土壤水分
傅里叶变换红外光谱
土工试验
有机质
化学
环境化学
样品(材料)
样品制备
土壤科学
分析化学(期刊)
环境科学
色谱法
化学工程
有机化学
工程类
作者
R. A. Cox,H.L Peterson,Julie K. Young,C Cusik,Edgard O. Espinoza
标识
DOI:10.1016/s0379-0738(99)00203-0
摘要
In order to elucidate the discriminating power of various soil analytical techniques, over 100 soils samples were analyzed using conventional analysis (i.e., color, percent organic and density gradient) and a novel FTIR technique. The FTIR technique involves collecting a spectrum of a soil sample that has been oxidatively pyrolysed, and therefore all organic have been degraded. This spectrum is subtracted from the spectrum of the same sample that contained the organic prior to pyrolysis. This resultant IR spectrum represents the organic portion of the sample. The use of organic components increases the discrimination in soils that are otherwise similar. We have illustrated the usefulness of this technique by selecting four soil samples, which have identical Munsel color values but can be discriminated by subtractive ETIR. We propose that the ETIR spectra of the organic portion of soil serves a useful purpose in forensic investigations.
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