胡敏酸衰减全反射-傅里叶变换-红外光谱研究
Attenuated Total Reflectance-Fourier Transform Infrared-Spectroscopic Study on Humic Acids in Soil
查看参考文献20篇
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文摘
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胡敏酸是土壤有机质的重要组成部分。胡敏酸的物化结构和特性直接影响其环境地球化学行为,因此,也是胡敏酸地球化学研究的重要内容。傅里叶变换-红外光谱是胡敏酸物化结构和性质研究的强大工具,以往的研究通常采用压片-透射吸收法来研究分析胡敏酸的有机官能团信息。本工作采用透射-傅里叶变换-红外光谱和衰减全反射-傅里叶变换-红外光谱两种分析方法对比研究了黄壤和石灰土中胡敏酸的有机官能团信息。结果表明,两种分析方法给出完全一致的研究结果,即:黄壤胡敏酸脂肪碳含量较高,芳香结构含量较低;石灰土胡敏酸分子的脂肪碳含量较低,芳香结构和含氧官能团含量较高。比较而言,衰减全反射-傅里叶变换-红外光谱操作简便,无需对待测胡敏酸样品进行预处理,可以广泛地应用于胡敏酸红外光谱的分析。 |
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其他语种文摘
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Humic acids(HAs)are important constituents of soil organic matter,whose physicochemical properties and molecular structures are important to their environmental geochemical behaviors.Fourier-Transform Infrared Spectroscopy is one powerful tool for characterizing organic functional groups of humic acids,with a classic method of pressing pellets-transmission mode.This study employed and compared two different Fourier Transform Infrared Spectroscopy methods,Transmission-Fourier Transform Infrared Spectroscopy(T-FTIR)and Attenuated Total Reflectance-Fourier Transform Infrared Spectroscopy(ATR-FTIR),to characterize humic acids extracted from two natural soils,yellow earth and limestone soil.The results obtained from the two methods are identical,that is,humic acids extracted from yellow earth,have high contents of aliphatic carbons and low contents of aromatic compositions,whereas,humic acids extracted from the limestone soil contain low contents of aliphatic carbons and high contents of aromatic compositions.Since the operation procedures of Attenuated Total Reflectance-Fourier Transform Infrared Spectroscopy are much easier,for example,pellet pressing is not required,it is believed that Attenuated Total Reflectance-Fourier Transform Infrared Spectroscopy is a promising experimental method to characterize natural organic matter. |
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来源
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地球与环境
,2014,42(1):55-61 【核心库】
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关键词
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胡敏酸
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衰减全反射
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傅里叶变换红外光谱
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自然土壤
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地址
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中国科学院地球化学研究所, 环境地球化学国家重点实验室, 贵阳, 550002
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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1672-9250 |
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学科
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农业基础科学 |
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基金
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中国科学院“百人计划”项目
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国家自然科学基金资助项目
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贵州科技计划项目
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文献收藏号
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CSCD:5040946
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