Detection method of rubidium mineral substance

Abstract

The invention discloses a rubidium mineral substance detection method. The method comprises the following steps: carrying out XRD (X-Ray Diffraction) test on sample powder to be tested, and collecting an XRD spectrum of the sample powder; performing phase analysis on the XRD spectrum, and matching obtained diffraction data with a standard card in an XRD-PDF card library to obtain a phase analysis result; carrying out calibration and peak searching processing on the XRD spectrum, selecting common characteristic peaks with high intensity, and drawing an XRD Fourier characteristic spectrum; and respectively comparing the phase analysis result and the XRD Fourier characteristic spectrum of the sample to be detected with the phase spectrum and the XRD Fourier fingerprint spectrum of the rubidium mineral substance. The method can provide a scientific basis for identification, quality control and evaluation of the rubidium mineral substance, has very important significance for subsequent application (especially application in the field of biological medicine) of the rubidium mineral substance, and is beneficial to promoting development and utilization of rubidium mineral resources.

Description

Technical Field

[0001] The present invention relates to the field of analytical technologies, and particularly to a method for detecting rubidium minerals. Background Art

[0002] Rubidium (Rb) is the 16th most abundant element in the earth's crust, is ubiquitous in nature, and is also one of the trace elements required by the human body. As a Group 1 alkali metal, rubidium (Rb + ), has biochemical characteristics similar to those of K + . Due to the ability of Rb + to exchange with K + , Rb + can be present in almost all biological systems and has unique neurophysiological functions, myocardial physiological functions, and anti-cancer functions, and can be used to treat other diseases such as the nervous system, cardiovascular system, urinary system, and senile cataract (Wang Huanlin. Basic and Clinical Research on Rubidium Antidepressants [J]. Foreign Medical Sciences. Psychiatry Section, 1989(2): 81-83.; Betts R P, Paschalis C, Jarratt J A, et al. Nerve fibre refractory period in patients treated with rubidium and lithium [J]. Journal of Neurology, Neurosurgery, and Psychiatry, 1978, 41(9): 791-793.; Krachler M, Lindschinger M, Eber B, et al. Trace elements in coronary heart disease: Impact of intensified lifestyle modification [J]. Biological Trace Element Research, 1997, 60(3): 175-185.; Yuan Ailing, Zhang Fengyun. Investigation and Prevention of the Etiology of Senile Cataract [J]. Journal of Heze Medical College, 1998(2): 81.).

[0003] Rubidium has unique geochemical characteristics and is usually symbiotic with other rare metals such as lithium, beryllium, selenium, and tantalum. Rubidium resources mainly exist in granitic pegmatites, brines, and potash deposits. For the rubidium minerals obtained from the development and extraction of rubidium ore resources, in addition to being used in the fields of high-tech, industrial modification, energy, and catalysts, they can also be used in the fields of biomedicine and health food (such as described in Chinese patent applications CN202311194273.X, CN202311233290.X, CN202311233292.9, etc.), and have good application prospects. Developing an accurate and reliable detection method for the extracted rubidium minerals is of great significance for their subsequent applications (especially in the field of biomedicine), and is conducive to promoting the development and utilization of rubidium ore resources. Summary of the Invention

[0004] Considering the application prospects of rubidium ore resources in the fields of biomedicine and health food, the present invention provides a method for detecting rubidium minerals and a method for constructing their characteristic spectra.

[0005] In the first aspect of the present invention, a method for constructing a characteristic spectrum of rubidium minerals is provided, and the method includes the following steps: (1) Take the test sample powder for X-ray diffraction (XRD) testing and collect the XRD spectrum of the sample powder; (2) Perform phase analysis on the XRD spectrum, match the obtained diffraction data with the standard cards in the XRD-PDF card library, and obtain the phase analysis result; (3) Calibrate and peak search the XRD spectrum, select the common characteristic peaks with large intensities, and draw the XRD Fourier fingerprint spectrum.

[0006] Specifically, the rubidium mineral is a mineral separated and extracted from rubidium-containing feldspar, which contains potassium, sodium, calcium, magnesium, and rubidium; it can be used as a natural potassium, sodium, calcium, magnesium, and rubidium combined mineral nutrient supplement for preparing health products, drugs, etc., as described in Chinese patent applications CN202311194273.X, CN202311233290.X, CN202311233292.9, etc.

[0007] Specifically, the method may further include a step for preparing the test sample powder: Take the rubidium mineral to be tested, crush it, and pass through a 320-mesh sieve to obtain the test sample powder for standby.

[0008] Specifically, the XRD test conditions include: the incident light source is Cu target Kα radiation, filtered by a Ni sheet, the working voltage of the X-ray tube is 40 kV, and the current is 40 mA; the aperture system is DS = SS = 1°; RS = 0.3 mm.

[0009] Specifically, the XRD uses a continuous scanning method; more specifically, in the continuous scanning method, the scanning speed is 5° / min, the 2θ resolution is 0.02°, and the scanning range is 5 - 90°.

[0010] Specifically, according to step (2), the rubidium mineral mainly contains: [Na 0.98 Ca 0.02 [Al 1.02 Si 2.98 O 8 , Na[AlSi 3 O 8 , and K[AlSi 3 O 8 , and the phase diagram is as shown in Figure 3 of the present invention.

[0011] Specifically, according to step (3), the XRD Fourier fingerprint of the rubidium mineral has characteristic peaks at 2θ angles of 13.82 ± 0.04°; 20.92 ± 0.02°; 22.49 ± 0.49°; 23.47 ± 0.43°; 23.49 ± 0.03°; 24.23 ± 0.03°; 25.48 ± 0.04°; 26.34 ± 0.02°; 27.35 ± 0.01°; 27.85 ± 0.01°; 29.35 ± 0.01°; 30.08 ± 0.02°; 30.77 ± 0.37°; 34.93 ± 0.01°; 41.74 ± 0.02°; 42.49 ± 0.07°; 50.46°; 51.10 ± 0.04°, as shown in Figure 4 and Table 2 of the present invention.

[0012] In the second aspect of the present invention, a fingerprint of a rubidium mineral is provided, which is constructed by the method described in the first aspect of the present invention.

[0013] Specifically, the fingerprint of the rubidium mineral has characteristic peaks at 2θ angles of 13.82 ± 0.04°; 20.92 ± 0.02°; 22.49 ± 0.49°; 23.47 ± 0.43°; 23.49 ± 0.03°; 24.23 ± 0.03°; 25.48 ± 0.04°; 26.34 ± 0.02°; 27.35 ± 0.01°; 27.85 ± 0.01°; 29.35 ± 0.01°; 30.08 ± 0.02°; 30.77 ± 0.37°; 34.93 ± 0.01°; 41.74 ± 0.02°; 42.49 ± 0.07°; 50.46°; 51.10 ± 0.04°, as shown in Figure 4 and Table 2 of the present invention.

[0014] In a third aspect of the present invention, a method for detecting rubidium minerals is provided, which comprises the following steps: (1) Taking a powder of the sample to be tested for X-ray diffraction (XRD) testing, and collecting the XRD pattern of the sample powder; (2) Conducting a phase analysis on the XRD pattern, matching the obtained diffraction data with the standard cards in the XRD-PDF card library, and obtaining the phase analysis result; (3) Calibrating and peak searching the XRD pattern, selecting the common characteristic peaks with large intensities, and plotting the XRD Fourier characteristic pattern; (4) Comparing the phase analysis result of the sample to be tested and the XRD Fourier characteristic pattern with the phase pattern of rubidium minerals and the XRD Fourier fingerprint pattern (as described in the first aspect) respectively to identify or conduct quality control and evaluation on the sample.

[0015] Specifically, step (2) includes: using software (such as Jade 6.0) to conduct a phase analysis on the XRD pattern of rubidium minerals, matching the obtained diffraction data with the standard cards in the 2004 version of the XRD-PDF card library, and obtaining the phase analysis result.

[0016] Specifically, step (3) further includes using software (such as JADE 6.0) to calculate the 2θ, peak intensity I / I 0 and lattice spacing d of each characteristic peak.

[0017] Specifically, in step (2), the substances for phase analysis include [Na 0.98 Ca 0.02 [Al 1.02 Si 2.98 O 8 , Na[AlSi 3 O 8 , K[AlSi 3 O 8 , Rb 2 O; in step (4), the phase pattern of rubidium minerals is as Figure 3 shown; the comparison includes comparing the contents of [Na 0.98 Ca 0.02 [Al 1.02 Si 2.98 O 8 , Na[AlSi 3 O 8 , K[AlSi 3 O 8 , Rb 2 O in the sample to be tested with Figure 3 for comparison.

[0018] Specifically, in step (4), the XRD Fourier fingerprint spectrum of the rubidium mineral is as follows Figure 4 shown, and the comparison includes comparing the characteristic peaks, their 2θ angles, and lattice spacings of the XRD Fourier characteristic spectrum of the sample to be tested with the fingerprint spectrum.

[0019] Specifically, the method may further include a step of preparing the powder of the sample to be tested: taking the sample to be tested, crushing it, and passing it through a 320-mesh sieve to obtain the powder for standby.

[0020] Specifically, the XRD test conditions include: the incident light source is Cu target Kα radiation, filtered by a Ni sheet, the working voltage of the X-ray tube is 40 kV, and the current is 40 mA; the aperture system is DS = SS = 1°; RS = 0.3 mm.

[0021] Specifically, the XRD uses a continuous scanning method; more specifically, in the continuous scanning method, the scanning speed is 5° / min, the 2θ resolution is 0.02°, and the scanning range is 5 - 90°.

[0022] In some embodiments of the present invention, the method further includes a step of performing multi-element chemical analysis of the sample to be tested by inductively coupled plasma mass spectrometry (ICP-MS). According to the ICP-MS analysis results, the main components of the rubidium mineral include: SiO 2 、Al 2 O 3 、K 2 O and Na 2 O.

[0023] In some embodiments of the present invention, the method further includes a step of performing thermogravimetric analysis on the sample to be tested; specifically, the conditions of the thermogravimetric analysis include a nitrogen gas flow rate of 20 ml / min, the temperature is gradually increased from room temperature to 800 °C at a rate of 10 °C per minute. According to the thermogravimetric analysis results, the rubidium mineral contains a certain amount of crystal water, and the weight loss is about 10% in the temperature range of 25 - 150 °C, and it is relatively stable at high temperatures.

[0024] In some embodiments of the present invention, the method further includes a step of performing infrared spectroscopy analysis on the sample to be tested; specifically, the conditions of the infrared spectroscopy analysis include: scanning and analyzing under the conditions of a wavelength range of 4000 - 400 cm -1 , 16 scanning times, and a resolution of 4 cm -1 .

[0025] In some embodiments of the present invention, the method further includes a step of performing optical microscopic feature analysis on the sample to be tested.

[0026] In some embodiments of the present invention, the method further includes the step of performing a scanning electron microscope image topography analysis on the sample to be tested.

[0027] In the fourth aspect of the present invention, there is provided an application of the methods described in the foregoing first and second aspects in the identification, quality control, and evaluation of rubidium minerals.

[0028] Specifically, the rubidium mineral is a mineral separated and extracted from a rubidium-containing deposit, which contains potassium, sodium, calcium, magnesium, and rubidium; it can be used as a natural potassium-sodium-calcium-magnesium-rubidium combined mineral nutrient supplement for the preparation of health products, pharmaceuticals, etc., as described in Chinese patent applications CN202311194273.X, CN202311233290.X, CN202311233292.9, etc.

[0029] The present invention provides a method for detecting rubidium minerals, which provides a scientific basis for the identification, quality control, and evaluation of rubidium minerals, and is of great significance for its subsequent applications (especially in the biomedical field), and is conducive to promoting the development and utilization of rubidium ore resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 Shown is a microscopic observation image of a rubidium mineral (×100).

[0031] Figure 2 Shown is a scanning electron microscope image of a rubidium mineral. From left to right, they are magnifications of ×1600, ×4000, and ×8000 respectively.

[0032] Figure 3 Shown is XRD phase analysis results of rubidium minerals.

[0033] Figure 4 Shown is the XRD Fourier characteristic fingerprint spectrum of a rubidium mineral; wherein, 1. (13.82 ± 0.04)°; 2. (20.92 ± 0.02)°; 3. (22.49 ± 0.49)°; 4. (23.47 ± 0.43)°; 5. (23.49 ± 0.03)°; 6. (24.23 ± 0.03)°; 7. (25.48 ± 0.04)°; 8. (26.34 ± 0.02)°; 9. (27.35 ± 0.01)°; 10. (27.85 ± 0.01)°; 11. (29.35 ± 0.01)°; 12. (30.08 ± 0.02)°; 13. (30.77 ± 0.37)°; 14. (34.93 ± 0.01)°; 15. (41.74 ± 0.02)°; 16. (42.49 ± 0.07)°; 17. (50.46)°; 18. (51.10 ± 0.04)°.

[0034] Figure 5The figure shows the thermogravimetric analysis diagram of rubidium minerals.

[0035] Figure 6 The figure shows the infrared spectrum diagram of rubidium minerals. Detailed implementation manners

[0036] Unless otherwise defined, all scientific and technical terms used in the present invention have the same meaning as commonly understood by those skilled in the technical field to which the present invention pertains.

[0037] The public contents of various publications, patents and published patent specifications cited herein are incorporated herein by reference in their entirety.

[0038] Next, in combination with the embodiments of the present invention, the technical solutions of the present invention will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts belong to the scope of protection of the present invention.

[0039] In the following embodiments, the MCR is a white powder containing rubidium, cesium-free, non-toxic and harmless, which was isolated and extracted by the inventor from the Xianglushan deposit, and named Minerals Containing Rubidium (MCR). Preparation of test samples: After crushing the rubidium minerals, they were ground fine in an agate mortar, passed through a 320-mesh sieve, and made into rubidium mineral sample powder for standby.

[0040] The experimental instruments used in the following embodiments include: X-ray diffractometer (D8 ADVANCE, Bruker Corporation, Germany); synchronous thermal analyzer (STA449F5, Netzsch GmbH, Germany); Fourier transform infrared spectrometer (IR Prestige-21, Shimadzu Corporation, Japan); scanning electron microscope (Quanta 250, FEI Company, USA); precision electronic balance (CP214, OHAUS Corporation, USA).

[0041] Example 1: Optical microscope analysis Take a little MCR sample powder, place it on a glass slide, add 1-2 drops of distilled water, cover it with a cover glass, and observe it under a microscope (×100).

[0042] Representative microscopic characteristic diagrams are as Figure 1 shown. The samples are in the form of irregular fragments or fragmented crystals. Some are white and transparent, some are slightly yellow or brownish, the surface is uneven, and the cross-section is layered. Most of the samples are in the form of irregular fragments.

[0043] Example 2: Scanning electron microscope analysis Appropriately take the MCR sample powder, sprinkle it on the sample stage with double-sided tape attached, place it on the high-efficiency coating platform of the ion sputtering instrument to spray gold, and observe and photograph the gold-sprayed sample under a scanning electron microscope (×1600, ×4000, ×8000).

[0044] As Figure 2 shown, under the scanning electron microscope, the morphology of the rubidium mineral (MCR) sample is irregular fragments or fragmented crystals, white or milky white powder, with clear edges and corners, a relatively smooth surface, and scattered irregular small fragments.

[0045] Example 3: Multi-element chemical analysis by inductively coupled plasma mass spectrometry Appropriately take the MCR sample powder. According to the "Methods for Chemical Analysis of Silicate Rocks" (Part 30, GB / T 14506.30 - 2010) promulgated by the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China in 2010, use an inductively coupled plasma mass spectrometer (Inductively coupled plasma-Mass Spectrometry, ICP-MS) and an X-ray fluorescence spectrometer for determination and analysis.

[0046] The results are shown in Table 1. The rubidium mineral is rich in various trace elements. Its main components are SiO 2 , Al 2 O 3 , K 2 O and Na 2 O, accounting for 66.37%, 19.28%, 6.78% and 6.31% respectively. Most of the remaining trace elements (Fe, Ti, Ba, Rb, Cu, Li, etc.) account for about 1%, and the types are rich. Combining Figure 1 - 2 analysis also shows that due to the complex composition of the rubidium mineral, containing various compounds, there are also many observed irregular fragments, each with its own characteristics.

[0047] Table 1 Detection results of chemical composition of rubidium mineral , Example 4: X-ray diffraction analysis Take a small amount of rubidium mineral powder that has passed through a 320-mesh sieve, flatten it with a glass plate in the groove of the sample plate, and collect the original XRD pattern of the sample powder according to the instrument operation procedure. The measurement parameter conditions are as follows: the incident light source is Cu target Kα radiation, filtered by a Ni sheet, the working voltage of the X-ray tube is 40 kV, and the current is 40 mA; the aperture system is DS = SS = 1°; RS = 0.3 mm. Use the continuous scanning method, the scanning speed is 5° / min, the 2θ resolution is 0.02°, the scanning range is 5 - 90°, and measure twice in parallel. Use Jade 6.0 software to perform phase analysis on the XRD pattern of the rubidium mineral, match the obtained diffraction data with the standard cards in the 2004 version of the XRD-PDF card library, and obtain the phase analysis results. And calculate the relative content of each mineral component according to the intensity of the diffraction peaks of each mineral. d is the lattice spacing (nm), with different 2θ diffraction angles as the abscissa and the corresponding relative intensity I / I 0 as the ordinate, and use Origin 2021 software to process and obtain the XRD Fourier fingerprint pattern of the rubidium mineral.

[0048] Apply MDI Jade6.0 software to perform phase retrieval and pattern comparison analysis on the sample in the 2004 version of the XRD-PDF card library to obtain Figure 3 the pattern results of the rubidium mineral. Figure 3 The analysis results show that the rubidium mineral mainly contains: K[AlSi 3 O 8 (Microcline maximum, d = 3.24, 4.21, 3.28, 3.36, 3.83), Na[AlSi 3 O 8 (AIbite low, d = 3.19, 4.02, 3.21, 3.66, 3.17), [Na 0.98 Ca 0.02 [Al 1.02 Si 2.98 O 8 (AIbite, d = 3.19, 4.03, 3.66, 3.21), Rb 2 O (Rubidium Oxide, d = 3.17, 3.02, 3.55, 3.57, 2.87, 2.19), among which [Na 0.98 Ca 0.02 [Al 1.02 Si 2.98 O 8 , Na[AlSi 3 O 8 , and K[AlSi 3 O 8The contents respectively account for 41.4%, 39.2% and 19.4%, and the rest account for relatively less, which is consistent with the above analysis results of the contents of various substances. The phase analysis shows that the rubidium mineral is a polycrystalline complex structure composed of a variety of mixed substances, rich in a variety of trace elements, mainly including Si, Al, O, K, Na, Ca and other elements.

[0049] Calibrate and find the peaks of the fingerprint spectrum of the rubidium mineral sample. After analysis and comparison, 18 common characteristic peaks with relatively large intensities are selected and plotted into the XRD Fourier fingerprint spectrum of the rubidium mineral, as shown in Figure 4 , and the 2θ, peak intensity I / I 0 and lattice spacing d of each peak are calculated by the software JADE 6.0, and the data are shown in Table 2. Combining Figure 4 and the data analysis in Table 2, it can be seen that among the 18 characteristic peaks of the rubidium mineral, the 9th peak (2θ = 27.35, d = 3.26, I / I 0 = 67.8) and the 10th peak (2θ = 27.85, d = 3.20, I / I 0 = 100) with the largest and most obvious intensities belong to the characteristic peaks of the mixed compounds of silicate and aluminum, potassium, and sodium elements.

[0050] Table 2 Peak positions (2θ), lattice spacings (d), and relative intensities obtained from the XRD Fourier analysis of the rubidium mineral sample , Example 5: Thermogravimetric analysis Accurately weigh 11.12 mg of rubidium mineral powder and place it in an alumina crucible, and use a synchronous thermogravimetric thermal analyzer to conduct an analysis experiment. The experimental conditions are: the nitrogen gas flow rate is 20 ml / min, the temperature gradually rises from room temperature to 800 °C, and the temperature rises 10 °C per minute.

[0051] The initial mass of the known sample is 11.12 mg, and the initial temperature is 25 °C. The thermogravimetric analysis diagram of the rubidium mineral is as shown in Figure 5 . It can be seen from Figure 5 that the stage with obvious weight loss changes during the whole experiment is concentrated at 25 - 150 °C. In this temperature range, the weight loss of the sample is about 10%. Especially when the temperature rises to about 100 °C, the weight loss rate of the rubidium mineral increases significantly during this period. It is speculated that this may be due to the evaporation of physically adsorbed water or crystal water on the surface of the sample. Generally speaking, the rubidium mineral is relatively stable at high temperatures, and the structure of the compound composition is not easily decomposed at high temperatures.

[0052] Example 6: Infrared spectrum analysis 1.5 mg of white powder of rubidium mineral that has been precisely weighed and passed through a 320-mesh sieve was used to measure its infrared spectrum by the KBr tablet pressing method. An IR Prestige-21 Fourier transform infrared spectrometer manufactured by Shimadzu Corporation of Japan was used, and the scanning was carried out in the wavelength range of 4000 - 400 cm -1 , with 16 scanning times and a resolution of 4 cm -1 .

[0053] The results are as Figure 6 shown. The absorption wavelengths of the infrared absorption spectrum of the rubidium mineral in the characteristic region are 3672 cm -1 and 3293.8 cm -1 respectively. This part belongs to the OH stretching vibration absorption. The absorption bands at around these two wavelengths can be attributed to the OH stretching vibration absorption of the interlayer water in the sample. The absorption intensity is related to the water content in the sample, which is consistent with the results of thermogravimetric analysis indicating that the rubidium mineral contains a certain amount of crystal water.

[0054] In the fingerprint region, the characteristic absorption wavelengths of 1143.9 cm -1 and 1006.7 cm -1 are respectively attributed to the stretching vibrations of Si—O and Si(Al)—O; at around 770.51 cm -1 and 727.4 cm -1 are the stretching vibrations of Si—Si and Si—Al(Si); at around 650 cm -1 , 594.1 cm -1 and 529 cm -1 are respectively attributed to the stretching vibration peak of Na—O and the bending vibrations of O—Si(Al)—O and Si—O—Si; at around 427 cm -1 is attributed to the stretching vibration of K—O. In summary, the results of the infrared absorption wavelength analysis of each functional group of the rubidium mineral are consistent with the results of XRD phase analysis, indicating that the rubidium mineral is mainly composed of silicate compounds such as Na[AlSi 3 O 8 , K[AlSi 3 O 8 and [Na 0.98 Ca 0.02 [Al 1.02 Si 2.98 O 8 .

[0055] In summary, the appearance characteristics of the rubidium mineral show irregular fragmented shapes and contain various compound crystals under an optical microscope and a scanning electron microscope; X-ray diffraction indicates that the main component of the rubidium mineral is [Na 0.98 Ca 0.02 [Al 1.02Si 2.98 O 8 , Na[AlSi 3 O 8 , and K[AlSi 3 O 8 , accounting for 41.4%, 39.2% and 19.4% respectively. At the same time, the characteristic fingerprint spectrum and the table of main characteristic peaks of rubidium minerals were plotted based on the 2θ, peak intensity I / I 0 and lattice spacing d of each peak; the thermogravimetric analysis results indicate that rubidium minerals are stable at high temperatures; the infrared spectrum shows typical characteristic absorption peaks of silicate metal minerals; ICP-MS multi-element chemical analysis found that the main chemical components of MCR are SiO 2 , Al 2 O 3 , K 2 O, and Na 2O, accounting for 66.37%, 19.28%, 6.78% and 6.31% respectively. Most of the remaining trace elements (Fe, Ti, Ba, Rb, Cu, Li, etc.) account for about 1%, which is consistent with the above analysis results; Silicate participates in multiple physiological processes of the human body and plays an important role especially in bone, connective tissue and skin health (Pritchard A, Nielsen B D. Silicon Supplementation forBone Health: An Umbrella Review Attempting to Translate from Animals toHumans[J]. Nutrients, 2024, 16(3): 339.; Dong M, Jiao G, Liu H, et al.Biological Silicon Stimulates Collagen Type 1 and Osteocalcin Synthesis inHuman Osteoblast-Like Cells Through the BMP-2 / Smad / RUNX2 Signaling Pathway[J]. Biological Trace Element Research, 2016, 173(2): 306-315.; Mladenović Ž,Johansson A, Willman B, et al. Soluble silica inhibits osteoclast formationand bone resorption in vitro[J]. Acta Biomaterialia, 2014, 10(1): 406-418.).After humans take silicate, it can combine with aluminum to form a stable aluminosilicate complex, reducing the content of free aluminum, thereby protecting brain nerve function and reducing the risk of AD (Domingo J L, Gómez M, Colomina M T. Oral silicon supplementation: an effective therapy for preventing oral aluminum absorption and retention in mammals[J]. Nutrition Reviews, 2011, 69(1): 41-51.; Reffitt D M, Jugdaohsingh R, Thompson R P, et al. Silicic acid: its gastrointestinal uptake and urinary excretion in man and effects on aluminum excretion[J]. Journal of Inorganic Biochemistry, 1999, 76(2): 141-147.); Potassium and sodium are both alkaline metals and play important roles in maintaining heart function, body fluid balance, muscle contraction, and nervous system function; The remaining trace elements may protect the body by maintaining the homeostasis of human trace elements and other pathways.Although trace elements are present in small amounts in the human body, they are widely involved in transporting macronutrients, enzymes, hormones, immune processes, regulating metabolic processes such as gut microbiota and protein synthesis, and are closely related to epigenetics, aging, and gene expression (Moksnes M R, Hansen AF, Wolford B N, et al. A genome-wide association study provides insights into the genetic etiology of 57 essential and non-essential trace elements in humans[J]. Communications Biology, 2024, 7: 432.; Himoto T, Masaki T. Current Trends on the Involvement of Zinc, Copper, and Selenium in the Process of Hepatocarcinogenesis[J]. Nutrients, 2024, 16(4): 472.; Cheng X, Wei Y, Wang R, et al. Associations of essential trace elements with epigenetic aging indicators and the potential mediating role of inflammation[J]. Redox Biology, 2023, 67: 102910.). In summary, the development and research of rubidium minerals have potential value, and the analysis of their structural components can provide certain assistance for promoting the development and utilization of rubidium ore resources.

[0056] The foregoing are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

[0057] The foregoing embodiments and methods described in the present invention may vary based on the capabilities, experience, and preferences of those skilled in the art.

[0058] The mere listing of the steps of the method in a certain order in the present invention does not constitute any limitation on the order of the method steps.

Claims

1. A method for detecting rubidium minerals, comprising the following steps: (1) Take the sample powder to be tested for XRD test and collect the XRD spectrum of the sample powder; (2) Perform phase analysis on the XRD spectrum, match the obtained diffraction data with the standard cards in the XRD-PDF card library, and obtain the phase analysis results; (3) Calibrate and peak-find the XRD spectrum, select the common characteristic peaks with strong intensity, and draw the XRD Fourier characteristic spectrum; (4) Compare the phase analysis results and XRD Fourier characteristic spectrum of the sample to be tested with the phase spectrum and XRD Fourier fingerprint spectrum of the rubidium mineral respectively; The XRD Fourier fingerprint spectrum of the rubidium mineral has characteristic peaks at 2θ angles of 13.82±0.04°; 20.92±0.02°; 22.49±0.49°; 23.47±0.43°; 23.49±0.03°; 24.23±0.03°; 25.48±0.04°; 26.34±0.02°; 27.35±0.01°; 27.85±0.01°; 29.35±0.01°; 30.08±0.02°; 30.77±0.37°; 34.93±0.01°; 41.74±0.02°; 42.49±0.07°; 50.46°; and 51.10±0.04°.

2. The method according to claim 1, characterized in that Step (3) also includes using software to calculate the 2θ, peak intensity I / I0 and lattice spacing d of each characteristic peak.

3. The method according to claim 1, characterized in that The XRD Fourier fingerprint spectrum of the rubidium mineral is shown in FIG4 ; Preferably, the comparison comprises comparing the characteristic peaks and 2θ angles, and lattice spacing of the XRD Fourier characteristic spectrum of the sample to be tested with the fingerprint spectrum.

4. The method according to claim 1, characterized in that In step (2), the substances analyzed include [Na 0.98 Ca 0.02 ][Al 1.02 Si 2.98 O8], Na[AlSi3O8], K[AlSi3]O8, Rb2O; Preferably, in step (4), the phase spectrum of the rubidium mineral is as shown in FIG3 .

5. The method according to claim 1, characterized in that The XRD test conditions include: the incident light source is Cu target Kα radiation, Ni sheet filtering, the X-ray tube working voltage is 40 kV, the current is 40 mA; the aperture system is DS=SS=1°; RS=0.3mm.

6. The method according to claim 1, characterized in that The XRD uses a continuous scanning mode; preferably, the scanning speed is 5° / min, the 2θ resolution is 0.02°, and the scanning range is 5-90°.

7. The method according to any one of claims 1 to 6, characterized in that: The method further comprises the step of preparing the powder of the sample to be tested: taking the sample to be tested, crushing it, and passing it through a 320-mesh sieve.

8. The method according to any one of claims 1 to 6, characterized in that: The method further comprises the step of performing inductively coupled plasma mass spectrometry multi-element chemical analysis on the sample to be tested.

9. The method according to any one of claims 1 to 6, characterized in that: The method further comprises the step of performing thermogravimetric analysis and / or infrared spectrum analysis on the sample to be tested.

10. Use of the method according to any one of claims 1 to 9 in the identification, quality control and evaluation of rubidium minerals.

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