Jing Le, Liu Yuhan, Cui Jiaqi, Ma Jinghan, Yuan Dongdong, Wang Chengtao
Beijing Engineering and Technology Research Center of Food Additives, School of Food and Health, Beijing Technology & Business University, Beijing 100048, China.
Foods. 2024 Aug 20;13(16):2607. doi: 10.3390/foods13162607.
In this study, indigo carmine (IC)-calcium carbonate lakes with different crystalline forms of calcium carbonate were prepared through co-precipitation methods, and the properties of these lakes and their formation mechanisms were investigated. The results showed that amorphous calcium carbonate (ACC) exhibited the smallest particle size and the largest specific surface area, resulting in the highest adsorption efficiency. Vaterite, calcite, and aragonite followed after ACC in decreasing order of adsorption efficiency. Kinetic analysis and isothermal analysis revealed the occurrence of chemisorption and multilayer adsorption during formation of the lakes. The FTIR and Raman spectra suggested participation of sulfonic acid groups in chemisorption. Appearance of IC significantly altered TGA curves by changing weight loss rate before decomposition of calcium carbonate. EDS analysis revealed the adsorption of IC predominantly happened on the surface of calcium carbonate particles rather than the interior.
在本研究中，通过共沉淀法制备了具有不同晶型碳酸钙的靛蓝胭脂红（IC）-碳酸钙色淀，并研究了这些色淀的性质及其形成机制。结果表明，无定形碳酸钙（ACC）的粒径最小，比表面积最大，吸附效率最高。球霰石、方解石和文石的吸附效率依次低于ACC。动力学分析和等温线分析表明，在色淀形成过程中发生了化学吸附和多层吸附。傅里叶变换红外光谱（FTIR）和拉曼光谱表明磺酸基团参与了化学吸附。IC的出现通过改变碳酸钙分解前的失重率显著改变了热重分析（TGA）曲线。能谱分析（EDS）表明，IC的吸附主要发生在碳酸钙颗粒表面而非内部。
