Method for judging pearl attributes of brackish seawater based on quantitative relation of trace elements strontium and calcium

A trace element, fresh seawater technology, applied in the field of pearl identification, can solve the problems of Sr/Ca ratio variation, pearl traceability and qualitative non-judgment, and achieve the effect of reliable judgment structure, non-destructive testing method and simple testing equipment.

Inactive Publication Date: 2020-08-07
浙江方圆检测集团股份有限公司
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Problems solved by technology

Although the above studies have proposed specific detection and judgment methods, there are the following problems: First, in the early detection, it can be seen that there are a large number of pearl samples with Sr / Ca ratios ranging from 0.37 to 0.46, so the traceability of pearls is qualitative. existence undeterminability
In recent years, with the pollution of the water environment where pearls are cultivated, the trace elements in pearls must also have certain changes. Since Sr participates in the biomineralization process of pearls, it will inevitably have a greater impact on the content of Sr in pearls ([1] Kisakurek B, Eisenhauer A, Bohm F, et al. Controls on shell Mg / Ca and Sr / Ca in cultured planktonic foraminiferan, Globigerinoides ruber (white). Earth and Planetary Science Letters, 2008; [2] NiG X, Shu B, Huang G T, et al.The effect of strontium incorporation into hydroxyapatites on their physical and biological properties.Journal of BiomedMater Research B:Applied Biomateris.2012,100:562-568), especially the effect of Sr on the crystallization of biological calcium carbonate There is a direct impact on the type of pearls, and the quality of pearls is directly related to the calcium carbonate content in pearls. Therefore, artificially adding Sr elements to regulate the quality of pearls has potential applications, so it will also lead to significant changes in the ratio of Sr / Ca

Method used

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  • Method for judging pearl attributes of brackish seawater based on quantitative relation of trace elements strontium and calcium
  • Method for judging pearl attributes of brackish seawater based on quantitative relation of trace elements strontium and calcium
  • Method for judging pearl attributes of brackish seawater based on quantitative relation of trace elements strontium and calcium

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Experimental program
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Embodiment 1

[0025] The model of energy dispersive X-ray fluorescence spectrometer is Japan Shimadzu EDX-7000; test channel Al~U, test voltage 50kV, test current 100uA; integration time 30s, collimator set to 5mm; qualitative and quantitative measurement mode.

[0026] The sample S1 to be tested is a marine cultured gray pearl, nearly perfect circle, the pearl diameter is 7.94mm, and the test area is 6 places. The data obtained from the test are shown in Table 1 below.

[0027] The Mn and Sr element test results of each test area of ​​the sample to be tested in Table 1 Example 1

[0028] test point Mn(Wt%) Sr (Wt%) Sr / Mn 1 0.006 0.091 15.17 2 0.004 0.092 23 3 0.005 0.089 17.8 4 0.007 0.092 13.14 5 0.006 0.089 14.83 6 0.007 0.089 12.71 average value 0.006 0.090 15.49

[0029] From the above table it can be seen that when Satisfy and R≤ 0.170 , N≤ 0.01, Therefore, the cultivation environment of the pearls inspected is...

Embodiment 2

[0031] The energy dispersive X-ray fluorescence spectrometer is an energy dispersive X-ray fluorescence spectrometer, the instrument model is Shimadzu EDX-7000; the test channel is Al~U, the test voltage is 50kV, and the test current is 100uA; the integration time is 30s, and the collimator is set to 5mm; qualitative Quantitative measurement mode.

[0032] The sample S2 to be tested is a seawater cultured black pearl with a diameter of 11.05 mm and 9 test points. The data obtained from the test are shown in Table 2 below.

[0033] The Mn and Sr element test results of each test area of ​​the sample to be tested in Table 2 Example 2

[0034]

[0035]

[0036] From the above table it can be seen that when Satisfy and R≤ 0.170 , N≤ 0.01, Therefore, the cultivation environment of the pearls inspected is seawater environment, and the pearls are seawater pearls.

Embodiment 3

[0038] The energy dispersive X-ray fluorescence spectrometer is an energy dispersive X-ray fluorescence spectrometer, the instrument model is Shimadzu EDX-7000; the test channel is Al~U, the test voltage is 50kV, and the test current is 100uA; the integration time is 50s, and the collimator is set to 5mm; qualitative Quantitative measurement mode.

[0039] The sample S2 to be tested is a seawater cultured white pearl with a diameter of 14.25 mm and 6 test areas. The data obtained from the test are shown in Table 3 below.

[0040] The Mn and Sr element test results of each test area of ​​the sample to be tested in Table 3 Example 3

[0041]

[0042] From the above table it can be seen that when Satisfy And R≤0.170, N≤0.01, so the cultivation environment of the pearls inspected is seawater environment, and the pearls are seawater pearls.

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Abstract

The invention discloses a method for judging pearl attributes of brackish seawater based on a quantitative relation of trace elements strontium and calcium. According to the method, an energy dispersion X-ray fluorescence spectrometer is used for carrying out element content detection and collection on different positions of the surface of the pearl, and tracing judgment of the fresh seawater culture environment of the pearl is carried out on the basis of the content of trace elements strontium and manganese in the pearl and the ratio relation of Sr to Mn. The identification equipment is widein application degree, the identification method is nondestructive, rapid and universal, the qualitative judgment method is simple, and a reliable judgment basis can be provided for tracing judgment and identification of the fresh seawater culture environment related to pearls in daily detection.

Description

technical field [0001] The invention relates to the field of pearl identification, in particular to a method for judging the properties of fresh seawater pearls based on the quantitative relationship of trace element strontium calcium. Background technique [0002] Pearl (Pearl) is a type of organic gem mainly composed of biogenic aragonite (95wt%) and protein. It is one of the most common and highly accepted organic gem varieties in jewelry circulation and trading markets. According to the pearl culture market research, before 2010, freshwater pearls were mainly non-nuclear cultured pearls, and nucleated pearls were basically seawater pearls. However, in recent years, with the upgrading of pearl cultivation technology, compared with non-nuclear pearls, freshwater nucleated pearls have a shorter cultivation cycle, larger diameter pearls and mostly perfect circles. According to incomplete statistics, freshwater pearls with nuclei have occupied half of the freshwater pearl ci...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N23/223
CPCG01N23/223G01N2223/076G01N2223/1016G01N2223/652
Inventor 方诗彬彭秋瑾俞丹燕刘晋华胡丹静王巨安严雪俊严俊
Owner 浙江方圆检测集团股份有限公司
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