CN117825355B - SES-based method for measuring metal particle content in surface pollution - Google Patents
SES-based method for measuring metal particle content in surface pollution Download PDFInfo
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- CN117825355B CN117825355B CN202410014190.6A CN202410014190A CN117825355B CN 117825355 B CN117825355 B CN 117825355B CN 202410014190 A CN202410014190 A CN 202410014190A CN 117825355 B CN117825355 B CN 117825355B
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- 239000002923 metal particle Substances 0.000 title claims abstract description 135
- 238000000034 method Methods 0.000 title claims abstract description 38
- 238000012360 testing method Methods 0.000 claims abstract description 57
- 238000005070 sampling Methods 0.000 claims abstract description 55
- 238000011088 calibration curve Methods 0.000 claims abstract description 19
- 238000005516 engineering process Methods 0.000 claims abstract description 13
- 238000005259 measurement Methods 0.000 claims abstract description 12
- 238000003825 pressing Methods 0.000 claims abstract description 5
- 239000000443 aerosol Substances 0.000 claims description 30
- 239000002390 adhesive tape Substances 0.000 claims description 23
- 230000003595 spectral effect Effects 0.000 claims description 19
- 239000000463 material Substances 0.000 claims description 16
- 229910052782 aluminium Inorganic materials 0.000 claims description 13
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 13
- 238000011109 contamination Methods 0.000 claims description 13
- 239000000843 powder Substances 0.000 claims description 11
- 229910001220 stainless steel Inorganic materials 0.000 claims description 9
- 239000010935 stainless steel Substances 0.000 claims description 9
- 230000005284 excitation Effects 0.000 claims description 8
- 239000002245 particle Substances 0.000 claims description 8
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 6
- 229910052802 copper Inorganic materials 0.000 claims description 6
- 239000010949 copper Substances 0.000 claims description 6
- 238000012935 Averaging Methods 0.000 claims description 5
- 230000008021 deposition Effects 0.000 claims description 3
- 238000004458 analytical method Methods 0.000 description 7
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- 239000000428 dust Substances 0.000 description 3
- 238000001228 spectrum Methods 0.000 description 3
- 231100000331 toxic Toxicity 0.000 description 3
- 230000002588 toxic effect Effects 0.000 description 3
- 239000003496 welding fume Substances 0.000 description 3
- 238000002354 inductively-coupled plasma atomic emission spectroscopy Methods 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- UPWOEMHINGJHOB-UHFFFAOYSA-N oxo(oxocobaltiooxy)cobalt Chemical compound O=[Co]O[Co]=O UPWOEMHINGJHOB-UHFFFAOYSA-N 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 238000001479 atomic absorption spectroscopy Methods 0.000 description 1
- 238000000889 atomisation Methods 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 230000029087 digestion Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000037406 food intake Effects 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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- Sampling And Sample Adjustment (AREA)
Abstract
A measuring method of metal particle content in SES-based surface pollution includes providing a test board surface with metal particle pollution concentration; tightly attaching the surface of the test board to the outer edge of an open area template, and pressing and collecting deposited metal particles in the inner area of the open area template by using a sampling head; detecting the content of metal particles on a sampling head to be detected by adopting an SES technology, and obtaining the SES signal intensity of the metal particles; fitting a calibration curve according to SES signal intensity of the metal particles and metal particle concentration corresponding to the SES signal intensity of the metal particles; the concentration of metal particles on the surface of the test plate is determined based on the SES signal intensity of the metal particles and the calibration curve. The method has the advantages of simple operation process and low equipment cost, and the sampling tape in the sampling head is used for concentrating and collecting the metal particles in the surface pollution, and then the SES technology is used for realizing the on-site rapid and accurate measurement of the metal particles.
Description
Technical Field
The invention relates to a method for measuring the content of metal particles in surface pollution, in particular to a method for measuring the content of metal particles in surface pollution based on SES, and belongs to the technical field of dust content detection.
Background
The toxic metal particles contained in the air may be generated by various industrial activities, and the surfaces of these workplaces are likely to be contaminated with toxic metal due to the deposition of dust in the air, and workers may also be exposed to direct contact with the skin due to contact with some of the contaminated surfaces, or may be exposed to ingestion and inhalation due to the transfer or re-suspension of settled dust, which may pose a significant health risk to the workers. Thus, in an industrial setting, detecting surface contamination of toxic metals is of great importance for assessing the likelihood of worker exposure to hazards, determining the source of the contaminants, and assessing the effectiveness of hygiene practices.
Current common methods for measuring surface metals include surface wiping sampling followed by laboratory analysis using inductively coupled plasma atomic emission spectroscopy (ICP-AES) or Atomic Absorption Spectroscopy (AAS). Standard surface sampling and analysis methods have evolved well, such as NIOSH 9100, NIOSH 9102 and ASTM D7659-10, however, these methods require digestion of the wipe sample prior to analysis and are time consuming and laborious; at least hours or even days are required to receive the analysis results. Therefore, how to provide a new method, which can rapidly and accurately measure the surface metal on site, and has the advantages of simple operation process and low equipment cost is the direction of research in the industry.
Disclosure of Invention
The invention aims to provide a measuring method for the content of metal particles in surface pollution based on SES, which has the advantages of simple operation process and low equipment cost, and the metal particles in the surface pollution are concentrated and collected by utilizing a sampling tape in a sampling head, and then the SES technology is used for realizing the on-site rapid and accurate measurement of the metal particles.
In order to achieve the above object, the present invention provides a method for measuring the content of metal particles in SES-based surface contamination, comprising the steps of:
s1: providing a test plate surface having a metal particle contamination concentration;
s2: tightly attaching the surface of the test board to the outer edge of an open area template, and pressing and collecting deposited metal particles in the inner area of the open area template by using a sampling head;
S3: detecting the content of metal particles on a sampling head to be detected by adopting an SES technology, and obtaining the SES signal intensity of the metal particles;
s4: fitting a calibration curve according to SES signal intensities of metal particles with different concentrations and metal particle concentrations corresponding to the SES signal intensities of the metal particles with different concentrations;
S5: the concentration of metal particles on the surface of the test plate is determined based on the SES signal intensity of the metal particles at step S3 and the calibration curve at step S4.
The method for preparing the surface of the test board in the step S1 comprises the following steps:
s11: providing a clean test plate, an aerosol generator, an aerosol chamber and said metal particle powder material;
S12: placing a clean test plate on a stainless steel screen mesh at the middle height of an aerosol chamber, atomizing and dispersing the metal particle powder material into the aerosol chamber through an aerosol generator;
s13: after a predetermined time, the aerosol generator is turned off, and the dispersed aerosol is allowed to precipitate on the test plate for 1-2 hours.
The open area template of the present invention includes 36 uniformly distributed square voids of 0.16cm 2 for selection of the test panel surface contamination area.
The sampling surface area of the sampling head is 0.1cm 2, so that the sampling head can be conveniently and fully contacted with metal particles in an open area template area.
In the step S2, the sampling head is used to collect the metal particles deposited in the inner area of the open area template in a pressing manner, specifically: the sampling head is vertically placed on the surface of the test board, is uniformly pressed with force, so that the sampling adhesive tape is fully contacted with the surface of the test board, and then is lifted; for each measurement, 36 tape lifting samples were taken from the selected surface to obtain a concentrated particle mass loading on the sampled tape.
In step S3, the SES technology is adopted to detect the content of the metal particles on the sampling head to be detected, so as to obtain the SES signal intensity of the metal particles, which is specifically as follows: taking a sampling adhesive tape stuck at the bottom end of a square rod in a sampling head as a grounding electrode, coaxially and oppositely placing the end of the adhesive tape for collecting samples and a sharp electrode, enabling metal particles to be tested to form plasma under the excitation of high-voltage pulse, and recording spectral line spectral intensity values I x of the metal particles to be tested with the wavelength range of 245-404nm of the spectrometer under each spark under the excitation of multiple sparks, wherein the spectral line spectral intensity value of the metal particles in each spark is the integral of atomic emission line intensity below a characteristic spectral peak minus a base line area, and the sum of the spectral line spectral intensity values of the metal particles in all sparks is the SES signal intensity of the metal particles in each sparkExciting the surfaces of other repeatedly collected test plates to obtain SES signal intensity I Strength of j (j=1, 2,3 and … …) of multiple groups of metal particles, and averaging to obtain SES signal intensity/>, of the metal particles under the concentration
The calibration curve formula in step S4 is:
I＝b+aC
wherein: i is signal intensity;
a and b are unknown parameters, and are fitted by different signal intensities I and metal particle concentrations C;
C is the metal particle concentration.
The metal particle concentration on the surface of the test plate in step S5 is:
The sampling head comprises a square rod, an adhesive tape and a fixed bracket; the adhesive tape is stuck to the bottom end of the square rod, and the fixing support is fixed at the upper position of the square rod.
The square bar is 0.32x0.32x5.08cm in size, and is made of stainless steel; the adhesive tape is made of 3M double-sided conductive copper material.
The surface size of the test board is 7.6x7.6cm, and the test board is made of aluminum plates.
Compared with the prior art, the invention does not need to carry out complex preparation treatment on a metal particle sample before analysis, the test powder material is dispersed into an aerosol chamber after being atomized, after a preset time, the aerosol generator is closed, the dispersed aerosol is deposited on a test board, the surface of the test board with the metal particle pollution concentration can be obtained, then, after an open area template is used for selecting an acquisition area, 36 areas in the open area template are sequentially concentrated and acquired by utilizing a sampling adhesive tape in a sampling head, and the subsequent test analysis can be carried out. Meanwhile, the analysis and detection method used by the invention can also realize the rapid and accurate measurement of the content of the surface metal particles, the SES technology is adopted to detect the content of the metal particles on the sampling head to be detected, the SES signal intensity of the metal particles is obtained, and a calibration curve is fitted according to the SES signal intensity of the metal particles with different concentrations and the metal particle concentrations corresponding to the SES signal intensity of the metal particles with different concentrations; the concentration of metal particles on the surface of the test plate is determined based on the SES signal intensity of the metal particles and the calibration curve. The method has the advantages of simple operation process and low equipment cost, and the sampling tape in the sampling head is used for concentrating and collecting the metal particles in the surface pollution, and then the SES technology is used for realizing the on-site rapid and accurate measurement of the metal particles.
Drawings
FIG. 1 is a schematic flow chart of the present invention;
FIG. 2 is a spectrum obtained by detecting metal particles on the surface of the aluminum plate to be detected by SES technology in example 1;
FIG. 3 is a calibration curve provided in example 1;
FIG. 4 is a graph showing the comparison of the concentration of elements on the surface of welding fume pollution measured by SES method and NIOSH 9102 method in example 2;
in the figure: 1. the surface of the test board comprises 2 parts of the test board, 3 parts of the sampling head, 3 parts of the square rod, 4 parts of the fixing support, 5 parts of the fixing support and the adhesive tape.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
As shown in fig. 1, a method for measuring the content of metal particles in SES-based surface contamination includes the steps of:
S1: providing a test plate surface 1 having a metal particle contamination concentration;
The method comprises the following steps:
S11: firstly, providing a clean test board, an aerosol generator, an aerosol chamber and the metal particle powder material;
S12: placing a clean test plate on a stainless steel screen mesh at the middle height of an aerosol chamber, atomizing and dispersing the metal particle powder material into the aerosol chamber through an aerosol generator;
s13: after a predetermined time, the aerosol generator is turned off, and the dispersed aerosol is allowed to precipitate on the test plate for 1-2 hours, thereby obtaining the surface of the test plate with the metal particle pollution concentration.
S2: tightly attaching the surface of the test board to the outer edge of an open area template, and collecting deposited metal particles in the inner area of the open area template by using a sampling head 2; the open area template comprises 36 square gaps which are uniformly distributed and are 0.16cm 2 and used for selecting a pollution area on the surface of the test board; the sampling head 2 comprises a square rod 3, an adhesive tape 5 and a fixed bracket 4; the adhesive tape 5 is stuck to the bottom end of the square rod 3, and the fixing support 4 is fixed at the middle upper position of the square rod 3;
The method comprises the following steps: the sampling head 2 is vertically arranged on the surface 1 of the test board, is pressed with even force, so that the sampling adhesive tape 5 is fully contacted with the surface 1 of the test board, and is lifted; for each measurement, 36 tape lifting samples were taken from the selected surface to obtain a concentrated particle mass loading on the sampled tape.
S3: detecting the content of metal particles on a sampling head to be detected by adopting an SES technology, and obtaining the SES signal intensity of the metal particles;
The method comprises the following steps: taking a sampling adhesive tape stuck at the bottom end of a square rod in a sampling head as a grounding electrode, coaxially and oppositely placing the end of the adhesive tape for collecting samples and a sharp electrode, enabling metal particles to be tested to form plasma under the excitation of high-voltage pulse, and recording spectral line spectral intensity value I x of the metal particles to be tested with the wavelength range of 245-404nm of the spectrometer under each spark under the excitation of multiple sparks, wherein the spectral line spectral intensity value of the metal particles of each spark is the integral of atomic emission line intensity below a characteristic spectral peak minus a baseline area (the operation is a baseline removing operation and can be realized through origin software), and the sum of the spectral line spectral intensity values of the metal particles in all sparks is the SES signal intensity of the metal particles of the same time Exciting the surfaces of other repeatedly collected test boards to obtain SES signal intensities I Strength of j (j=1, 2, 3.) of a plurality of groups of metal particles, and averaging the SES signal intensities to obtain SES signal intensities/>, of the metal particles under the concentration
S4: fitting a calibration curve according to SES signal intensity of the metal particles and metal particle concentration corresponding to the SES signal intensity of the metal particles, wherein the calibration curve formula is as follows:
I＝b+aC
wherein: i is signal intensity;
a and b are unknown parameters, and are fitted by different signal intensities I and metal particle concentrations C;
C is the metal particle concentration.
S5: determining the concentration of the metal particles on the surface of the test plate based on the SES signal intensity of the metal particles in the step S3 and the calibration curve in the step S4, wherein the concentration of the metal particles is as follows:
the sampling surface area of the sampling head is 0.1cm 2, so that the sampling head can be conveniently and fully contacted with metal particles in the open area template area.
The square bar is 0.32x0.32x5.08cm in size and is made of stainless steel; the adhesive tape is made of 3M double-sided conductive copper material.
The surface size of the test board is 7.6x7.6cm, and the material of the test board is aluminum plate.
Examples of the invention are given below
Example 1
(1) Preparation of aluminum plate surface with metal particle pollution concentration
Placing a clean aluminum plate on a stainless steel screen mesh at the middle height of an aerosol chamber, preparing four test powders of Fe2O3, mnO2, cr2O3 and Co2O3, uniformly mixing the four test powder materials, atomizing and dispersing the four test powder materials into the aerosol chamber with the diameter of 30cm and the height of 122cm, and simultaneously keeping the flow rate in the aerosol chamber at 10L min -1. After a predetermined time, the aerosol generator was turned off, and the dispersed aerosol was allowed to precipitate on an aluminum plate for 1 hour, whereby Co, cr, fe, mn kinds of aluminum plate surfaces having metal particle contamination concentrations of 2004ng/cm2, 353ng/cm2, 397ng/cm2, 587ng/cm2 were obtained, while three same concentration metal particle aluminum plate surfaces were prepared for repeated measurement and averaging.
(2) Enrichment concentration and measurement of metal particles on surface of aluminum plate with pollution concentration
The surface of an aluminum plate with pollution concentration is tightly attached to the outer edge of an open area template, a copper adhesive tape 5 which is adhered to the bottom end of a stainless steel square rod 3 in a sampling head 2 with the concentration of pollution is vertically arranged above the open area template, 36 uniformly distributed metal particles deposited in a region with the concentration of 0.16cm 2 in the open area template are sequentially pressed and collected to obtain concentrated particle mass load on the sampling adhesive tape 5, then the sampling head 2 is moved into an SES measuring device and measured by adopting SES technology, specifically, the stainless steel square rod 3 in the sampling head 2 is taken as a grounding electrode, the adhesive tape 5 end enriched with Co, cr, fe, mn four metal particles is coaxially and oppositely arranged with a sharp electrode, so that the metal particles form plasma under the excitation of high-voltage pulse, ten spark excitation is carried out on the plasma, the spectrum intensity value I x of the metal particles under each time of spark is recorded, and the sum of spectrum intensity values of the metal particles in ten sparks is the SES signal intensity of the metal particles under each time is recorded within the wavelength range of 245-404nm of a spectrometerThe SES signal intensity I Strength of 1、I Strength of 2、I Strength of 3 of the three groups of metal particles can be obtained by respectively enriching and exciting the surfaces of the three groups of test plates with the same concentration, and the SES signal intensity/>, of the metal particles with the concentration can be obtained by averaging the SES signal intensitiesThe SES signal intensities of the metal particles corresponding to the concentrations of the four metal particles Co, cr, fe, mn in the above (1) were 20714.80a.u., 24177.34a.u., 13256.72a.u., 10740.13a.u., respectively.
(3) Fitting a calibration curve according to SES signal intensities of metal particles with different concentrations and metal particle concentrations corresponding to the SES signal intensities of the metal particles with different concentrations, wherein the calibration curve is obtained through the following steps:
6 aluminum plate surfaces with Co particle concentrations of 67ng/cm2, 132ng/cm2, 401ng/cm2, 802ng/cm2, 2004ng/cm2, 4008ng/cm2, cr particle concentrations of 15ng/cm2, 29ng/cm2, 88ng/cm2, 177ng/cm2, 353ng/cm2, 707ng/cm2, fe particle concentrations of 17ng/cm2, 33ng/cm2, 99ng/cm2, 198ng/cm, 397ng/cm2, 794ng/cm2, mn particle concentrations of 25ng/cm2, 48ng/cm2, 147ng/cm2, 294ng/cm2, 587ng/cm2, 1174ng/cm2 are prepared by setting different powder material atomization times;
Selecting a sampling area on the surface of an aluminum plate by using an open area template, and then concentrating and collecting the sampling area 36 times by using a copper adhesive tape 5 in a sampling head 2 to obtain a plurality of adhesive tape 5 collection amounts with different concentrations;
Detecting the concentration collection amount in the sampling head 2 by adopting an SES technology to obtain SES signal intensities of a plurality of metal particles with different concentrations;
fitting the calibration curve based on SES signal intensities of a plurality of metal particles with different concentrations and concentrations of the metal particles corresponding to the SES signal intensities of the metal particles, as shown in FIG. 3, to obtain Co, cr, fe, mn calibration curve formulas of I Co＝8.4CCo +3756.2 respectively
The detection results are as follows:
Using the method provided in example 1 for the measurement of Co, cr, fe, mn metal particles having surface concentrations of 2004ng/cm2, 353ng/cm2, 397ng/cm2, 587ng/cm2, respectively, representative emission signals of Co, cr, fe, mn metal particles on copper tape are shown in FIG. 2, it can be seen that the four metal particles can obtain significant spectral signals at their respective surface concentrations. Based on the SES signal intensity of the four metal particles and the concentration formula obtained by the respective calibration curve, namely The surface concentrations of the samples were calculated to be 2019ng/cm2, 347ng/cm2, 396ng/cm2 and 597ng/cm2, respectively, which are similar to the actual concentrations.
Example 2
The procedure used in example 1 was applied to elemental concentration measurements of a welding fume deposition surface, and the procedure of this example was essentially the same as in example 1, i.e., a test surface having four levels of welding fume contamination was prepared according to the procedure described in the methods section, and the test surface was measured using the SES method and standard NIOSH method 9102, respectively. The measurement results are shown in FIG. 4, and as can be seen from the comparison of the concentrations of Cr, fe and Mn in the surface elements measured by SES and NIOSH method 9102 in FIG. 4, the results of the two methods show good correlation. Wherein R2 of Cr, fe and Mn is respectively 0.88, 0.97 and 0.98, and normalized root mean square error NRMSD is respectively 58%,25% and 36%.
The above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; it should be noted that: it will be appreciated by those skilled in the art that modifications and/or variations may be made to the embodiments described above without departing from the spirit of the embodiments of the present invention.
Claims (5)
1. A method for measuring the content of metal particles in SES-based surface contamination, comprising the steps of:
s1: providing a test plate surface having a metal particle contamination concentration;
s2: tightly attaching the surface of the test board to the outer edge of an open area template, and pressing and collecting deposited metal particles in the inner area of the open area template by using a sampling head;
S3: detecting the content of metal particles on a sampling head to be detected by adopting an SES technology, and obtaining the SES signal intensity of the metal particles;
s4: fitting a calibration curve according to SES signal intensities of metal particles with different concentrations and metal particle concentrations corresponding to the SES signal intensities of the metal particles with different concentrations;
S5: determining the concentration of the metal particles on the surface of the test plate based on the SES signal intensity of the metal particles in the step S3 and the calibration curve in the step S4;
the method for preparing the surface of the test board in the step S1 comprises the following steps:
S11: providing a clean test plate, an aerosol generator, an aerosol chamber and a metal particle powder material;
S12: placing a clean test plate on a stainless steel screen mesh at the middle height of an aerosol chamber, atomizing and dispersing the metal particle powder material into the aerosol chamber through an aerosol generator;
s13: after a preset time, turning off the aerosol generator to enable the dispersed aerosol to be deposited on the test board, wherein the deposition time is 1-2 hours, and the aerosol can be obtained;
the open area template comprises 36 square gaps which are uniformly distributed and are 0.16 cm 2 and used for selecting a pollution area on the surface of the test board;
The sampling head comprises a square rod, an adhesive tape and a fixed bracket; the adhesive tape is stuck to the bottom end of the square rod, and the fixing support is fixed at the upper position of the square rod;
In the step S2, the sampling head is used to collect the metal particles deposited in the inner area of the open area template in a pressing manner, specifically: the sampling head is vertically placed on the surface of the test board, is uniformly pressed with force, so that the sampling adhesive tape is fully contacted with the surface of the test board, and then is lifted; for each measurement, 36 tape lifting samples were taken from the selected surface to obtain a concentrated particle mass loading on the sampled tape;
in step S3, the SES technology is adopted to detect the content of the metal particles on the sampling head to be detected, so as to obtain the SES signal intensity of the metal particles, which is specifically as follows: the square rod in the sampling head is used as a grounding electrode, and the tape end for collecting the sample and the sharp electrode are coaxially and oppositely placed, so that the metal particles to be tested form plasma under the excitation of high-voltage pulse, and the spectral line spectral intensity value of the metal particles to be tested, of which the wavelength range of the spectrometer is 245-404 nm under each spark, is recorded under the excitation of multiple sparks The sum of spectral line spectral intensity values of all metal particles in the spark, i.e. SES signal intensity of this metal particleExciting the surfaces of other repeatedly collected test boards to obtain SES signal intensity/>, of a plurality of groups of metal particlesAveraging the signal to obtain SES signal intensity of metal particles at the concentration；
The calibration curve formula in step S4 is:，
Wherein: Is the signal intensity;
Is an unknown parameter;
Is the concentration of metal particles.
2. The method for measuring the metal particle content in SES-based surface contamination according to claim 1, wherein the concentration of the metal particles on the surface of the test plate in step S5 is:
。
3. The method of claim 1, wherein the sampling surface area of the sampling head is 0.1cm 2, so that the sampling head can be in full contact with the metal particles in the open area template area.
4. A method for measuring the metal particle content in SES-based surface contamination according to claim 3, wherein the square bar is 0.32x0.32x5.08cm in size and is made of stainless steel material; the adhesive tape is made of 3M double-sided conductive copper material.
5. A method for measuring the metal particle content in SES-based surface contamination according to claim 3, wherein the surface size of the test plate is 7.6x7.6cm, and the test plate material is an aluminum plate.
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| JP2015040141A (en) * | 2013-08-21 | 2015-03-02 | 日東電工株式会社 | Carbon nanotube microprobe |
| CN209707139U (en) * | 2019-03-12 | 2019-11-29 | 河南师范大学 | A kind of body surface heavy metal sampling apparatus using tape method |
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| US11948700B2 (en) * | 2020-11-11 | 2024-04-02 | Grant Charters | In-situ method of drilling to collect dry samples from a nuclear reactor core interior for analysis |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2015040141A (en) * | 2013-08-21 | 2015-03-02 | 日東電工株式会社 | Carbon nanotube microprobe |
| CN110869736A (en) * | 2017-07-03 | 2020-03-06 | 宝洁公司 | Method for measuring metal contaminants on skin |
| CN209707139U (en) * | 2019-03-12 | 2019-11-29 | 河南师范大学 | A kind of body surface heavy metal sampling apparatus using tape method |
| CN111678969A (en) * | 2020-06-05 | 2020-09-18 | 农业农村部环境保护科研监测所 | Method for analyzing heavy metal pollution source by using soil profile surface layer heavy metal accumulation proportion |
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