Production place identification method of Shandong sapphire

An identification method, sapphire technology, applied in the direction of testing jewelry, measuring devices, instruments, etc., can solve the problems of difficulty in obtaining matrix matching standards and dependence on accuracy, and achieve the effect of reliable basis, accurate identification results, and simple operation steps

Inactive Publication Date: 2019-04-23
SHANDONG MEASUREMENT SCI RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] There are many problems in the application of LA-ICP-MS technology: the accuracy of the analysis results depends on the physical and chemical properties, distribution uniformity and surface state of the solid sample, and it is difficult to obtain the standard of matrix matching

Method used

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  • Production place identification method of Shandong sapphire
  • Production place identification method of Shandong sapphire
  • Production place identification method of Shandong sapphire

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Embodiment

[0025] (1) Sample

[0026] Five sapphires from Xinwang Village, Wutu Town, Changle, Shandong Province were used as samples to be identified. The crystals of the above samples were mostly small and incomplete, with good color and transparency. They were blue in different shades, and some samples had visible color bands. The 5 sample numbers are M1, M2, M5, Z6, Z7 respectively. The sample diameter is between 3-5mm, and the weight range after grinding and polishing is between 0.076-0.28g.

[0027] (2) Identification methods and equipment

[0028] In order to effectively reduce the influence of matrix effect and fractionation effect on the analysis results. The present invention uses an external standard-internal standard combined calibration method to compensate for these changes.

[0029] The internal standard correction method mainly corrects the measurement deviation caused by fractionation effect and matrix effect. Since it is difficult to quantitatively add internal stan...

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Abstract

The invention relates to the technical field of precious stone production place identification, and particularly discloses a production place identification method of Shandong sapphire. The productionplace identification method of Shandong sapphire is characterized by comprising the following steps of preparing a sapphire sample to be identified; performing appearance inspection on the sapphire samples; using an LA-ICP-MS technology for performing trace element detection on the sapphire samples; performing analysis result calibration by an external standard-internal standard combined calibration method; using the Al content measured by an electronic probe testing technology as the internal standard; using an artificial synthetic silicate glass NIST SRM 642 reference sample invented by theU.S. National Institute of Standards and Technology (NIST) as the external standard; through inspection identification, using relatively higher V content and high Ga content as the features to perform distinguished identification on the Shandong sapphire. The operation steps are simple; the identification method is scientific and reasonable; the identification result is accurate; the trace element content is used as the distinguishing features; the basis is reliable; the method is suitable for being widely popularized and applied.

Description

(1) Technical field [0001] The invention relates to the technical field of gem origin identification, in particular to a method for identifying the origin of Shandong sapphire. (2) Background technology [0002] The sapphires in Changle, Shandong are produced from basalt-type deposits, and the sapphire resources are abundant. The colors can be divided into blue series, yellow series and various color combination series. Changle sapphires that appear in large quantities on the market are mostly dark blue or blue-black, and are very distinctive in terms of color and inclusions. For blue sapphires with a very clean interior, no inclusions, and unusual colors, it is often very difficult to judge the origin. [0003] Laser ablation inductively coupled plasma-mass spectrometry (laser ablation-inductively coupled plasma-mass spectrometry, LA-ICP-MS) is an analytical and testing method for studying the composition and distribution characteristics of substances from a microscopic pe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/87G01N27/62G01N23/2252
CPCG01N21/87G01N23/2252G01N27/628
Inventor 马霄朱红伟程佑法李婷黄准丁秀云
Owner SHANDONG MEASUREMENT SCI RES INST
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