CAJ | 학술논문

土壤颗粒在微观尺度上具有明显的异质性,表现为土壤有机质与矿物质的双层复合物结构。本研究以人工制备的复合膜样本为材料,采用红外光声光谱技术和独立成分分析对复合膜样本层进行原位剖面分析。复合膜样本由PE保鲜膜和办公胶带制备,红外光声光谱仪动静速率分别为0.16,0.32和0.64 cm/s。结果表明,通过改变光谱仪动静速率可以原位获取复合膜样本不同深度的组成信息,并估测出PE膜的厚度为5.4~7.6μm,与实际厚度(7±1)μm相接近；同时利用独立成分分析可以直接从复合膜样品的红外光声光谱中,同时分离出PE保鲜膜和胶带的光声光谱特征。红外光声光谱技术可对复合膜进行剖面分析,为进一步研究异质性土壤样本,特别是有机矿质复合体样本提供了新的分析手段。
토양과립재미관척도상구유명현적이질성,표현위토양유궤질여광물질적쌍층복합물결구。본연구이인공제비적복합막양본위재료,채용홍외광성광보기술화독립성분분석대복합막양본층진행원위부면분석。복합막양본유PE보선막화판공효대제비,홍외광성광보의동정속솔분별위0.16,0.32화0.64 cm/s。결과표명,통과개변광보의동정속솔가이원위획취복합막양본불동심도적조성신식,병고측출PE막적후도위5.4~7.6μm,여실제후도(7±1)μm상접근；동시이용독립성분분석가이직접종복합막양품적홍외광성광보중,동시분리출PE보선막화효대적광성광보특정。홍외광성광보기술가대복합막진행부면분석,위진일보연구이질성토양양본,특별시유궤광질복합체양본제공료신적분석수단。
Soil particles are very heterogeneous in microscopic scale, which is manifested the double-layer structure made of the soil organic matter and mineral matter. In this work, Fourier by transform infrared photoacoustic spectroscopy ( FTIR-PAS) combined with independent component analysis ( ICA) was utilized for in situ depth-profiling of the manmade complex film, in order to lay a foundation of in situ characterizing the heterogeneous soil organic-mineral complex. The complex film was composed of the PE preservative film and office adhesive tape. The moving velocity of infrared photoacoustic spectrometer was set to 0. 16 cm/s, 0. 32 cm/s and 0. 64 cm/s, respectively. Independent component analysis ( ICA ) was performed on the photoacoustic spectra of the heterogeneous complex film. Results showed that the depth-resolved information of the complex film could be derived by changing the moving velocity, and the estimated thickness of PE film was 5. 4-7. 6 μm, which was close to the actual thickness 7 ± 1 μm. Moverover, the spectral features of the polyethylene ( PE) preservative film and office adhesive tape were extracted from the photoacoustic spectra of the heterogeneous complex film by means of ICA. Depth profiling of complex film samples showed that FTIR-PAS could be used as a new analytical tool to study heterogeneous soils, especially soil organic-mineral complexes.