【摘要】 利用傅里叶变换红外光谱（FTIR）和二维相关红外光谱（2D-IR）对云南保山四种不同海拔的小粒咖啡进行分析，结果显示咖啡的主要由为脂质、蛋白质、多糖和咖啡因的峰组成。不同海拔咖啡样品的FTIR光谱在整体上无明显差异，二维相关红外光谱在2 800～3 800 cm^-1范围内自动峰的数量和强度存在明显差异，高海拔咖啡自动峰数量比低海拔咖啡的要多。研究表明傅里叶变换红外光谱结合二维相关红外光谱能够快速、有效地鉴别不同海拔小粒咖啡。更多还原

【Abstract】 Fourier Transform infrared spectroscopy（FTIR） and two-dimensional correlation infrared spectroscopy（2D-IR） were used to study four kinds of coffees at different altitudes in Baoshan, Yunnan province. The results show that the main components of coffee were lipid, protein, sugar and caffeine. There was no significant difference in the original FTIR spectra of the four coffee samples at different altitudes as a whole, but there were significant differences in the number and intensity of auto peaks in the range of 2 800～3 800 cm^-1 in 2D-IR spectra. The number of auto peaks in high altitude coffee was more than that in low altitude coffee. The results show that FTIR spectroscopy combined with 2D-IR spectroscopy can quickly and effectively identify coffee arabica at different altitudes.更多还原