CN-121978078-A - Method for identifying types of organic matters in jadeite based on D/G peak of laser Raman spectrum

Abstract

The invention relates to the technical field of jadeite detection, in particular to a method for identifying the types of organic matters in jadeite based on a laser Raman spectrum D/G peak. The trace unsaturated hydrocarbon component (< 10%) of the solid wax oil in the jadeite can induce a D peak (1350+/-20 cm ‑1 ) and a G peak (1600+/-20 cm ‑1 ) under the laser thermal effect, and based on the trace unsaturated hydrocarbon component, the method for distinguishing the types of the organic matters in the jadeite based on the D/G peak of the laser Raman spectrum is developed for the first time, for example, when the D peak and the G peak in the laser Raman spectrum occur at the same time or only the G peak occurs, the organic matters in the jadeite are judged to be the solid wax oil, the jadeite can be judged to be the natural A-type jadeite based on the trace unsaturated hydrocarbon component, so that the corresponding relation between the unsaturated olefin component in the wax oil and the D/G peak of the Raman spectrum is established, and the blank of qualitative analysis of the organic matters in the jadeite is filled.

Inventors

• WANG CHUNYUN
• WANG QIMEI
• YANG YUKUN
• YANG YUHUA

Assignees

• 王春云

Dates

Publication Date

20260505

Application Date

20260211

Claims (5)

1. 1. The method for identifying the types of the organic matters in the jadeite based on the D/G peak of the laser Raman spectrum is characterized by comprising the following steps of: 1) Cleaning the jadeite; 2) Detecting organic matters in the jadeite by using a confocal microscopic laser Raman probe to obtain a Raman spectrum; 3) Identifying and analyzing the Raman spectrum obtained in the step 2), and identifying whether a D peak of 1350+/-20 cm -1 and a G peak of 1600+/-20 cm -1 exist in the Raman spectrum or not, if the D peak and the G peak exist simultaneously or only the G peak exists and no resin characteristic peak exists in the Raman spectrum, judging that the organic matters contained in the jadeite are natural solid paraffin, and judging that the jadeite is natural A-cargo jadeite; The characteristic resin peaks include 1110cm -1 、1184cm -1 、1607cm -1 and 3067 cm -1 peaks.
2. 2. The method for identifying the types of organic matters in jadeite based on the D/G peak of the laser Raman spectrum according to claim 1, wherein the jadeite in the step 1) is Mingqing and the old jadeite before the Mingqing.
3. 3. The method for identifying the types of organic matters in jadeite based on the D/G peak of the laser Raman spectrum according to claim 1, wherein the confocal microscopic laser Raman probe in the step 2) is provided with microscopic amplifying and micro-area pointing devices.
4. 4. The method for identifying the types of organic matters in jadeite based on the D/G peak of laser Raman spectrum according to claim 1, wherein the solid paraffin comprises natural waxy petroleum of old pit seeds or biological wax infiltrated by an ancient method wax stewing process.
5. 5. The method for identifying the types of the organic matters in the jades based on the DG peak of the laser Raman spectrum according to claim 1, wherein the laser irradiation time is controlled within 60 seconds when the confocal micro-laser Raman probe is used for detection in the step 2).

Description

Method for identifying types of organic matters in jadeite based on D/G peak of laser Raman spectrum Technical Field The invention relates to the technical field of jadeite detection, in particular to a method for identifying the types of organic matters in jadeite based on a laser Raman spectrum D/G peak. Background The old jades (old feicui or antique feicui, antique jadeite jade, heritage feicui) refer to all jades finished products which are optimized by ancient method wax stewing with biological wax in the manual age before the appearance of the human electrician age, and comprise the old pit seeds used as river bed transfer stones and the new pit mountain materials used as primary veins, wherein the old pit seeds are main old jades, compared with the new pit mountain materials (called 'new jades', new feicui, modern feicui) which are processed by human beings in the electrician age and are internally free of organic matters. The old jadeite, whether the old pit seed material mined before 1881 or the new pit mountain material mined after 1881, is stewed with wax by an ancient method in the final stage of the finished product, and biological wax is permeated into the internal structure. According to the general life knowledge of people, the old jades are also jades, and the probability of the existence of organic matters including resin glue inside the old jades is very small like most of other stones in the nature. The definition characteristics of the old jades are focused on the old manual processing and the old method wax stewing optimization, and specifically comprise 1) the old of times, the manual age before the electric tool age, specifically, before 1958, 2) the old pit seeds, and part of new pit mountain materials produced in 1881-1958, 3) the old manual processing belongs to a manual driving gyroscope, 4) the old manual processing is generally subjected to a plum syrup boiling or straw ash juice soaking cleaning process and a later old method wax stewing process (biological wax including beeswax and insect wax is generally adopted), the biological wax permeates into the internal structure of the jades in a liquid state through jades capillary holes, loose boundaries and ice cracks, and is solidified and crystallized and filled after cooling, so that the old jades are bright, warm and moist and crystal are enabled to be transparent, and 5) blue-white fluorescence is generally emitted under ultraviolet fluorescence, and a small amount of grass green or orange fluorescence is emitted. The new jadeite (new feicui), also called new engineering jadeite (new-fashioned feicui), new pit jadeite (newpit feicui) and new pit mountain material (NEWPIT PRIMARY feicui) refer to new pit mountain material jadeite (NEWPIT PRIMARY feicui) mined from the back mountain area of the upstream of the great open river after 1881 years, and is a product of high-speed polishing and polishing processing of modern electricians, the surface of the new jadeite product presents clean and nondestructive glass light reflected by a mirror surface, and the later wax (commonly modern chemical paraffin) optimization process of the new jadeite product can not penetrate through the mirror surface to penetrate into the internal structure of the jadeite no matter in the liquid state of stewing wax or the solid state of waxing wax, and only can polish on the surface of the new pit mountain material jadeite product, thereby playing the roles of shielding broken lock, dirty color, flaws and the like and beautifying the light color. The jadeite grade A, namely natural, bleaching-free, glue-injection-free and dyeing-free jadeite, comprises new pit mountain materials without organic matters inside and old pit seed materials with organic matters inside (not necessarily plastic resin and/or dye), is an optimization (improvement) accepted by society and industry in the process shops of the prior manual age of the electrician, through plum juice, grass-soaking ash juice and biological wax, whether mountain materials or seed materials. The definition accords with the definition and the regulation of the recommended national standard GB/T16552-2017 "jewelry Jade naming" on optimization. The B-type (B type feicui) jadeite is artificial strong acid and alkali corrosion, namely chemical treatment (or bleaching bleaching) and glue injection (polymerimpregnation), and the natural structure and luster of the jadeite are changed by the technology of bleaching and glue injection, so that the technology is not a treatment accepted by society and industry. The definition accords with the definition and the regulation of the recommended national standard GB/T16552-2017 "jewelry Jade naming" on treatment. B+C (B+ C type feicui), artificial strong acid and alkali corrosion is chemical treatment (or bleaching bleaching), glue injection (polymer impregnation) and dyeing (coloring or dying), and the natural structure, luster and color of the jades are changed by