论文部分内容阅读
介绍了近红外和拉曼光谱测定法的不同及其在预测木材和纸浆性能上的应用。研究了采样技术和NIR光谱质量的关系及性能预测的精确度。对用不同的采样技术得到的木质原料,用NIRS预测了不同木材的制浆潜力。结果表明,水分的测定,可以以木片或锯木链上的锯末为试样,但化学成分的测定,则最好以40目或60目筛选的锯末为试样。在测定木材的主要化学成分(木素、抽提物、纤维素、半纤维素及聚糖含量)时需要进行校准。对于抽提物,光谱所获得的结果是在未抽提的样品上进行的,但其他组分的测定,必须对样品进行抽提。最后,比较了NIRS与拉曼光谱测定法对木材化学组分的测定结果。
The differences between NIR and Raman spectrometry and their applications in predicting wood and pulp properties are described. The relationship between the sampling technique and NIR spectral quality and the accuracy of performance prediction are studied. NIRS was used to predict the pulping potential of different wood for wood raw materials obtained with different sampling techniques. The results showed that the determination of moisture could be sawdust on sawdust or sawdust wood as a sample, but the determination of chemical composition, the best 40 mesh or 60 mesh sieve sawdust as a sample. Calibration is required when determining the main chemical components of wood (lignin, extractives, cellulose, hemicellulose and glycans). For the extract, the result of the spectrum is taken on the sample that has not been extracted, but for the determination of other components, the sample must be extracted. Finally, the results of the determination of the chemical composition of wood by NIRS and Raman spectroscopy were compared.