近红外光谱技术快速鉴别查哈阳大米

Rapid Identification of Chahayang Rice Using Near Infrared Spectroscopy

查哈阳大米为黑龙江特色品牌大米,为保护查哈阳大米品牌,实现查哈阳大米原产地快速真伪鉴别。通过构建不同地域和品种水稻试验田,收获期内对试验田大米的近红外光谱进行全波长扫描,筛选与产地相关特征波段。在特征波段处对来自查哈阳地区及非查哈阳地区的233份大米进行定性分析及定量分析。结果表明,与产地因素主要相关的波长为5 136~5 501 cm^(-1),利用此波段采用因子化法建立定性分析模型对查哈阳大米正确鉴别率为100%,采用偏最小二乘法建立的定量分析模型对查哈阳大米正确判别率为95.83%。

Chahayang rice is a special brand of rice produced in Heilongjiang.In order to protect this brand,there is a need to establish a method for the rapid identification of Chahayang rice.In this paper,near infrared spectra of rice from a test paddy field were scanned in the full wavenumber range,and the characteristic bands for Chahayang rice were screened.Qualitative and quantitative analysis of233rice samples from Chahayang and other areas at the characteristic band were performed and compared.The results showed that the main factors associated with the geographical origin of Chahayang rice exhibited absorption bands in the wavenumber range of5136-5501cm-1.The rate of correct identification of Chahayang rice with the qualitative analysis model established based on the main factors was100%,while that with the model developed through partial least squares(PLS)regression was95.83%.