Identification of Saltwater Cultured Pearls and Freshwater Cultured Pearls by Using X-ray Fluorescence Spectroscopic Technique
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摘要: 采用X荧光能谱技术研究珍珠中微量元素的种类及其质量分数,以达到无损鉴别淡水珍珠和海水珍珠的目的。利用X射线荧光能谱仪优选适合的激发工作条件,通过设定相同的工作条件,获得珍珠主量元素和微量元素的能量色散图谱,定性分析其主量元素和微量元素的组合关系。其中,Mn的特征峰与Sr/Ca计数比率对鉴别珍珠品种有重要的指示意义。研究表明,在电压为30~35kV、电流为0.50~0.80mA、滤光片PdThick的测试条件下,淡水珍珠一般具有Ca+Sr+Mn的组合关系,海水珍珠具有Ca+Sr的组合关系;淡水珍珠中的Sr/Ca介于0.14~0.37,海水珍珠中的Sr/Ca介于0.46~0.71。综合利用元素的组合关系和Sr/Ca计数比率,可快捷、无损地鉴别珍珠品种。Abstract: X-ray fluorescence spectroscopic technique(XRF) is used for studying the varieties and contents of trace elements of pearls in order to distingush the freshwater cultured pearls from saltwater cultured pearls.The optimizing working conditions of XRF for detecting the main and trace elements of pearls are also studied. The characteristic peaks of Mn and the values of Sr/Ca could be qualitatively analysed for distinguishing the varieties of pearls. With the working conditions of voltage being 30~35 kV,current being 0.50~0.80 mA and Pd Thick filter,element combination is Ca+Sr+Mn and the ratio of Sr/Ca is in a range from 0.14 to 0.37 for the freshwater cultured pearls; the element combination is mainly Ca and Sr,and the ratio of Sr/Ca is in a range from 0.46 to 0.71 for saltwater cultured pearls.Combined with element constituents and the ratio of Sr/Ca,saltwater cultured pearls could be nondestructively and quickly identified from the freshwater cultured pearls.
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[1] Ahmadjan Abduriyi m,Eiko ITO,Hiroshi KITAWAKI,et al.Application of LA-ICP-MS(Laser Ablation-Inductively Coupled Plasma-Mass Spectrometry)to identification of pearl nuclus[J].Research Lab Report,2004,25(Fall):87—88.
[2] 木士春,马红艳.养殖珍珠微量元素特征及其对珍珠生长环境的指示意义[J].矿物学报,2001,21(3):551—553. [3] 李立平.海水及淡水养殖珍珠的物质组成[J].地质科学,2009,34(5):752—758. [4] 杜安道,孙秀峰,高月英.淡水珍珠中24种元素的中子活化分析[J].淡水渔业,1985,(4):29—32. [5] 刘承松,陈婉颜,谢玉坎.大珠母贝贝壳珍珠层的化学成分研究[J].动物学杂志,1984,(4):729. [6] 毛振伟,陈顺喜.无核淡水褶纹冠蚌珍珠组分和热性能的研究[J].上海农业科技,1996,(6):32—33. [7] 王慧,封余军,郑碧华,等.等离子体发射光谱分析珍珠贝贝壳结晶的微量元素[J].湖北农学院学报,1998,18(2):142—144. [8] 张刚生,谢先德,温桂兰,等.珍珠层中的锰及其电子顺磁共振谱特征[J].海洋科学,2003,27(4):44—48. [9] 张刚生,谢先德.贝壳珍珠层微结构及成因理论[J].矿物岩石,2000,20(1):11—16. [10] Habermann D,Banerjee A,Meijer J,et al.Investigation of Manganese in salt-and freshwater pearls[J].Nuclear Instruments and Methods in Physics Research B,2001,181(1—4):739—743.
[11] 高岩,杨德辉,杨军涛.X荧光能谱技术应用于珠宝首饰检测的原理和方法[J].宝石和宝石学杂志,2000,2(3):8—12.
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