CN114295632A - Method for detecting pollutants on surface of waste plastic - Google Patents
Method for detecting pollutants on surface of waste plastic Download PDFInfo
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Abstract
The invention provides a method for detecting pollutants on the surface of waste plastic, and relates to the technical field of pollutant detection and analysis. The detection method of the surface pollutants of the waste and impurity plastics provided by the invention analyzes the surface pollutants of the waste and impurity plastics by using a conventional analysis and detection equipment combination, has important guiding significance on the cleaning and washing steps involved in the recycling process of the waste and impurity plastics, can perform systematic component analysis on solid, liquid, oily substances and the like possibly existing in the surface pollutants of the waste and impurity recycled materials at the same time, has broad spectrum and high analysis efficiency, plays an important role in recycling of the waste and impurity plastics, and also has applicability to foreign matter analysis.
Description
Technical Field
The invention relates to the technical field of pollutant detection and analysis, in particular to a method for detecting pollutants on the surface of waste plastic.
Background
The plastic can be recovered by mechanical, physical or chemical recovery methods. No matter which recovery mode is used, the waste and impurity plastic needs to be sorted and cleaned, and the components of the pollutants on the surface of the waste and impurity plastic play an important role in recycling the waste and impurity plastic. The loose dirt (such as sand and mud) on the surface of the waste plastic can be generally treated by precipitation after mechanical stirring, but the cleaning effect of oily and other non-aqueous surface pollutants depends on the type of a proper selected cleaning agent, and the selection and the development of the waste plastic cleaning agent are premised on relatively full and complete recognition of the pollutants on the surface of the waste plastic. The waste plastics are mainly plastic films, plastic woven products, foamed plastics, plastic packing cases, plastic bottles, plastic containers, plastic bags, agricultural mulching films and the like. The pollutants on the surface of the waste plastic comprise organic matters and inorganic matters, and the pollutants can be subdivided into food residues, daily chemical residues, ash dirt, adhesives and the like. Therefore, the identification and analysis of the surface contaminants of the waste plastics play an important role in the development and selection of a high-quality detergent.
There is no systematic analysis report and research for the surface contamination of waste plastics. Patent CN 112557431 a discloses a nondestructive testing method for pollutant components on the surface of a component, which is simply to use conductive adhesive to adhere a sample preparation test EDS, and the obtained result is only an element, and has no great significance for analyzing specific components of the substance. The literature, "analysis of surface pollutants of waste parts and green cleaning technology" mainly performs simple infrared and optical microscopy and energy spectrum analysis on the surface pollutants of the waste parts of the engineering machinery, mainly performs simple component analysis on primer, finish paint, oil stains and rust stains, the engineering machinery parts are all metal, and the analysis of the surface pollutants of which the matrix is plastic is not involved. The literature, namely the analytical research on condensable pollutants on the surface of a sensitive device, only uses GC-MS to carry out component analysis on the condensable pollutants in a specific scene, and the condensable pollutants belong to volatile substances, and the analytical chip has no universality. The documents "experimental analysis research on surface pollutants of materials" and "application research on surface pollutants analysis by thermal desorption mass spectrometry" mainly aim at performing mass spectrometry on surface pollutants in a vacuum environment, and are also limited in application.
Disclosure of Invention
In order to solve the problems in the prior art, the invention mainly aims to provide a method for detecting surface pollutants of waste plastic.
In order to achieve the above object, in a first aspect, the present invention provides a method for detecting contaminants on a surface of waste plastics, comprising the following steps:
(1) taking pollutants adhered to the surface of the waste plastic body as an object to be detected, collecting an infrared spectrogram of the object to be detected, and acquiring a first analysis result corresponding to the object to be detected according to the infrared spectrogram;
(2) collecting a pyrolysis gas chromatography-mass spectrogram of the object to be detected, and acquiring a second analysis result corresponding to the object to be detected according to the pyrolysis gas chromatography-mass spectrogram;
(3) selecting an analysis solvent capable of dissolving the object to be detected according to the first analysis result and the second analysis result, dissolving the object to be detected in the analysis solvent, and collecting a treatment solution;
(4) performing component analysis on the treatment solution to obtain a third analysis result;
(5) and determining the chemical components of the substance to be detected according to the first analysis result, the second analysis result and the third analysis result.
In the technical scheme of the invention, a microscopic infrared spectrometer is adopted to collect an infrared spectrogram in the step (1), a pyrolysis gas chromatography-mass spectrometer (PYGC-MS) is adopted to collect a pyrolysis gas chromatography-mass spectrogram in the step (2), and the pyrolysis temperature is generally set to be 560-600 ℃ and the pyrolysis time is 0.2-0.4min in the process of collecting the pyrolysis gas chromatography-mass spectrogram, so that the polymer is fully fragmented. Preliminarily analyzing the components of the substance to be detected according to the acquired infrared spectrogram and the cracked gas chromatography-mass spectrogram, determining an analysis solvent capable of dissolving the substance to be detected, dissolving the substance to be detected in the analysis solvent to extract a treatment solution, further analyzing the components of the treatment solution to obtain a third analysis result, and finally determining the chemical components of the substance to be detected by integrating the infrared spectrogram analysis result (namely, the first analysis result) in the step (1) and the cracked gas chromatography-mass spectrogram analysis result (namely, the second analysis result) in the step (2).
The invention analyzes the pollutants on the surface of the waste plastic by using the conventional analysis and detection equipment combination, has important guiding significance on the cleaning and washing steps involved in the recycling process of the waste plastic, can perform systematic component analysis on solid, liquid, oily substances and the like possibly existing in the pollutants on the surface of the waste plastic recycling material, has broad spectrum and high analysis efficiency, plays an important role in recycling the waste plastic, and also has applicability to foreign matter analysis.
As a preferred embodiment of the method for detecting surface contaminants on waste plastics according to the present invention, the substance to be detected in step (1) is classified into liquid contaminants and solid contaminants according to their properties.
In the technical scheme of the invention, the pollutants on the surface of the waste plastic (namely the object to be detected) are mainly divided into the following types according to different properties: (1) liquid contaminants, i.e., contaminants that are themselves liquid or oily; and (2) solid pollutants, including solid organic pollutants and solid inorganic pollutants, which are mainly granular and/or powdery. It should be noted that solid contaminants generally include both organic contaminants and inorganic contaminants, as well as different solid contaminants, wherein the organic contaminants and the inorganic contaminants are contained in different compositions and proportions.
As a preferred embodiment of the method for detecting surface contaminants on waste plastics, the step (1) of collecting the infrared spectrogram of the object to be detected specifically comprises the following steps:
classifying and sampling the object to be detected according to object properties to obtain a sample to be detected, and respectively acquiring infrared spectrograms corresponding to the sample to be detected by using a microscopic infrared spectrometer, wherein the microscopic infrared spectrometer uses an MCT detector, and the scanning wave number is 675-4000cm-1Resolution of 4cm-1The number of scans was 32.
Because the properties of the objects to be detected are different, the samples to be detected need to be classified and prepared before the infrared spectrogram is collected, so that the samples to be detected are obtained, and then the samples to be detected are submitted for detection. Wherein, the liquid pollutant can be directly applied to a liquid film method, and the liquid pollutant is smeared on the transmission hole position of KBr on the multi-hole position silver mirror plate by using a spatula to test the infrared spectrogram. The solid pollutants can be rolled and sampled by a roller of a sample preparation hob and then placed on a multi-hole silver mirror disc reflection hole position to test an infrared spectrogram of the solid pollutants.
Further, if the object to be detected is a solid pollutant, the preparation method of the sample to be detected comprises the following steps:
and (3) adopting tinfoil or aluminum foil as the isolation paper, placing the object to be detected between the two layers of isolation paper, and rolling by using a roller of a sample-making hob cutter to obtain the sample to be detected.
As mentioned above, for solid pollutants, the roller of the sample preparation hob is adopted to roll the solid substances so as to meet the requirements of the gold mirror reflection method on the detection samples. However, in the conventional method for rolling solid substances by using a roller of a sampling hob, the problem that the solid substances are transferred and adhered to the surface of the roller frequently occurs. In contrast, the present invention uses tin foil or aluminum foil as the isolation paper, as shown in fig. 1, the object to be detected (i.e. solid contaminants) is placed between two layers of isolation paper, so that the isolation paper completely covers or wraps the object to be detected, and then the object is rolled by the roller of the sample-making hob-cutter. By adopting the method, the object to be detected can be prevented from being adhered to the roller, solid hard foreign matters can be prevented from splashing, and the pressed sample to be detected can be directly transferred to the multi-hole silver mirror disc reflection hole position for testing.
Further, the step of respectively acquiring the infrared spectrograms corresponding to the samples to be detected specifically comprises:
and placing the sample to be detected in a reflection hole position or a transmission hole position of the annular porous silver mirror disc, and collecting an infrared spectrogram of the sample to be detected.
As a preferred embodiment of the method for detecting surface contaminants on waste plastics according to the present invention, the analysis solvent in step (3) includes at least one of water, ethanol, acetone, toluene, chloroform, and tetrahydrofuran.
In the technical scheme of the invention, the analysis solvent is selected according to whether the analysis solvent can dissolve the substance to be detected. For example, if the chemical components of the substance to be detected are preliminarily determined to be fatty acid ester substances through the infrared spectrogram analysis result of the step (1) and the cracking gas chromatography-mass spectrogram analysis result of the step (2), ethanol capable of dissolving fatty acid esters can be selected as the analysis solvent.
It should be noted that, in most cases, the chemical components of the substance to be detected preliminarily determined by the infrared spectrogram analysis result of step (1) and the pyrolysis gas chromatography-mass spectrometry spectrogram analysis result of step (2) are more, and the chemical properties of the components are also different, and at least one solvent can be determined according to the preliminary analysis result, and the corresponding chemical components in the substance to be detected are respectively dissolved for subsequent analysis.
As a preferred embodiment of the method for detecting surface contaminants on waste plastics, the step (4) of analyzing the components of the treatment solution specifically includes the following steps:
performing GC-MS and/or LC-MS analysis on the treatment solution;
and/or concentrating the treatment solution and then performing PYGC-MS analysis;
and/or after removing the solvent in the treatment solution, performing infrared spectroscopy.
In the technical scheme of the invention, the treatment solution can be directly analyzed by a gas chromatography-mass spectrometer (GC-MS) and/or a liquid chromatography-mass spectrometer (LC-MS); on the basis, the treatment solution can be further concentrated and then subjected to PYGC-MS analysis; further, it is also possible to optionally take out the solvent in the treatment solution and perform infrared spectroscopic analysis again. The sequence of the three-step analysis can be adjusted and selected according to actual conditions.
In a second aspect, the invention further provides an annular porous silver mirror disc, wherein the annular porous silver mirror disc is provided with a plurality of reflection hole sites, a plurality of transmission hole sites and a handle for controlling the annular porous silver mirror disc to rotate around a central shaft, the distances between the plurality of reflection hole sites and the central shaft are equal, and the distances between the plurality of transmission hole sites and the central shaft are equal.
When an infrared spectrogram is collected, a conventionally used diamond pressure cell belongs to a single-flux sample preparation method, only one foreign object point can be prepared each time, and a sample is prepared again after cleaning after testing, so that the efficiency is low.
In the technical scheme of the invention, the newly designed annular multi-hole position silver mirror disk is used for high-throughput testing, so that multi-point acquisition of infrared spectrograms can be realized, and the testing efficiency is improved. The structure of the annular porous silver mirror disk of the invention is shown in figure 2. The annular porous silver mirror disc is provided with a plurality of reflection hole sites (2), a plurality of transmission hole sites (3) and a handle (1) used for controlling the annular porous silver mirror disc to rotate around a central shaft (4), the distance between the plurality of reflection hole sites (2) and the central shaft (4) is equal, and the distance between the plurality of transmission hole sites and the central shaft is equal.
As a preferred embodiment of the annular porous silver mirror disk of the present invention, the reflection hole site and/or the transmission hole site are detachable.
As a preferred embodiment of the annular porous silver mirror disk of the present invention, a distance between the reflection hole site and the central axis is greater than a distance between the transmission hole site and the central axis.
Compared with the prior art, the invention has the beneficial effects that:
the technical scheme of the invention analyzes the pollutants on the surface of the waste plastic by using the conventional analysis and detection equipment combination, has important guiding significance on the cleaning and washing steps involved in the recycling process of the waste plastic, can perform systematic component analysis on solid, liquid, oily substances and the like possibly existing in the pollutants on the surface of the waste and impurity recycled material, has broad spectrum and high analysis efficiency, plays an important role in recycling the waste plastic, and also has applicability to foreign matter analysis.
Drawings
FIG. 1 is a schematic diagram of the position relationship between an object to be detected and release paper in a sample preparation process according to the present invention;
FIG. 2 is a schematic view of the structure of an annular porous silver mirror plate of the present invention;
FIG. 3 is a PYGC-MS spectrum of example 1 of the present invention;
FIG. 4 is a GC-MS spectrum of example 1 of the present invention;
FIG. 5 is an infrared spectrum of example 1 of the present invention;
FIG. 6 is an infrared spectrum of powder 1 in example 2 of the present invention;
FIG. 7 is an infrared spectrum of powder 2 and powder 3 in example 2 of the present invention;
FIG. 8 is an infrared spectrum of powder 4 in example 2 of the present invention;
FIG. 9 is a GC-MS spectrum measured in step (4) of example 2 of the present invention;
FIG. 10 is a graph showing an infrared spectrum measured in step (6) of example 2 of the present invention;
wherein the reference numerals of fig. 2 are: 1-handle, 2-reflection hole site, 3-transmission hole site, and 4-central axis.
Detailed Description
To better illustrate the objects, aspects and advantages of the present invention, the present invention will be further described with reference to the following specific examples.
The apparatus adopted in the embodiment of the invention is as follows:
a microscopic infrared spectrometer: model number Nicolet IN10, purchased from semer fly;
cracked gas chromatography-mass spectrometer (PyGC-MS): the model is TSQ 7000, purchased from Saimei Fei;
gas chromatography-mass spectrometer (GC-MS): model 7890B-5977B, available from Agilent;
liquid chromatography-mass spectrometer (LC-MS): model number Waters BEH Quattro Premier XE, available from Waters corporation, USA.
When an infrared spectrogram is collected, an annular porous silver mirror plate is adopted for carrying samples, and the structure of the annular porous silver mirror plate is shown in figure 2. The annular porous silver mirror disc is provided with a plurality of reflection hole sites (2), a plurality of transmission hole sites (3) and a handle (1) used for controlling the annular porous silver mirror disc to rotate around a central shaft (4), the distance between the plurality of reflection hole sites (2) and the central shaft (4) is equal, and the distance between the plurality of transmission hole sites (3) and the central shaft (4) is equal. The reflection hole site (2) and/or the transmission hole site (3) can be detached, and the distance between the reflection hole site (2) and the central axis is larger than the distance between the transmission hole site (3) and the central axis (4).
Example 1 (analysis of contaminants on the surface of baby haha AD calcium milk bottle)
The detection method of the embodiment comprises the following steps:
(1) taking oily pollutants with different colors adhered to the surface of a Tyvehaha AD calcium milk bottle as samples to be detected, respectively coating the samples to be detected on transmission hole sites of an annular porous silver mirror plate, collecting an infrared spectrogram of the samples to be detected by using a microscopic infrared spectrometer, and analyzing the infrared spectrogram to obtain that the samples to be detected are mainly fatty acid ester substances;
(2) collecting a cracked gas chromatography-mass spectrogram of a sample to be detected, wherein the cracking temperature is 560 ℃, the cracking time is 0.2min, the cracked gas chromatography-mass spectrogram is shown as 3, and the main components obtained by analysis of the cracked gas chromatography-mass spectrogram are 1-methyl-4-cyclohexanol, 5-methylfuran aldehyde flavoring agent, ethylene glycol laurate, laureth, glyceryl trioleate, alkanol, ethylene glycol tetradecyl ether, 5-hydroxymethylfurfural and methyl palmitate;
(3) the fatty acid ester is generally dissolved in ethanol, the ethanol is used as an analysis solvent, the ethanol is used for leaching foreign matters on the surface of the Wahaha AD calcium milk bottle, and leacheate is collected to be used as a treatment solution;
(4) taking part of the treatment solution to perform GC-MS analysis, wherein the GC-MS analysis adopts the following conditions: DB-5MS (30m × 250 μm × 0.25 μm), with an injection port temperature of 280 deg.C, a temperature raising program of maintaining at an initial temperature of 90 deg.C for 3min, raising the temperature to 320 deg.C at a temperature raising rate of 20 deg.C/min for 5min, and a GC-MS spectrogram as shown in FIG. 4; the main components analyzed from fig. 4 were linoleic acid, glycidyl oleate, ethyl palmitate, dodecanol, palmitic acid (i.e., palmitic acid), oleic acid monoglyceride, etc.; and (3) removing the solvent from the rest of the treatment solution, and performing infrared spectrum analysis, wherein the infrared spectrum is shown as figure 5, and the main component of the sample obtained by analysis of figure 5 is castor oil.
(5) According to the analysis results of the steps (1) to (4), the main components of the contaminants on the surface of the Tyvehaha AD calcium milk bottle are fatty acid ester, 1-methyl-4-cyclohexanol, linoleic acid, castor oil, 5-methylfuran aldehyde flavoring agent, polyethylene glycol laurate, laureth, glycerol trioleate, alkane alcohol (including cetyl alcohol and dodecanol), ethylene glycol tetradecyl ether, 5-hydroxymethyl furfural, methyl palmitate, ethyl palmitate, glycidyl oleate and palmitic acid.
Example 2 (analysis of solid powder adhered to the surface of waste Plastic bottle)
The detection method of the embodiment comprises the following steps:
(1) taking solids with different particle sizes and colors adhered to the surface of a waste plastic bottle as an object to be detected, rolling the object to be detected by a sample preparation tool hob using tinfoil to obtain a sample to be detected (comprising powder 1, powder 2, powder 3 and powder 4), respectively transferring the sample to be detected to reflection hole positions of an annular porous silver mirror disc, and collecting an infrared spectrogram of the sample to be detected by using a microscopic infrared spectrometer (the infrared spectrogram of the powder 1 is shown in figure 6, the infrared spectrograms of the powder 2 and the powder 3 are shown in figure 7, and the infrared spectrogram of the powder 4 is shown in figure 8), wherein the microscopic infrared spectrometer uses an MCT detector, and the scanning wave number is 675-4000cm-1Resolution of 4cm-1The number of scanning times is 32; the main components of powder 1 analyzed from fig. 6 were kaolin and polyester, the main components of powder 2 and powder 3 analyzed from fig. 7 were mica and calcium carbonate, and the main component of powder 4 analyzed from fig. 8 was quartz;
(2) mixing the powder 1, the powder 2, the powder 3 and the powder 4, adopting a PYGC-MS single-point method, wherein the cracking temperature is 560 ℃, the cracking time is 0.2min, collecting a cracking gas chromatography-mass spectrogram of the mixture, and analyzing the cracking gas chromatography-mass spectrogram to obtain main characteristic fragments of styrene, oleic acid, methyl palmitate and glycerol trioleate;
(3) ethanol and toluene are used as analysis solvents, solid powder taken from the surface of a waste plastic bottle is extracted by ethanol, and leacheate is collected to be used as treatment liquid 1;
(4) the treatment solution 1 was subjected to GC-MS analysis under the following conditions: DB-5MS (30m is multiplied by 250 μm is multiplied by 0.25 μm), the injection port temperature is 280 ℃, the temperature rising program is to keep 3min at the initial temperature of 90 ℃, the temperature is raised to 320 ℃ according to the temperature rising rate of 20 ℃/min and kept for 5min, the GC-MS spectrogram is shown in figure 9, and the main components are ethyl oleate, palmitic acid and ethyl palmitate which are analyzed by the figure 9;
(5) extracting the residue after ethanol extraction with toluene, and collecting eluate as treatment solution 2;
(6) removing the solvent in the treating solution 2, and performing infrared spectrum analysis, wherein the infrared spectrum is shown as 10, and the main components of the treating solution are polyethylene glycol monolaurate and unsaturated polyester obtained by analysis in the infrared spectrum shown as 10;
(7) and (3) combining the analysis results of the steps (1) to (6), determining that the main components of the solid powder adhered to the surface of the waste plastic bottle are kaolin, unsaturated polyester, calcium carbonate, mica, quartz, polyethylene glycol monolaurate, oleic acid, methyl palmitate, glycerol trioleate, ethyl oleate and palmitic acid.
Example 3 (analysis of solid contaminants adhered to the crumble Material of washing machine case)
The detection method of the embodiment comprises the following steps:
(1) taking solid pollutants with different particle sizes and colors adhered to the surface of a broken material of a washing machine shell as an object to be detected, rolling the object to be detected by a sample preparation tool hob cutter by using tinfoil to obtain a sample to be detected, respectively transferring the sample to be detected to reflection hole positions of an annular porous silver mirror disc, and collecting an infrared spectrogram of the sample to be detected by using a microscopic infrared spectrometer, wherein the microscopic infrared spectrometer uses an MCT detector, and the scanning wave number is 675--1Resolution of 4cm-1The number of scanning times is 32, and the main components of the sample to be detected are PP, talcum powder, ABS andaluminum silicate;
(2) mixing samples to be detected, adopting a PYGC-MS double-point method, wherein the cracking temperature is 560 ℃, the cracking time is 0.2min, collecting a cracking gas chromatography-mass spectrogram of the mixture, and analyzing the cracking gas chromatography-mass spectrogram to obtain main characteristic fragments of styrene, methyl methacrylate, stearic acid and cellulose;
(3) adopting acetone as an analysis solvent, leaching solid pollutants adhered to the surface of the broken material of the washing machine shell by adopting the acetone, and collecting leacheate as treatment liquid;
(4) and performing GC-MS analysis on the treatment solution, wherein the GC-MS analysis adopts the following conditions: DB-5MS (30m is multiplied by 250 mu m is multiplied by 0.25 mu m), the injection port temperature is 280 ℃, the temperature rising program is to keep 3min at the initial temperature of 90 ℃, the temperature is raised to 320 ℃ according to the temperature rising speed of 20 ℃/min and kept for 5min, and the main components are hindered phenol antioxidant, methyl methacrylate and fatty acid methyl ester through GC-MS spectrogram analysis;
(5) and (3) combining the analysis results of the steps (1) to (4), determining that the main components of the solid pollutants adhered to the surface of the broken material of the washing machine shell are PP, talcum powder, ABS, aluminum silicate, polyacrylate (a product deduced from the characteristic fragment of methyl methacrylate), hindered phenol antioxidant, fatty acid methyl ester and cellulose.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the protection scope of the present invention, and although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Claims (10)
1. A detection method for the surface pollutants of waste plastics is characterized by comprising the following steps:
(1) taking pollutants adhered to the surface of the waste plastic body as an object to be detected, collecting an infrared spectrogram of the object to be detected, and acquiring a first analysis result corresponding to the object to be detected according to the infrared spectrogram;
(2) collecting a pyrolysis gas chromatography-mass spectrogram of the object to be detected, and acquiring a second analysis result corresponding to the object to be detected according to the pyrolysis gas chromatography-mass spectrogram;
(3) selecting an analysis solvent capable of dissolving the object to be detected according to the first analysis result and the second analysis result, dissolving the object to be detected in the analysis solvent, and collecting a treatment solution;
(4) performing component analysis on the treatment solution to obtain a third analysis result;
(5) and determining the chemical components of the substance to be detected according to the first analysis result, the second analysis result and the third analysis result.
2. The method for detecting contaminants on the surface of waste plastics according to claim 1, wherein the substances to be detected in the step (1) are classified into liquid contaminants and solid contaminants according to their properties.
3. The method for detecting the surface contaminants of the waste plastics as claimed in claim 1 or 2, wherein the step (1) of collecting the infrared spectrogram of the object to be detected specifically comprises the following steps:
classifying and sampling the object to be detected according to object properties to obtain a sample to be detected, and respectively acquiring infrared spectrograms corresponding to the sample to be detected by using a microscopic infrared spectrometer, wherein the microscopic infrared spectrometer uses an MCT detector, and the scanning wave number is 675-4000cm-1Resolution of 4cm-1The number of scans was 32.
4. The method for detecting contaminants on the surface of waste plastics according to claim 3, wherein if the substance to be detected is a solid contaminant, the method for preparing the sample to be detected comprises the following steps:
and (3) adopting tinfoil or aluminum foil as the isolation paper, placing the object to be detected between the two layers of isolation paper, and rolling by using a roller of a sample-making hob cutter to obtain the sample to be detected.
5. The method for detecting contaminants on the surface of waste plastics according to claim 3, wherein the step of respectively acquiring the infrared spectrograms corresponding to the samples to be detected specifically comprises:
and placing the sample to be detected in a reflection hole position or a transmission hole position of the annular porous silver mirror disc, and collecting an infrared spectrogram of the sample to be detected.
6. The method for detecting contaminants on the surface of waste plastics according to claim 1, wherein the analysis solvent in the step (3) comprises at least one of water, ethanol, acetone, toluene, chloroform, and tetrahydrofuran.
7. The method for detecting contaminants on the surface of waste plastics according to claim 1, wherein the step (4) of analyzing the composition of the treatment solution specifically comprises the steps of:
performing GC-MS and/or LC-MS analysis on the treatment solution;
and/or concentrating the treatment solution and then performing PYGC-MS analysis;
and/or after removing the solvent in the treatment solution, performing infrared spectroscopy.
8. The annular multi-hole silver mirror plate of claim 5, wherein a plurality of reflection hole sites, a plurality of transmission hole sites and a handle for controlling the annular multi-hole silver mirror plate to rotate around a central shaft are arranged on the annular multi-hole silver mirror plate, the plurality of reflection hole sites are equidistant from the central shaft, and the plurality of transmission hole sites are equidistant from the central shaft.
9. The annular multi-aperture silver mirror disk of claim 8, wherein the reflective aperture site and/or the transmissive aperture site are removable.
10. The annular multi-aperture silver mirror disk of claim 8, wherein the reflective aperture site is spaced further from the central axis than the transmissive aperture site.
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| CN115452772A (en) * | 2022-09-06 | 2022-12-09 | 胜科纳米(苏州)股份有限公司 | Method for detecting adsorbate on surface of LCD screen |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202305304U (en) * | 2011-10-28 | 2012-07-04 | 长沙开元仪器股份有限公司 | Elemental analyser and lofting mechanism thereof |
| CN102564816A (en) * | 2010-12-23 | 2012-07-11 | 中国石油化工股份有限公司 | Sample preparation method of viscous solid matter and one-hole sample preparation mold used by same |
| CN204666427U (en) * | 2015-01-27 | 2015-09-23 | 长沙瑞翔科技有限公司 | Load sample mechanism and water ash content proving installation |
| CN206074440U (en) * | 2016-09-30 | 2017-04-05 | 中南林业科技大学 | A kind of near infrared spectrum automatic on-line detection means |
| CN108254330A (en) * | 2017-12-20 | 2018-07-06 | 苏州禾川化学技术服务有限公司 | A kind of chemical analysis method of neoprene/viscose rayon |
| CN109781654A (en) * | 2019-03-12 | 2019-05-21 | 苏州协鑫光伏科技有限公司 | The detection method that silicon chip surface stains |
| CN110286100A (en) * | 2019-07-08 | 2019-09-27 | 中国科学技术大学 | Infrared external reflection and transmission measurement system and method |
| CN209764717U (en) * | 2019-03-18 | 2019-12-10 | 山东金璋隆祥智能科技有限责任公司 | Miniature near-infrared spectrometer transflectance survey appearance device |
| CN210154992U (en) * | 2019-05-21 | 2020-03-17 | 中国农业大学 | Diffuse transmission and diffuse reflection spectrum acquisition device |
| CN113686805A (en) * | 2021-08-23 | 2021-11-23 | 上海烟草集团有限责任公司 | Oil product characteristic fingerprint spectrum, establishing method and application in cigarette oil spot identification |
-
2021
- 2021-11-30 CN CN202111448877.3A patent/CN114295632A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102564816A (en) * | 2010-12-23 | 2012-07-11 | 中国石油化工股份有限公司 | Sample preparation method of viscous solid matter and one-hole sample preparation mold used by same |
| CN202305304U (en) * | 2011-10-28 | 2012-07-04 | 长沙开元仪器股份有限公司 | Elemental analyser and lofting mechanism thereof |
| CN204666427U (en) * | 2015-01-27 | 2015-09-23 | 长沙瑞翔科技有限公司 | Load sample mechanism and water ash content proving installation |
| CN206074440U (en) * | 2016-09-30 | 2017-04-05 | 中南林业科技大学 | A kind of near infrared spectrum automatic on-line detection means |
| CN108254330A (en) * | 2017-12-20 | 2018-07-06 | 苏州禾川化学技术服务有限公司 | A kind of chemical analysis method of neoprene/viscose rayon |
| CN109781654A (en) * | 2019-03-12 | 2019-05-21 | 苏州协鑫光伏科技有限公司 | The detection method that silicon chip surface stains |
| CN209764717U (en) * | 2019-03-18 | 2019-12-10 | 山东金璋隆祥智能科技有限责任公司 | Miniature near-infrared spectrometer transflectance survey appearance device |
| CN210154992U (en) * | 2019-05-21 | 2020-03-17 | 中国农业大学 | Diffuse transmission and diffuse reflection spectrum acquisition device |
| CN110286100A (en) * | 2019-07-08 | 2019-09-27 | 中国科学技术大学 | Infrared external reflection and transmission measurement system and method |
| CN113686805A (en) * | 2021-08-23 | 2021-11-23 | 上海烟草集团有限责任公司 | Oil product characteristic fingerprint spectrum, establishing method and application in cigarette oil spot identification |
Non-Patent Citations (1)
| Title |
|---|
| 杨继涛,季伟: "《基于近红光谱的厌氧发酵关键信息快速检测方法研究》", vol. 1, 哈尔滨工程大学出版社, pages: 172 - 173 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115452772A (en) * | 2022-09-06 | 2022-12-09 | 胜科纳米(苏州)股份有限公司 | Method for detecting adsorbate on surface of LCD screen |
| CN115452772B (en) * | 2022-09-06 | 2023-10-20 | 胜科纳米(苏州)股份有限公司 | Detection method of adsorbate on surface of LCD screen |
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