Characterization of Soil Humic Substances Using Mid-infrared Photoacoustic Spectroscopy

作者: Changwen Du , Zhongqi He , Jianmin Zhou

DOI: 10.1007/978-94-007-5634-2_8

关键词: Photoacoustic spectroscopyInfraredHumic acidSpectral lineInfrared spectroscopyAbsorption (electromagnetic radiation)LeonarditeChemistryTransmittanceAnalytical chemistry

摘要: Fourier transform infrared photoacoustic spectra (FTIR-PAS) have been applied to characterize soil humic substances, i.e., acid (HA), mobile (MHA), and recalcitrant calcium humate (CaHA) from Leonardite soil. Conventional transmittance FTIR-PAS of these substances were collected. The significantly different the spectra. Totally, absorption bands in wavenumber range 2,000–3,800 cm−1 broader than that spectra, but 1,000–1,800 obviously narrow band height both aliphatic carboxyl groups was lower spectra; however, ratios two similar, ratio can be used show capability water repellence substances. All results indicated technique could provide a simple fast method for quantifying functional

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