【引用本文】 邵惠萍, 严雪俊, 严俊, 等. 应用傅里叶变换红外光谱与紫外可见吸收光谱鉴别两类海水养殖灰色珍珠[J]. 岩矿测试, 2019, 38(5): 489-496. doi: 10.15898/j.cnki.11-2131/td.201809280109
SHAO Hui-ping , YAN Xue-jun , YAN Jun , et al. Identification of Two Kinds of Seawater Cultured Gray Pearls by Fourier Transform Infrared Spectroscopy and Ultraviolet-visible Absorption Spectroscopy[J]. Rock and Mineral Analysis, 2019, 38(5): 489-496. doi: 10.15898/j.cnki.11-2131/td.201809280109

应用傅里叶变换红外光谱与紫外可见吸收光谱鉴别两类海水养殖灰色珍珠

1. 浙江方圆检测集团股份有限公司, 浙江 杭州 310013;

2. 浙江工业大学分析测试中心, 浙江 杭州 310014;

3. 浙江工业大学温州科学技术研究院, 浙江 温州 325024

收稿日期: 2018-09-28  修回日期: 2019-03-14 

基金项目: 浙江省公益技术应用研究(2017C37001);浙江省质监系统公益科研项目(20170206)

作者简介: 邵惠萍,工程师,主要从事宝玉石检测科研工作。E-mail:609542506@qq.com。。

Identification of Two Kinds of Seawater Cultured Gray Pearls by Fourier Transform Infrared Spectroscopy and Ultraviolet-visible Absorption Spectroscopy

1. Zhejiang Fangyuan Test Group Co., LTD, Hangzhou 310013, China;

2. Research Center of Analysis and Measurement, Zhejiang University of Technology, Hangzhou 310014, China;

3. Wenzhou Institute of Science and Technology, Zhejiang University of Technology, Wenzhou 325024, China

Received Date: 2018-09-28
Revised Date: 2019-03-14

摘要:Akoya珍珠属生物矿化有机宝玉石,该类珍珠的矿物组成与微结构分析、定性与其颜色形成属性的鉴定方法尚为缺乏。本文通过光学显微镜、紫外可见吸收光谱、傅里叶变换红外光谱、能量色散X射线荧光光谱对具有白色或灰色珠核的两类Akoya灰色珍珠的珍珠层与珠核的结构特征及显色机制、紫外吸收光谱、微量金属元素赋存特征进行了对比研究。结果表明:①灰色珍珠的珠核有白色与灰色两类,两类珍珠的直径主要分布在5~9mm,珍珠层厚度约300~500μm;②两类珍珠的珍珠层和珠核的主体矿物组成均为生物文石,且两者的珍珠层中均富Sr贫Mn。③灰色的珠核具有明显的富Mn特征,且由于辐照使得Mn元素的价态升高并使得珠核致灰色,并导致整个珍珠呈现灰色;④紫外可见吸收光谱检测中,一般而言具有白色珠核的灰色珍珠在300~400nm波段可见明显的反射带,而具有灰色珠核的灰色珍珠在400~500nm波段可见明显的反射带。两类灰色珍珠皆为海水养殖珍珠,两类珍珠的紫外吸收光谱的差异可作为初步评判灰色系珍珠是否经辐照改色的依据之一。

关键词: 灰色珍珠, 紫外可见吸收光谱, 结构, 珍珠层, 珠核, 辐照处理

Identification of Two Kinds of Seawater Cultured Gray Pearls by Fourier Transform Infrared Spectroscopy and Ultraviolet-visible Absorption Spectroscopy

KEY WORDS: gray pearl, ultraviolet-visible absorption spectroscopy, structure, nacreous layer, nucleus, irradiation treatment

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应用傅里叶变换红外光谱与紫外可见吸收光谱鉴别两类海水养殖灰色珍珠

邵惠萍, 严雪俊, 严俊, 王金, 余思逸, 彭秋瑾, 胡仙超