五常大米中红外光谱研究  

Study on mid-infrared spectrum of Wuchang rice

作　　者：杜林楠 郭丽霄 夏玉凤[3] 赵宇亮 杜建会 王晓萱 吴梦谣 鹿永鑫 Du Linnan;Guo Lixiao;Xia Yufeng;Zhao Yuliang;Du Jianhui;Wang Xiaoxuan;Wu Mengyao;Lu Yongxin(School of Chemical Engineering,Shijiazhuang University,Shijiazhuang 050035,China;Hebei ZhongYuan Construction Project Management Corporation Ltd.,Shijiazhuang 050000,China;Hebei Normal University,Shijiazhuang 050000,China;The Second Hospital,Hebei Medical University,Shijiazhuang 050000,China;Shijiazhuang Science and Technology Career Academy,Shijiazhuang 050000,China)

机构地区：[1]石家庄学院化工学院,河北石家庄050035 [2]河北中原工程项目管理有限公司,河北石家庄050000 [3]河北师范大学,河北石家庄050000 [4]河北医科大学第二医院,河北石家庄050000 [5]石家庄科技职业学院,河北石家庄050000

出　　处：《煤炭与化工》2021年第2期146-150,160,共6页Coal and Chemical Industry

基　　金：石家庄市科学技术研究与发展计划(201490612)。

摘　　要：采用中红外光谱(MIR光谱)开展了五常大米的结构研究,实验发现:五常大米的红外吸收模式主要包括νOH-五常大米、νas CH_(2)-五常大米、ν酰胺-Ⅰ-五常大米、ν酰胺-Ⅱ-五常大米和νC-O-五常大米。进一步开展了五常大米变温中红外(TD-MIR)光谱研究,实验发现:随着测定温度的升高(303~393 K),五常大米主要官能团对应的吸收频率和强度均有一定的改变,而五常大米的热稳定性进一步降低。本项研究拓展了MIR光谱及TD-MIR光谱技术在重要农产品(五常大米)结构及热稳定性的研究范围。The structure of Wuchang rice was studied by mid-infrared spectrum(MIR).The results show that the infrared absorption modes of Wuchang rice mainly includedνOH-Wuchang rice,νas CH_(2)-Wuchang rice,νamide-Ⅰ-Wuchang rice,νamide-Ⅱ-Wuchang riceandνC-O-Wuchang rice.The Temperature-dependent mid-infrared(TD-MIR)spectra of Wuchang rice were further studied,it is found that with the increase of temperature(303~393 K),the absorption frequency and intensity of the main functional groups of Wuchang rice were changed to some extent,however,the thermal stability of Wuchang rice was further reduced.This study extended the research scope of MIR spectrum and TD-MIR spectrum in the structure and thermal stability of important agricultural products(Wuchang rice).

关 键 词：五常大米 红外光谱 变温红外光谱 

分 类 号：O657.33[理学—分析化学]