on the absorption direction of water vapor bands. After the relative humidity was changed to a certain extent, water vapor peaks would become smaller and smaller with the increase in scanning number during the second stage. By this way, water vapor noise could be eliminated progressively and completely at last.关键词
红外光谱/水汽噪音/湿度滴定/综述Key words
infrared spectroscopy/ water vapor noise/ humidity titration/ review分类
化学化工引用本文复制引用
许琳,王海水..消除水汽吸收峰干扰的红外光谱测量方法[J].分析测试学报,2011,30(5):588-592,5.基金项目
国家自然科学基金资助项目(20873136) （20873136）
