微量元素含量测定在珍珠鉴定中的应用  

Application of trace element content analysis in identification of pearl

作　　者：王怡梦[1] 陈婵[1] 陈能香 张余 徐志[1] WANG Yimeng;CHEN Chan;CHEN Nengxiang;ZHANG Yu;XU Zhi(Guangdong Gemstones&Precious Metals Testing Center,Guangzhou 510080,China)

机构地区：[1]广东省珠宝玉石及贵金属检测中心,广东广州510080

出　　处：《超硬材料工程》2023年第5期56-60,共5页Superhard Material Engineering

摘　　要：采用X射线荧光能谱仪对珍珠进行微量元素含量测定,用于区分海水珍珠和淡水珍珠。使用自研的参考样品建立工作曲线,对已知来源珍珠样品的微量元素Mn、Sr含量进行测定。测试条件为电压30 kV,滤光片Pd medium,电流设置为自动,测试时间60 s。测试结果表明,海水珍珠中Sr质量分数大于780×10^(-6),Mn质量分数小于45×10^(-6);淡水珍珠中Sr质量分数小于900×10^(-6),Mn质量分数大于100×10^(-6)。通过对比珍珠样品中Mn和Sr的含量,可以快速区分海水珍珠和淡水珍珠。Testing trace element content of pearls by using X-ray fluorescence spectroscopy(XRF)to distinguish freshwater pearls from saltwater pearls.Using some known samples to create a standard curve with the working condition of voltage being 30 kV,Pd medium filter,auto current and testing time being 60 s,to calculate the content of Sr/Mn in the pearls.The result shows that Sr mass fraction of saltwater pearl is greater than 780×10^(-6),Mn mass fraction is less than 45×10^(-6);Sr mass fraction of freshwater pearl is less than 900×10^(-6),Mn mass fraction is greater than 100×10^(-6).By calculating the content of Mn/Sr can quickly differentiate the variety of freshwater pearls from saltwater pearls.

关 键 词：X射线荧光能谱仪 微量元素含量 海水珍珠 淡水珍珠 鉴定 

分 类 号：TS933[轻工技术与工程]