CN113432945B - Device and method for preparing asbestos standard test piece for polarizing microscope - Google Patents
Device and method for preparing asbestos standard test piece for polarizing microscope Download PDFInfo
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- CN113432945B CN113432945B CN202110695759.6A CN202110695759A CN113432945B CN 113432945 B CN113432945 B CN 113432945B CN 202110695759 A CN202110695759 A CN 202110695759A CN 113432945 B CN113432945 B CN 113432945B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/2813—Producing thin layers of samples on a substrate, e.g. smearing, spinning-on
Abstract
The invention discloses a device and a method for preparing an asbestos standard test piece for a polarizing microscope. And corroding the corresponding area of the slide by using a polytetrafluoroethylene material corrosion device to prepare a corresponding fixed area, a corresponding impregnation area and a corresponding slide area. The prepared asbestos standard material solution is moved to a slide area for drying, neutral gum is dripped into a fixing area to fix the cover glass, the prepared standard test piece is not easy to fall off, and the safety of testers is guaranteed; the dipping solution can be dripped at any time in the using process, so that the optical properties such as the refractive index of the dipping solution are not changed, and the accuracy of the test result is further ensured. After the test is finished, the immersion liquid is sucked out, so that the standard asbestos test piece can be stored and reused next time, and the analysis and detection cost is reduced.
Description
Technical Field
The invention relates to an asbestos detection and test technology, in particular to a preparation process and a use method of an asbestos standard test piece for a polarizing microscope.
Background
Asbestos is a general term for various silicate-type minerals, belongs to an important mineral raw material, and is historically and now widely applied to the aspects of transportation, chemical engineering, construction, metallurgy and the like. The asbestos substances are particularly characterized by a fibrous structure and can be torn into a fine and tough fibrous substance. The asbestos substance mainly comprises two main types of serpentine asbestos (chrysotile) and hornblende asbestos (eublende, tremolite, actinolite, chrysotile, ferroasbestos and the like).
The asbestos material has excellent physical properties such as chemical corrosion resistance, heat preservation, insulation, wear resistance and the like, and can be processed into textiles for use. In the past, about 3000 or more products using asbestos as a main raw material have been examined from related literatures, and have been widely used in various aspects of production and life in relation to sound absorbing materials, heat insulating materials, friction materials, and the like in the past. Recent related researches show that when parts containing asbestos materials are broken and torn, fine asbestos fibers can form dust to contact human skin or enter human lungs along with respiratory systems, damage cells and bring continuous biological toxicity, and then respiratory diseases, lung diseases and cancers are caused. Thus, there are currently several tens of countries worldwide that have totally banned the import of asbestos and are gradually making technological updates and replacements of existing asbestos-containing products.
There are four main methods of testing for asbestos substances: infrared spectroscopy, powder X-ray diffraction, energy scanning electron microscopy, polarization microscopy, and the like. The corresponding international standard is ISO 22262-1-2012 air quality bulk material, part 1: the method comprises analysis methods such as quantitative determination and sampling of commercial asbestos bulk materials, ISO 22262-2-2014 air quality, quantitative determination of asbestos by using a gravimetric analysis and a microscope method, and the corresponding domestic standards comprise determination of asbestos in GB/T33395-2016 paint, determination of asbestos content in GBT 23263-2009 products, and the like. In both international and domestic standards, the polarized light microscope test is a key analysis method for analyzing asbestos substances.
In the process of testing by a polarizing microscope, experimenters need to make standard test pieces containing asbestos substances, observe the corresponding standard substances, and determine optical characteristics such as forms, colors, pleochromies, ductility symbols, extinction types, refractive indexes, dyeability and the like of different types of asbestos substances so as to confirm the types and the contents of the asbestos substances by reference. At present, the market price of the asbestos standard substances is about 20000 yuan/0.1 g, and the expensive price increases the burden of a detection mechanism and the cost of analyzing the asbestos substances.
The process of manufacturing the standard test piece for testing the polarizing microscope needs to use a glass slide, a cover glass, a dipping solution and a standard substance, and because the cover glass is movable, the cover glass is easy to fall off, so that asbestos substances are exposed in the air, and potential harm is further caused to the health of experimenters. The dipping solution has volatility, and the refractive index of the dipping solution can change until the dipping solution is completely dried along with the lapse of time, so that the optical characteristics of the manufactured test piece are changed to influence the judgment of a result; the natural volatilization of the impregnation liquid can also cause certain influence on the environment, thereby generating hidden health hazards to human bodies.
Disclosure of Invention
Aiming at the existing problems, the invention aims to provide a device and a method for preparing an asbestos standard test piece for a polarizing microscope, so as to solve the problem of safe fixation of asbestos standard substances, reduce the procurement cost of laboratory consumables and simplify the related test operation process.
The technical scheme adopted by the invention is as follows:
a preparation device of asbestos standard test piece for a polarizing microscope comprises a glass slide and a cover glass;
the upper surface of the glass slide is provided with two elongated corrosion areas and two semi-annular corrosion areas, wherein the two elongated corrosion areas are arranged in parallel, the two semi-annular corrosion areas are positioned between the two elongated corrosion areas, and the two semi-annular corrosion areas are oppositely arranged but are not connected with each other and form a circular area;
the cover glass covers the glass slide and is bonded and fixed in the two strip-shaped corrosion areas through fixing glue;
in an interlayer formed by the glass slide and the cover glass and arranged on the inner side of the bonding and fixing area, a circular area formed by the two semicircular corrosion areas is a glass slide area, an area outside the glass slide area is a dipping area, one end of the dipping area is provided with a dipping liquid inlet, and the other end of the dipping area is provided with a dipping liquid outlet.
Further, a corrosion area is prefabricated on the glass slide through a corrosion device, and the corrosion device is made of a polytetrafluoroethylene plate; two long-strip-shaped hollowed-out holes which are arranged in parallel are formed in the polytetrafluoroethylene plate, two semicircular hollowed-out holes which are symmetrical in opposite directions are formed in the area between the two long-strip-shaped hollowed-out holes, and a certain gap is separated between the two semicircular hollowed-out holes.
Further, two of the elongated etched regions are typically disposed along a side of the slide.
Furthermore, the glass slide and the cover glass are rectangular or square, and two side edges of the glass slide and the cover glass which are not fixedly bonded are aligned.
Further, the immersion fluid inlet and the immersion fluid outlet are formed by a gap between the glass slide and the cover glass.
A preparation method of an asbestos standard test piece for a polarizing microscope is realized by the following steps:
1) taking a glass slide, cleaning the surface of the glass slide by using clear water, and then drying the glass slide;
2) selecting a proper area on the upper surface of the glass slide, corroding two parallel strip-shaped corrosion areas and two semi-annular corrosion areas which are symmetrically arranged between the two strip-shaped corrosion areas in opposite directions, wherein a certain gap is separated between the two semi-annular corrosion areas, and cleaning the surface of the glass slide by using clean water after corrosion;
3) transferring 1-500 microliters of asbestos standard substance solution into an area surrounded by two semicircular corrosion areas on the surface of the glass slide, and then drying;
4) then, a certain amount of fixing glue is dripped into the two strip-shaped corrosion areas, and the glue amount is enough to completely cover the corrosion areas;
5) then, covering a cover glass, and bonding the cover glass by using a fixing glue;
6) drying and curing for 10-30 days to obtain the asbestos standard test piece.
Further, adopt a corrosion apparatus cover in slide upper surface corrosion apparatus is last to be seted up two parallel rectangular shape fretwork holes and to be located two semi-ring shape holes of symmetry in opposite directions between two rectangular shape fretwork holes, separates certain clearance between two semi-ring shape fretwork holes, is stained with clean brush and gets hydrofluoric acid, coats in all fretwork hole positions, makes slide upper surface is corroded in the fretwork region, corrodes 1 ~ 10 minutes after, takes off corrosion apparatus washs with clear water the slide surface.
Further, the cover glass is closely attached to the surface of the slide, and gaps are formed between the slide and the sides other than the adhesive side, and the gaps serve as immersion liquid inlets and outlets.
Further, the preparation method of the asbestos standard substance solution comprises the following steps: 0.001g to 0.01g of asbestos standard substance is taken to be matched with 10mL to 1000mL of dust-free pure water, and the mixture is fully shaken up and dispersed.
The application of standard asbestos test piece for polarizing microscope includes selecting certain soaking liquid, soaking the standard asbestos test piece, observing under polarizing microscope, sucking out the soaking liquid with water absorbing paper or fabric, and drying for next use.
Compared with the prior art, the invention has the beneficial effects that:
1. effectively reduce the analysis and test cost and improve the popularity of the relevant standards.
2. The hidden health trouble to the experimenter is eliminated to a great extent.
3. The test operation steps are simplified, and the test time is saved.
4. The manufacturing cost is low.
5. The result is stable and controllable, and the quality control level of the related experiment result is improved.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the invention.
Drawings
The drawings are only for purposes of illustrating particular embodiments and are not to be construed as limiting the invention, wherein like reference numerals are used to designate like parts throughout.
FIG. 1 is a schematic view of an asbestos gauge strip corrosion apparatus for a polarizing microscope according to the present invention.
FIG. 2 is a schematic plan view of a standard asbestos test piece for a polarizing microscope according to the present invention.
FIG. 3 is a schematic front view showing the structure of an asbestos standard test piece for a polarizing microscope according to the present invention.
FIG. 4 is a schematic illustration of etching a slide with an etching apparatus.
FIG. 5 is a schematic view of an etched slide.
Detailed Description
The invention will be described in detail hereinafter with reference to the accompanying drawings, which form a part hereof, and an embodiment, and which illustrate the invention together with the embodiment. However, it should be understood by those skilled in the art that the following examples are not intended to limit the scope of the present invention, and any equivalent changes or modifications made within the spirit of the present invention should be considered as falling within the scope of the present invention.
The invention provides a corrosion device for preparing an asbestos standard test piece, which is structurally shown in figure 1, and is prepared by adopting a polytetrafluoroethylene material, wherein a polytetrafluoroethylene plate is taken as a device body 11, an area with the length L1 and the width L2 is selected as a proper area in the middle of the device body 11, the proper area is matched with the length and the width of a cover glass used when the asbestos standard test piece is prepared, and L1 and L2 can be equal or different.
In the suitable area, two optionally symmetrical sides are respectively provided with an elongated hollow hole 12 along the edges, and the length of the elongated hollow hole 12 is determined by one side of the suitable area as the side length (depending on the chosen symmetrical side, as shown in fig. 1, it may be L1 or L2), and the width is L3.
Two semicircular hollow holes 13 which are symmetrical in opposite directions are formed in the area between the two strip-shaped hollow holes 12, the two semicircular hollow holes 13 are not communicated, and a certain gap is separated between the two semicircular hollow holes 13. An un-hollowed area 14 with the diameter of D is encircled inside the two semi-annular hollowed holes 13, and the un-hollowed area 14 corresponds to an area for placing an asbestos sample when the standard asbestos test piece is prepared. Because the two semicircular hollow holes 13 are not communicated, the polytetrafluoroethylene plates in the inner and outer areas of the hollow holes are connected into a whole, and the structural integrity is kept.
Therefore, two long-strip-shaped hollowed-out holes and two semi-annular hollowed-out holes are formed in one polytetrafluoroethylene plate, the plate surface is kept complete, the corrosion device is used as a mold and placed on a carrier, corrosive liquid or pigment and the like can be filled in the area of the long-strip-shaped hollowed-out holes 12 and the area of the semi-annular hollowed-out holes 13, and the shape or the pattern containing the two long-strip-shaped hollowed-out holes and the two semi-annular hollowed-out holes is formed in the carrier.
The invention also provides a device for preparing the asbestos standard test piece for the polarizing microscope, which comprises a glass slide 1 and a cover glass 2 as shown in figures 2 and 3.
The slide 1 is prepared in advance by applying the etching apparatus. The glass slide 1 is a glass carrier, the etching device is placed on the glass slide 1 before the test piece is prepared, as shown in fig. 4, hydrofluoric acid etching solution is injected into the strip-shaped hollow holes and the semi-annular hollow holes, so that two strip-shaped etching areas C1 and two semi-annular etching areas C2 are etched on the glass slide 1, the formed glass slide 1 is shown in fig. 5, the two strip-shaped etching areas C1 are arranged in parallel, and the two semi-annular etching areas C2 are located between the two strip-shaped etching areas, are arranged oppositely but are not connected, and form a circular area.
The cover glass 2 covers the upper surface of the glass slide 1, two areas are divided from the bottom of the cover glass 2, the size of the two areas is matched with two strip-shaped corrosion areas C1 corroded on the glass slide 1, and the two areas are divided and located on the edges of the two sides of the cover glass. Fixing glue is coated on the two strip-shaped corrosion areas C1, when the cover glass 2 is covered on the slide glass 1, the area coated with the fixing glue is just right for the cover glass 2 to be further fixed through the glue, and therefore a fixing area 3 is formed. Further, the fixing gum is a neutral gum.
Between the interlayer formed by the glass slide 1 and the cover glass 2, a circular area encircled by two semi-annular corrosion areas C2 is used as a glass slide area 4; the area between the two fixing areas 3 except the slide area 4 is called as a dipping area 5 for dipping the test solution, the dipping area 5 surrounds the slide area 4, and the test solution flows through the dipping area 5 and the slide area 4; and one end of the impregnation zone 5 is used as an impregnation liquid inlet 6, and the other end of the impregnation zone is used as an impregnation liquid outlet 7 along the extension direction of the two fixing zones 3. The semi-ring shape described herein is a small semi-ring.
The glass slide 1 is used as a carrier, and the fixed area 3, the slide area 4 and the dipping area 5 are sequentially loaded in a proper area on the glass slide 1.
The cover glass 2 covers the fixing area 3, the slide area 4 and the dipping area 5. The coverslip 2 is fixed to the slide 1 with neutral gum coated on the fixing area.
The fixing areas 3 are located on two side edges of the lower portion of the cover glass 2 and coated with fixing glue. Two fixing areas 3 are arranged on two sides of the dipping area 5, and the size of the dipping area 5 plus the size of the fixing areas 3 on two sides is equal to that of the cover glass 2. The fixing areas 3 on both sides are the same in size. The slide area 4 is positioned in the middle of the impregnation area 5 and is used for placing and observing a sample. The dipping solution inlet 6 and the dipping solution outlet 7 are arranged at two ends of the dipping area 5 and are formed by a crack of the glass slide 1 and the cover glass 2, and the test solution enters from the inlet and is sucked out through the outlet.
The invention also provides an asbestos standard test piece for the polarizing microscope, namely, an asbestos sample 8 is placed in the glass slide area 4 in the preparation device to form a standard test piece, the asbestos sample 8 is clamped and fixed with the cover glass 2 through the glass slide 1, and during the test, the asbestos sample enters the test solution through the impregnation solution inlet 6 to carry out related test observation, so that the asbestos sample is not required to be made every time and can be repeatedly used.
The invention also provides a preparation method of the asbestos standard test piece for the polarizing microscope, which is basically realized by the following steps:
1) taking a glass slide as a glass sheet, cleaning the surface of the glass slide by using clear water, and airing for later use.
2) The etching device is used for forming two symmetrical strip-shaped etching areas on the glass slide and two semi-annular etching areas which are symmetrical in opposite directions but not communicated between the two strip-shaped etching areas.
3) And after 1-10 minutes, taking down the corrosion device, and immediately cleaning the surface of the glass slide by using clear water.
4) After the surface of the glass slide is corroded, two semi-annular corrosion areas are enclosed into a glass slide area, 1-500 microliters of the asbestos standard substance solution is transferred to the glass slide area, a laboratory conventional device such as a microsyringe, an injector and the like can be used, then the asbestos standard substance solution is naturally dried, or is placed on a heating plate to be dried by distillation, or is dried by illumination or radiation, any one of the devices can be selected, the asbestos standard substance solution contains an asbestos sample, and the dried asbestos sample is left after drying.
5) And (3) dropping a certain amount of fixing glue into the two strip-shaped corrosion areas to form a fixing area, wherein the glue amount is enough to completely cover the corrosion areas, and the glue is only needed to be neutral.
6) Then cover the cover glass, compact, make the glue of the fixed area bond the cover glass, further, the glue of the fixed area bonds on both sides of the cover glass. The other two-sided slit where the slide glass and the cover glass are not bonded is configured as a dipping solution inlet 6 and a dipping solution outlet 7.
7) And then naturally airing for 10-30 days, or accelerating curing under the irradiation of light sources such as ultraviolet and the like, thereby preparing the asbestos standard test piece.
Use of the standard test strip:
during the test, a proper impregnation liquid is dripped into the impregnation liquid inlet 6 (dripping tools including a dropper, a syringe, a liquid filler, a stirring rod and the like), and due to the capillary action, the impregnation zone 5 is gradually filled with the test liquid and then enters the slide zone 4, and the asbestos sample is completely immersed in the test liquid. Due to the two semi-annular corrosion areas C2 corroded on the glass slide, the test solution in the glass slide area 4 can form surface tension to be gathered, the test solution does not flow out and spread, and the sample is effectively soaked.
The device is placed under the lens of a polarizing microscope, and relevant experimental observation is carried out on the slide area 4. After the experiment is finished, the water-absorbing paper or the fabric is placed at the immersion liquid outlet 7 to suck out the immersion liquid, and the immersion liquid can be dried by adopting a natural airing or heating drying method to finish the corresponding test work of the standard asbestos test piece.
Further: suitable asbestos standards include, but are not limited to, the following asbestos-like substances: serpentine asbestos (chrysotile), hornblende asbestos (eublende, tremolite, actinolite, chrysotile, ferroasbestos, etc.).
Further: the preparation method of the asbestos standard substance solution comprises the following steps: taking a proper amount (0.001 g-0.01 g) of asbestos standard substance, transferring the asbestos standard substance into a certain amount (10 mL-1000 mL) of dust-free pure water, violently shaking or dispersing by using ultrasonic waves, and then sucking 1-500 microliters of solution by using a dropper, a syringe, a liquid adding device, a stirring rod and the like for later use.
Description of the drawings: the impregnation liquid makes asbestos generate specific optical phenomena, different asbestos can show different colors in different impregnation liquids, and therefore the asbestos is identified, and the impregnation liquid used for different tests is different.
Example 1:
a serpentine asbestos (chrysotile) standard test piece for a polarizing microscope is prepared and used:
and taking the glass slide, cleaning the surface of the glass slide by using clear water, and then drying the glass slide. Selecting a suitable area and covering the corrosion device; and dipping a proper amount of hydrofluoric acid by using a clean brush, and coating the hydrofluoric acid on the hollow position of the corrosion device. After 5 minutes, the glass surface was observed to be corroded, the corrosion apparatus was removed, and the surface of the slide glass was immediately washed with clear water. The surface of the glass slide is corroded, and a fixed area, a dipping area and a glass slide area can be distinguished. 200 microlitres of asbestos standard substance solution is transferred to the slide area and naturally dried.
Dropping a certain amount of neutral gum on the fixing area, covering the cover glass and compacting. And then naturally airing for 30 days to prepare the serpentine asbestos (chrysotile) standard test piece.
An impregnating solution with a refractive index of 1.550 is used and is dripped into the impregnating solution inlet, because of capillary action, the impregnating solution gradually fills the impregnation area, and the serpentine asbestos (chrysotile) substance is completely impregnated in the impregnating solution. And placing the slide area under a lens of a polarizing microscope for carrying out relevant test observation. And after the experiment is finished, the impregnation liquid is dried by adopting a natural drying method, and the corresponding storage work of the serpentine asbestos (chrysotile) standard test piece is finished.
Example 2:
a method for preparing and using a standard test piece of hornblende asbestos (such as rectus amphibole, tremolite, actinolite, chrysotile and asbestos of iron) for a polarizing microscope comprises the following steps:
and taking a glass slide, cleaning the surface of the glass slide by using clear water, and then drying the glass slide. Selecting a proper area and covering the corrosion device; and dipping a proper amount of hydrofluoric acid by using a clean brush, and coating the hydrofluoric acid on the surface and the hollow position of the etching device. After 10 minutes, the etching apparatus was removed and the slide surface was immediately washed with clear water. And corroding the surface of the glass slide to form the fixed area, the impregnation area and the observation area. And transferring 500 microliters of the asbestos standard substance solution to the slide area, and airing by illumination. A certain amount of neutral gum is dripped on the fixed area 3, covered with the cover glass and compacted. And then accelerated curing under illumination to prepare the hornblende asbestos (directly blende, tremolite, actinolite, chrysotile, ferroasbestos and the like) standard test piece.
The impregnation liquid is added dropwise to the impregnation liquid inlet, and because of the capillary action, the impregnation liquid gradually fills the impregnation zone and the asbestos substances are completely impregnated in the impregnation liquid. And (5) placing the slide area under the lens of a polarization microscopic device, and carrying out related experimental observation. After the experiment is finished, water-absorbing paper is placed at the steeping liquor outlet to suck out the steeping liquor. And finishing the corresponding storage work of the asbestos standard test piece.
Claims (10)
1. The preparation device of the asbestos standard test piece for the polarizing microscope is characterized in that: comprises a glass slide and a cover glass;
the upper surface of the glass slide is provided with two elongated corrosion areas and two semi-annular corrosion areas, wherein the two elongated corrosion areas are arranged in parallel, the two semi-annular corrosion areas are positioned between the two elongated corrosion areas, and the two semi-annular corrosion areas are oppositely arranged but not connected and form a circular area;
the cover glass covers the glass slide and is bonded and fixed in the two strip-shaped corrosion areas through fixing glue;
in an interlayer formed by the glass slide and the cover glass and arranged on the inner side of the bonding and fixing area, a circular area formed by the two semicircular corrosion areas is a glass slide area, an area outside the glass slide area is a dipping area, one end of the dipping area is provided with a dipping liquid inlet, and the other end of the dipping area is provided with a dipping liquid outlet.
2. The apparatus for preparing an asbestos standard test piece for a polarizing microscope according to claim 1, wherein: the glass slide is prefabricated with a corrosion area through a corrosion device, and the corrosion device is made of a polytetrafluoroethylene plate; two strip-shaped hollowed holes which are arranged in parallel are formed in the polytetrafluoroethylene plate, two semicircular hollowed holes which are symmetrical in opposite directions are formed in the area between the two strip-shaped hollowed holes, and a certain gap is separated between the two semicircular hollowed holes.
3. The apparatus for preparing an asbestos standard test piece for a polarizing microscope according to claim 1, wherein: two of the elongated erosion zones are typically disposed along one side of the slide.
4. The apparatus for preparing an asbestos standard test piece for a polarizing microscope according to claim 1, wherein: the glass slide and the cover glass are rectangular or square, and two side edges of the glass slide and the cover glass which are not fixedly bonded are aligned.
5. The apparatus for preparing an asbestos standard test piece for a polarizing microscope according to claim 1, wherein: the immersion fluid inlet and the immersion fluid outlet are formed by a crack of the glass slide and the cover glass.
6. A preparation method of an asbestos standard test piece for a polarizing microscope is characterized by comprising the following steps:
1) taking a glass slide, cleaning the surface of the glass slide by using clear water, and then drying the glass slide;
2) selecting a proper area on the upper surface of the glass slide, corroding two parallel long strip-shaped corrosion areas and two semi-annular corrosion areas which are symmetrically arranged between the two long strip-shaped corrosion areas in opposite directions, wherein a certain gap is separated between the two semi-annular corrosion areas, and cleaning the surface of the glass slide by using clean water after corrosion;
3) transferring 1-500 microliters of asbestos standard substance solution into an area surrounded by two semicircular corrosion areas on the surface of the glass slide, and then drying;
4) then dripping a certain amount of fixing glue into the two strip-shaped corrosion areas, wherein the glue amount is enough to completely cover the strip-shaped corrosion areas;
5) then, covering a cover glass, and bonding the cover glass by using a fixing glue;
6) drying and curing for 10-30 days to obtain the standard asbestos test piece.
7. The method according to claim 6, characterized in that a corrosion device is adopted to cover the upper surface of the glass slide, two parallel long-strip-shaped hollow holes and two semi-ring-shaped holes which are symmetrically arranged between the two long-strip-shaped hollow holes in opposite directions are formed in the corrosion device, a certain gap is separated between the two semi-ring-shaped hollow holes,
dipping hydrofluoric acid with a clean brush, coating the hydrofluoric acid on all the positions of the hollow holes to corrode the upper surface of the glass slide in the hollow area,
and after corroding for 1-10 minutes, taking down the corrosion device, and cleaning the surface of the glass slide by using clear water.
8. The method of claim 6, wherein the cover glass is closely attached to the slide surface, and gaps are formed between the slide surface and both sides of the cover glass except the adhesive side to serve as the inlet and outlet for the immersion fluid.
9. The method according to claim 6, characterized in that the asbestos standard substance solution is prepared by: 0.001g to 0.01g of asbestos standard substance is taken to be matched with 10mL to 1000mL of dust-free pure water, and the mixture is fully shaken up and dispersed.
10. Use of an asbestos standard test piece for a polarizing microscope, characterized in that an immersion liquid is selected, the asbestos standard test piece prepared by the method according to any one of claims 6 to 9 is immersed, the asbestos standard test piece is observed under a polarizing microscope, after the test, the immersion liquid is sucked out by using absorbent paper or fabric, and the asbestos standard test piece is dried for the next use.
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| CA2416360A1 (en) * | 1997-03-21 | 1998-10-01 | Northern Edge Associates Inc. | Microscope slide system and method of use |
| CN106392459A (en) * | 2016-10-18 | 2017-02-15 | 西安航空制动科技有限公司 | Method for correcting deformation of aluminum alloy half snap ring through prestress shot peening |
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