近红外拓扑方法在南疆红枣品质分析中的应用

从南疆红枣的物理和光谱特征两方面,通过反复调整和逐步细分相结合的方法,给出红枣品质细分和特征因子分析框图。实际应用中可依据不同需要设置最佳光谱参数来提高光谱重复性和质量。实验分离出南疆红枣常见的裂口褐变、色泽和成分等光谱特征因子,如褐变特征因子明显尖峰特征谱线位置10 170cm-1。通过光谱图的特征分析,初步建立了红枣近红外光谱和部分品质之间的对应关系,为下一步红枣品质编码奠定了基础。该方法可节省大量重复建模费用,在建立红枣近红外品质分析标准和模型库共享方面有较好的应用前景。

Application of near-infrared topology method in the quality analysis of jujube of southern Xinjiang

In the present paper, both the physical characteristics and spectral signatures of southern Xinjiang jujube were studied. With the methods of repetitive adjustment and stepwise refinement, the analysis diagram of jujube quality subdivision and characteristic factors were obtained. In actual practice, the spectra repeatability and quality can be improved by setting an optimum acquisition parameter according to different experimental requirements. Through experiments the characteristic factors of crack browning, luster and compositions were obtained, which demonstrates a distinguishing downing characteristic spectral line at the wave number of 10 170 cm(-1). Through characteristic analysis of jujube NIR spectra, the correspondence between the jujube spectra and their qualities was established, which lays the foundation for jujube qualities' characteristic coding in the future. The application of near-infrared topology method in the quality analysis of southern Xinjiang jujube is cost saving, which has a broad application prospect in establishing the NIR analytical standard and model database sharing of the jujube's quality in the future.