Method for nondestructively inspecting pearl qualities

一种非破坏性、珍珠的技术，应用在珍珠品质的非破坏性判定领域，能够解决珍珠层基质蛋白没有研究等问题，达到快速且简便测定、操作简单、容易使用的效果

Active Publication Date: 2012-07-04
K MIKIMOTO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no study on the status of nacre matrix proteins such as conchiolin, and the measurement method also uses X-ray diffraction

Method used

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  • Method for nondestructively inspecting pearl qualities
  • Method for nondestructively inspecting pearl qualities
  • Method for nondestructively inspecting pearl qualities

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0092] (1-1) Materials and methods

[0093] As the test materials, 20 Akoya shell pearls with a diameter of 6.0-7.0 mm and a nacre powder sample obtained from the Akoya shell nacre were used. It should be noted that about 250 g of a nacre powder sample was obtained by completely removing the prismatic layer and the bright layer part from 50 shells of Akoya mussels (3-year-old mussels) produced by artificially harvesting seedlings using a grinder, and pulverized When the particle diameter is less than 0.3 mm, a nacre powder sample is obtained. The processing of the sample is basically carried out in a cool and dark place away from light.

[0094] (1-2) Measurement of reflection spectrum

[0095] The reflectance spectrum in the wavelength range of 200-550 nm was measured using the spectrophotometer (V-570, JASCO Corporation) equipped with the integrating sphere. In addition, the photomask (mask) of 5 mm size was used for the measurement.

[0096] (1-3) Measurement of fluores...

Embodiment 2

[0115] Non-destructive evaluation of the effects of pharmaceutical (bleaching) treatments on Akoya pearls.

[0116] It should be noted that the measurement method and measurement device are the same as in Example 1.

[0117] Specifically, Akoya pearls (36 untreated beads with a diameter of 5.5 mm) were prepared and divided into 4 groups. The processing conditions of each group are as follows: process A (bleach concentration: 1.5%, solvent: water); process B (bleach concentration: 3.0%, solvent: water); process C (bleach concentration: 1.5%, solvent: alcohol system solvent); treatment D (bleach solution concentration: 3.0%, solvent: alcohol-based solvent).

[0118] In addition, as a bleaching liquid, the commercially available bleaching liquid commonly used in this field was used.

[0119] The spectral reflectance R at 254 nm was measured over time (from the day the treatment started to 40 days later) for the pearls of each treatment condition. 254 The value of the spectral ...

Embodiment 3

[0131] Prepare 771 normal white butterfly pearls and 8 deteriorating white butterfly pearls (acquired by people in the industry respectively), carry out the same operation as embodiment 2, and measure the spectral reflectance ratio R of these pearls 254 / 282 and fluorescence evaluation values ​​in the ultraviolet region.

[0132] The result is as Figure 8 As shown in A.

[0133] And, in the same manner as in Example 2, the spectral reflectance ratio R of 74 pearls randomly selected from normal white butterfly pearls and 8 deteriorating white butterfly pearls was measured. 254 / 282 , 340nm fluorescence intensity value (FI 340 ) and fluorescence evaluation values ​​in the ultraviolet region.

[0134] The result is as Figure 8 B~ Figure 8 D shows.

[0135] It can be seen from the results: due to the R of the pearls of batch 2 (○) 254 / 282 、FI 340 The fluorescence evaluation values ​​in the UV and UV regions are both low, so it can be judged that the pearls are deteriorati...

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Abstract

Provided is a method for nondestructively inspecting pearl qualities, said method comprising measuring the reflection spectrum of a pearl or pearl oyster shell, that is to be inspected, from the ultraviolet region to the visible region and / or measuring the fluorescent spectrum thereof from the ultraviolet region to the visible region, and then comparing the thus obtained value with a pre-measured value of a normal pearl or pearl oyster shell. Also provided is a device for nondestructively inspecting pearl qualities. According to the present invention, the qualities of a target pearl or pearl oyster shell can be nondestructively, easily and quickly inspected.

Description

[0001] related application [0002] This application is based on Japanese Patent Application No. 2010-187465 (filing date: August 24, 2010 ), which is a prior Japanese patent application, and the benefit of priority is claimed, and the entire disclosure thereof is incorporated herein by reference. technical field [0003] The invention relates to a non-destructive judging method of pearl quality. Background technique [0004] Pearls such as Akoya pearls (アコヤ珍珠), white butterfly pearls (シロチヨウウウウウウウウウウ珠), penguin pearls (マベヨウウウ珠), penguin pearls (マベヨウ珠), freshwater pearls are composed of a nacre structure consisting of multiple layers consisting of 200 ~700nm aragonite calcium carbonate crystals and a thin film formed of hard protein (matrix protein), the unique pearl luster of pearls is produced by this multi-layer thin film structure. [0005] Among the organic matrix in pearls collectively known as conchiolins, Nacreous Shell Matrix Proteins (NSMPs) play an important role ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/87G01N21/27G01N21/64A01K61/00
CPCG01N21/55G01N21/6456G01N21/87G01N2021/6417G01N33/381G01N21/95
Inventor 永井清仁平松润一岩桥德典
Owner K MIKIMOTO
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