傅里叶变换红外光谱法对珍珠粉和贝壳粉的研究  

Study on the Differentiation of Pearl and Conch Powders by FTIR

作　　者：夏静芬[1] 钱国英[1] 陈亮[1] 李彩燕[1] 

机构地区：[1]浙江万里学院生物与环境学院,浙江省宁波市钱湖南路8号315100

出　　处：《光谱实验室》2010年第2期524-528,共5页Chinese Journal of Spectroscopy Laboratory

基　　金：浙江省科技项目(计划编号:2006C22030);浙江省分析测试科技计划项目(计划编号:2009F70064)

摘　　要：通过FTIR比较研究了淡水养殖珍珠的珍珠粉和贝壳粉样品原样、角壳蛋白以及250、400℃和750℃热处理2h后红外光谱的差异。结果表明,珍珠粉和贝壳粉的主要成分均为文石型碳酸钙,并含有少量有机质和水分。2种粉末角壳蛋白红外吸收峰型基本相似,仅在2113.3cm-1处存在差异。250℃加热后,两者成分结构基本没有变化;400℃加热后2种粉末有机物完全分解,珍珠粉文石碳酸钙的晶型部分转变为方解石型,而贝壳粉碳酸钙已完全转化为方解石型;750℃加热后两者的碳酸钙晶形均已完全转化为方解石型,且有大量碳酸钙分解为氧化钙。Infrared spectra of raw pearl and conch powders,protein macromolecules,and samples after being heated at 250,400℃ and 750℃ were analyzed by Flourier transformation infrared spectroscopy. The results indicated that the pearl and conch powders were all consisted of the major aragonite and a slight amount of organisms and some water. The infrared spectra of these two protein macromolecules were very similar,except for the peak variation at 2113. 3cm^-1. The composition and structure of these samples did not change after thermal treatment at 250℃. However , after treatment at 400℃, the aragonite crystal began to change to calcite form pearl powder samples. For conch powder sample, the aragonite crystals were almost totally changed to calcite form. In addition, after treatment at 750℃, all the samples were decomposed and changed to calcite form. Many of the calcium carbonate were degraded to calcium oxide.

关 键 词：珍珠粉 贝壳粉 傅里叶变换红外光谱 

分 类 号：O657.33[理学—分析化学]