基于色差计技术区分不同原藻产地干紫菜(条斑紫菜)

针对近年来我国条斑紫菜(Pyropia yezoensis)栽培区北移、产区扩大、紫菜交易市场出现不同原藻产地干紫菜混杂的现象,迫切需要对不同原藻产地的干紫菜进行鉴别。本文采用色差计技术结合多元变量分析,对62份产于江苏南部海区和山东威海海区的原藻干紫菜样品光谱反射率与颜色进行测定和分析。结果表明:江苏南部产区的干紫菜样品的L*、a*、b*值均高于威海样品,且在a*、b*值上存在显著性差异,即威海产区的干紫菜相较于江苏南部产区的干紫菜颜色更显蓝绿色。江苏南部产区样品的光谱反射率在500—740nm波长下均大于威海海区的样品,700—740nm的反射波长为2个原藻产区干紫菜的特征差异波长。色差技术结合多元变量分析可以区分不同产地干紫菜。

Distinguish the Dried Laver (Pyropia yezoensis) from Different Origins of Algae by Colorimeter Technology

In recent years, the cultivation area of Pyropia yezoensis in China has moved northwards, the production area has expanded, and a mixture of the dried laver from different origins is dealt in the laver trading market. In response to these phenomena, there is an urgent need to identify dried laver from different origins. Colorimeter technology coupled with multivariate analysis is used to determine and analyze the spectral reflectance and color of 62 dried laver samples from the southern coast of Jiangsu Province and Weihai coast, Shandong Province. The results show that the L^*, a^*, and b^* values of dried laver samples in Jiangsu southern production area are higher than those in Weihai, and there are significant differences in a^* and b^* values, that is, the dried laver in Weihai production area is more bluish green than that in the southern production area of Jiangsu. The spectral reflectance of the samples in Jiangsu southern production area is larger than that in Weihai coast at the wavelength of 480-740 nm. The reflection wavelength of 700-740 nm is the characteristic difference wavelength of dried laver in the two production areas. The dried laver from different origins can be distinguished by the colorimeter technology coupled with multivariate analysis.