The biochemical composition and structureal characteristic of fresh water pipless pearl were determined using, two methods: Infrared Spectroscopy ( IR) and Circular Dichromism spectra ( CD). 为探讨淡水无核珍珠的细微生化组分和结构特征,建立有效鉴定方法,试验运用红外吸收光谱(IR)与园二色谱法(CD)等波谱方法对其进行分析检测。