WO2006112084A1 - 蛍光x線分析装置およびそれに用いるプログラム - Google Patents
蛍光x線分析装置およびそれに用いるプログラム Download PDFInfo
- Publication number
- WO2006112084A1 WO2006112084A1 PCT/JP2005/022552 JP2005022552W WO2006112084A1 WO 2006112084 A1 WO2006112084 A1 WO 2006112084A1 JP 2005022552 W JP2005022552 W JP 2005022552W WO 2006112084 A1 WO2006112084 A1 WO 2006112084A1
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- WIPO (PCT)
- Prior art keywords
- intensity
- sample
- theoretical
- rays
- ray
- Prior art date
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- 0 CC(C*)*CCCC(CC*)*C(CC1CCCC1)(CCC1)CC1S Chemical compound CC(C*)*CCCC(CC*)*C(CC1CCCC1)(CCC1)CC1S 0.000 description 2
- HICUGGYRYZOXJI-UHFFFAOYSA-N CCC1C=CCC1 Chemical compound CCC1C=CCC1 HICUGGYRYZOXJI-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N23/00—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00
- G01N23/22—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by measuring secondary emission from the material
- G01N23/223—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by measuring secondary emission from the material by irradiating the sample with X-rays or gamma-rays and by measuring X-ray fluorescence
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2223/00—Investigating materials by wave or particle radiation
- G01N2223/07—Investigating materials by wave or particle radiation secondary emission
- G01N2223/076—X-ray fluorescence
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2223/00—Investigating materials by wave or particle radiation
- G01N2223/30—Accessories, mechanical or electrical features
- G01N2223/305—Accessories, mechanical or electrical features computer simulations
Definitions
- the present invention relates to a fluorescent X-ray analyzer for analyzing the composition and area density of a sample by the FP method and a program used therefor.
- FP method X-ray fluorescence analyzers that analyze the composition and area density of a sample using a fundamental parameter method
- the theoretical intensity of the secondary X-ray generated by each elemental force in the sample is calculated based on the assumed composition, that is, the element concentration, and the theoretical intensity and the measured intensity measured by the detection means are calculated on the theoretical intensity scale.
- the concentration of the element in the sample, that is, the composition is calculated by successively correcting the assumed concentration of the element so as to match the converted measured intensity converted to.
- a primary X-ray parallel to an infinitely large sample is uniformly irradiated, and the secondary X-ray generated from a part of the X-ray is observed.
- the sample size and the primary X-ray irradiation area are both finite, and the primary X-ray incidence angle varies depending on the incident position.
- the intensity of the X-ray does not completely match the intensity of the secondary X-ray generated in the calculation model. This is called the geometry effect. If the theoretical strength is not calculated by taking the geometry effect into account in full reality, the composition of the sample as an analysis result will not be accurate enough.
- the present invention has been made in view of the above-described conventional problems, and in a fluorescent X-ray analyzer that analyzes the composition and area density of a sample by the FP method and a program used therefor, various samples can be simply and easily obtained.
- the purpose is to provide the one that can calculate the theoretical intensity by taking the geometry effect fully into reality and calculating the theoretical intensity sufficiently accurately.
- the first configuration of the present invention includes an X-ray source that irradiates a sample with primary X-rays, a detection means that measures the intensity of secondary X-rays generated from the sample, and Based on the assumed composition, the theoretical intensity of the secondary X-rays that also generate each elemental force in the sample is calculated, and the converted intensity measured by converting the theoretical intensity and the measured intensity measured by the detection means into a theoretical intensity scale.
- the calculation means calculates the theoretical intensity in a fluorescent X-ray analyzer equipped with a calculation means for calculating the composition of the sample by sequentially correcting and calculating the assumed composition so as to match. In doing so, it is characterized in that the theoretical intensity of the secondary X-ray is calculated for each optical path using the size of the sample and the intensity and incident angle of the primary X-ray irradiated to each position on the sample surface as parameters. .
- the apparatus of the first configuration in calculating the theoretical intensity, the size of the sample and the intensity and incident angle of the primary X-ray irradiated to each position on the sample surface are used as parameters for each optical path.
- the theoretical intensity of the secondary X-rays is calculated by simulation. For various samples that do not require a large number of sensitivity curves to be determined in advance, the theory is simple and the force is taken into account by taking the geometric effect into account in full reality. The intensity can be calculated and quantitative analysis can be performed with sufficient accuracy.
- the total calculation time required to calculate the composition of the sample is longer than before, but it is well within the practical range.
- the calculation unit calculates the theoretical strength for a plurality of the assumed compositions at the same time. According to this preferred configuration, the overall calculation time is shortened.
- the calculation unit uses an incident angle distribution or a scattering angle distribution of primary X-rays on the sample surface that is determined in advance.
- the incident angle distribution and scattering angle distribution of primary X-rays on the sample surface usually do not change unless the X-ray source is changed. Used for calculation of theoretical strength. According to this, the calculation time of theoretical strength is shortened. Therefore, the overall calculation time is also shortened. Since the incident angle distribution and scattering angle distribution of primary X-rays on the sample surface do not change from sample to sample, it is not necessary to obtain a large number like the sensitivity curve in the conventional technique.
- the apparatus having the first configuration preferably includes a sample container provided with a scale for measuring the height of the sample surface.
- the primary X-ray intensity and incident angle irradiated to each position on the sample surface as the above parameters vary depending on the height of the sample surface relative to the X-ray source, so the sample surface height must be known .
- the scale for measuring the height of the sample surface is provided in the sample container, it is easy to measure and adjust the height of the sample surface.
- a second configuration of the present invention is a program for causing a computer included in the device of the first configuration to function as the calculation unit. According to the second configuration program of the present invention, the same operation and effect as the first configuration apparatus can be obtained.
- FIG. 1 is a schematic view showing a fluorescent X-ray analyzer according to an embodiment of the present invention.
- FIG. 2 is a flowchart showing the entire calculation by a calculation means provided in the apparatus.
- FIG. 3 is a flowchart showing calculation of theoretical strength by the calculation means.
- this apparatus generates from a sample stage 8 on which a sample 13 is placed, an X-ray source 1 such as an X-ray tube that irradiates the sample 13 with primary X-rays 2, and the sample 13. And detection means 9 for measuring the intensity of secondary X-rays 4 such as fluorescent X-rays and scattered rays.
- An aperture 11 is provided in front of the X-ray source 1, and the opening of the primary X-ray 2 is determined by the opening.
- a mask 12 is provided immediately above the sample surface 13a, and an irradiation region of the primary X-ray 2 on the sample surface 13a is determined by the opening.
- the detection means 9 includes a spectroscopic element 5 that separates secondary X-rays 4 generated from the sample 13 and a detector 7 that measures the intensity of each of the split secondary X-rays 6.
- a detector with high energy resolution may be used as the detection means without using the spectroscopic element 5.
- the theoretical intensity of the secondary X-ray 4 that also generates each elemental force in the sample 13 is calculated, and the theoretical intensity and the measured intensity measured by the detection means 9 are calculated.
- a calculation means 10 is provided for calculating the concentration of the element in the sample 13, that is, the composition, by calculating the corrected concentration of the assumed element one after another so that it matches the converted measured intensity converted to the theoretical strength scale.
- the optical path (2, 2) is used with the size of the sample 13 and the intensity and incident angle ⁇ of the primary X-ray 2 irradiated to each position on the sample surface 13a as parameters. Calculate the theoretical intensity of secondary X-ray 6 every 4 and 6).
- the calculation means 10 of this embodiment is an element that does not measure fluorescent X-rays such as oxygen and carbon (as the invention is described in Japanese Patent Application No. 2004-251785).
- the average atomic number is assumed and the scattered radiation 4 is used as the corresponding secondary X-ray.
- the assumed average atomic number is corrected and calculated approximately in succession.
- the theoretical intensity and measured intensity of the scattered radiation include the theoretical intensity and measured intensity of the primary X-ray continuous X-ray scattered line, the theoretical intensity and measured intensity of Compton scattered radiation, the theoretical intensity of Thomson scattered radiation and It is possible to use one selected from the measured intensity and the group intensity of the theoretical intensity ratio and the measured intensity ratio of any two of the scattered rays.
- This apparatus operates as follows.
- the sample 13 placed on the sample stage 8 is irradiated with the primary X-ray 2 from the X-ray source 1, and the generated secondary X-ray 4 is incident on the spectroscopic element 5.
- the intensity is measured by detector 7.
- the calculation means 10 performs an operation according to the flowchart shown in FIG. [0019]
- the initial value of the concentration of each measurement element may be set to lmas s%, which can be set according to the sample type.
- the initial value of the average atomic number of non-measuring elements is set to 8, for example.
- step 2 the measured intensity I of fluorescent X-rays and scattered radiation is converted into a theoretical strength measM degree scale according to the following equation (1) to obtain the respective converted measured intensity I.
- step 3 based on the initial value set, the theoretical intensity I and the scattering of each fluorescent X-ray.
- step 4 the concentration of each measurement element and the average atomic number of the non-measurement element are changed to predetermined values, and the theoretical strength after the change is calculated.
- the concentration of element j is changed by dw%, the theoretical intensity I j of element i and the average atom of unmeasured elements
- step 5 the concentration of each measurement element and the average atomic number of the non-measurement element are updated based on the difference equation. Specifically, first, for each fluorescent X-ray and each scattered ray, the differential simultaneous equations of the following formulas (2) and (3) are created and solved to obtain the concentration of each measured element and the average atom of the non-measured element. Find the correction values Awj, ⁇ ⁇ ⁇ for updating the number.
- each differential term is obtained by the following equation (4).
- the intensity of scattered radiation for example, when the intensity ratio of Compton scattered radiation and Thomson scattered radiation is used, the intensity ratio of both scattered radiation is applied where the intensity of a single scattered radiation is used.
- the scattered radiation is expressed as in the following equation (6).
- the intensity ratio of scattered radiation is also applied in degree I and in step 6 described later.
- the concentration of the constant element is obtained by subtracting the total concentration wi of the 100% force measurement element.
- wi wi + ⁇ wj ⁇ ⁇ * (7)
- step 6 the updated concentration wi of each measured element and the average raw material of the non-measured element new
- Convergence is judged by whether the difference from meas ⁇ is less than or equal to a predetermined value.
- the convergence determination may be made based on whether or not the difference between the theoretical intensity and the converted measured intensity is equal to or less than a predetermined ratio (for example, 0.1%) of the converted measured intensity. If it is determined that it has not converged, return to step 4 and repeat the steps up to step 6 until it converges.
- a predetermined ratio for the secondary X-rays generated from the sample (fluorescence X-rays of the measurement element and scattered radiation corresponding to the non-measurement element)
- the assumed concentration of the measured element is matched so that the theoretical intensity and the converted measurement intensity match.
- the average atomic number of the non-measuring element assumed to be corrected is calculated by successive approximation.
- Step 7 the latest concentration of each measurement element, the average atomic number of the non-measurement element, and the area density (or thickness of the sample) as necessary. ) As a result.
- step 5 can be executed separately in the following steps 5A and 5B.
- step 5A the average atomic number of the non-measurement element is fixed, and only the concentration of each measurement element is updated.
- step 5B the concentration of each measured element is fixed to the latest value, ⁇ ⁇ is obtained from the following equation (9), and only the average atomic number of the non-measured element is updated.
- the previous equation (3) is added to the scattered ray, and each equation (2), (3 Add the area density differential term to the right side of).
- the previous equation (3) has two equations: Compton scattered radiation and the previous Thomson scattered radiation.
- calculation means 10 replaces the flowchart shown in FIG. 2 according to a method using a Marquardt method, a simulated one-door method, a genetic algorithm, or the like known as a solution to a nonlinear problem. Let's do the calculation.
- the calculation means 10 of the apparatus calculates the size of the sample 13 and the intensity and incident angle ⁇ of the primary X-ray 2 irradiated to each position on the sample surface 13a.
- the theoretical intensity of secondary X-ray 6 is calculated for each optical path (2, 4, 6). More specifically, the theoretical strength is calculated according to the flowchart shown in Fig. 3 as follows.
- Step 3-1 the generation position and direction of primary X-rays are determined by random numbers.
- step 3-2 primary X-rays are advanced to the sample surface according to the determined generation position and direction.
- Step 3-3 it is determined whether or not the advanced primary X-ray has collided with the aperture 11 or the mask 12 on the way. If there is a collision, go back to step 3-1, If yes, go to Step 3-4.
- step 3-4 the primary X-ray absorption (scattering) position is determined from the sample absorption coefficient and random numbers.
- step 3-5 it is determined whether or not the absorption (scattering) position force is a position deeper than the thickness of the sample. If it is deep, go back to step 3-1, otherwise go to step 3-6.
- step 3-6 the emission direction of secondary X-rays (fluorescent X-rays or scattered rays) generated by the absorption (scattering) of the primary X-rays is determined.
- step 3-7 the intensity of the secondary X-ray whose emission direction is determined is calculated, and in step 3-8, the calculated intensity is recorded.
- step 3-9 it is determined whether or not the force has generated primary X-rays for the number of times that has been pre-set. If not, go back to step 3-1. If yes, go to step 3-10.
- step 3-10 the total intensity recorded in step 3-8 is the theoretical intensity obtained.
- steps 3-1 to 3-3 do not depend on the sample, and can be calculated in advance. When doing so, calculate and store the primary X-ray generation position and direction on the sample surface for each trial a predetermined number of times. Then, step 3-1 to 3-3 replace the step of sequentially storing the generation position and direction of the primary X-ray with the actual sample stored in the previous calculation.
- the random numbers used in step 3-4 can be generated at the same time in each trial of the calculations performed in advance, and stored together with the primary X-ray generation position and direction. By doing so, it is not necessary to generate a random number that requires a relatively long calculation time during the actual calculation for each sample, and the calculation time can be further reduced.
- the size of the sample 13 and the intensity and input of the primary X-ray 2 irradiated to each position on the sample surface 13a are calculated. Since the theoretical intensity of secondary X-ray 6 is simulated for each optical path (2, 4, 6) using the angle of incidence ⁇ as a parameter (also called ray-trace calculation or light-tracing method), a large number of sensitivity curves can be obtained. For various samples 13 that do not need to be determined in advance, it is possible to calculate the theoretical strength with simplicity and force, taking into account the effect of the geometry, and quantitative analysis can be performed with sufficient accuracy. Note that the total calculation time required to calculate the yarn length of the sample 13 is longer than the conventional one, but is sufficiently within the practical range.
- the calculation means 10 simultaneously calculates the theoretical strength for a plurality of assumed compositions in steps 1 to 4. According to this preferred configuration, the overall calculation time is shortened.
- the calculation means 10 use the incident angle ⁇ distribution or the scattering angle ⁇ distribution of the primary X-rays on the sample surface that has been determined in advance. These distributions are taken into consideration of the detection efficiency of the spectroscopic element 5.
- the primary X-ray incident angle ⁇ distribution and the scattering angle ⁇ distribution on the sample surface usually do not change unless the X-ray source 1 is changed. It is used for calculation of theoretical strength. According to this, since the calculation time of the theoretical strength is shortened, the overall calculation time is also shortened. This is particularly effective when the sample 13 is thin such as a thin film. Since the incident angle ⁇ distribution and scattering angle ⁇ distribution of primary X-rays on the sample surface do not change from sample to sample, it is necessary to obtain a large number like the sensitivity curve in the prior art. Absent.
- a sample container 14 provided with a scale 14a for measuring the height of the sample surface as shown in FIG.
- a rice cooker with a scale on the inside.
- the sample surface The height of 13a must be known.
- the scale 14a for measuring the height of the sample surface 13a is provided in the sample container 14 of FIG. 4, it is easy to measure and adjust the height of the sample surface 13a.
- the apparatus normally includes a computer, but a program for causing the computer to function as the calculation means is also an embodiment of the present invention.
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Abstract
Description
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Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN2005800493510A CN101151524B (zh) | 2005-04-06 | 2005-12-08 | 荧光x射线分析装置和其所采用的程序 |
EP05814603A EP1870699A4 (en) | 2005-04-06 | 2005-12-08 | X-RAY FLUORESCENCE SPECTROSCOPE AND PROGRAM USED BY THIS SPECTROSCOPE |
US11/910,510 US7961842B2 (en) | 2005-04-06 | 2005-12-08 | X-ray fluorescence spectrometer and program used therein |
Applications Claiming Priority (2)
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JP2005-109503 | 2005-04-06 | ||
JP2005109503A JP3965191B2 (ja) | 2005-04-06 | 2005-04-06 | 蛍光x線分析装置およびそれに用いるプログラム |
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WO2006112084A1 true WO2006112084A1 (ja) | 2006-10-26 |
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PCT/JP2005/022552 WO2006112084A1 (ja) | 2005-04-06 | 2005-12-08 | 蛍光x線分析装置およびそれに用いるプログラム |
Country Status (5)
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US (1) | US7961842B2 (ja) |
EP (1) | EP1870699A4 (ja) |
JP (1) | JP3965191B2 (ja) |
CN (1) | CN101151524B (ja) |
WO (1) | WO2006112084A1 (ja) |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
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JP5448347B2 (ja) * | 2008-01-29 | 2014-03-19 | 三菱重工業株式会社 | 爆発物検査装置 |
JP5276382B2 (ja) * | 2008-08-28 | 2013-08-28 | 株式会社リガク | 蛍光x線分析装置 |
JP2011099749A (ja) * | 2009-11-05 | 2011-05-19 | Horiba Ltd | 濃度計測方法及び蛍光x線分析装置 |
JP5634763B2 (ja) * | 2010-06-21 | 2014-12-03 | 株式会社堀場製作所 | 蛍光x線分析装置及びコンピュータプログラム |
CN102226774B (zh) * | 2011-03-31 | 2013-08-07 | 广东出入境检验检疫局检验检疫技术中心 | 多功能x射线荧光能谱仪样品盘及其检测方法 |
WO2015056305A1 (ja) * | 2013-10-15 | 2015-04-23 | 株式会社島津製作所 | 蛍光x線分析方法及び蛍光x線分析装置 |
WO2015056304A1 (ja) * | 2013-10-15 | 2015-04-23 | 株式会社島津製作所 | 蛍光x線分析方法及び蛍光x線分析装置 |
JP6175662B2 (ja) * | 2015-08-10 | 2017-08-09 | 株式会社リガク | 蛍光x線分析装置 |
CN110312928B (zh) * | 2017-03-15 | 2021-03-26 | 株式会社理学 | 荧光x射线分析方法以及荧光x射线分析装置 |
CN112461876B (zh) * | 2019-09-06 | 2022-10-28 | 余姚舜宇智能光学技术有限公司 | 基于能量色散荧光x光谱仪的待测样品参数检测方法及其检测系统 |
JP6944730B2 (ja) * | 2020-02-12 | 2021-10-06 | 株式会社リガク | 定量分析方法、定量分析プログラム及び蛍光x線分析装置 |
JP7249666B2 (ja) | 2020-10-30 | 2023-03-31 | 株式会社リガク | 蛍光x線分析装置 |
EP4276452B1 (en) * | 2022-05-13 | 2024-07-03 | Bruker AXS GmbH | System and method for determining mass fractions in a test sample with wave-length dispersive x-ray fluorescence spectrometers |
Citations (3)
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JPS5420360B2 (ja) * | 1978-04-28 | 1979-07-21 | ||
JP2001083109A (ja) * | 1999-09-09 | 2001-03-30 | Rigaku Corp | 蛍光x線分析方法およびその装置 |
JP2003297891A (ja) * | 2002-01-31 | 2003-10-17 | Rigaku Industrial Co | 半導体用蛍光x線分析装置 |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2853261B2 (ja) * | 1989-05-16 | 1999-02-03 | 三菱マテリアル株式会社 | 金属分析方法および分析装置 |
US6130931A (en) * | 1998-09-17 | 2000-10-10 | Process Control, Inc. | X-ray fluorescence elemental analyzer |
US6292532B1 (en) * | 1998-12-28 | 2001-09-18 | Rigaku Industrial Corporation | Fluorescent X-ray analyzer useable as wavelength dispersive type and energy dispersive type |
DE10159828B4 (de) * | 2001-12-06 | 2007-09-20 | Rigaku Industrial Corporation, Takatsuki | Röntgenfluoreszenzspektrometer |
JP3965173B2 (ja) | 2004-08-31 | 2007-08-29 | 理学電機工業株式会社 | 蛍光x線分析装置およびそれに用いるプログラム |
JP4247559B2 (ja) * | 2005-06-07 | 2009-04-02 | 株式会社リガク | 蛍光x線分析装置およびそれに用いるプログラム |
-
2005
- 2005-04-06 JP JP2005109503A patent/JP3965191B2/ja active Active
- 2005-12-08 CN CN2005800493510A patent/CN101151524B/zh active Active
- 2005-12-08 US US11/910,510 patent/US7961842B2/en active Active
- 2005-12-08 WO PCT/JP2005/022552 patent/WO2006112084A1/ja not_active Application Discontinuation
- 2005-12-08 EP EP05814603A patent/EP1870699A4/en not_active Ceased
Patent Citations (3)
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JPS5420360B2 (ja) * | 1978-04-28 | 1979-07-21 | ||
JP2001083109A (ja) * | 1999-09-09 | 2001-03-30 | Rigaku Corp | 蛍光x線分析方法およびその装置 |
JP2003297891A (ja) * | 2002-01-31 | 2003-10-17 | Rigaku Industrial Co | 半導体用蛍光x線分析装置 |
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MORI Y. ET AL.: "A depth profile fitting model for a commercial total reflection X-ray fluorescence spectrometer", SPECTROCHIMICA ACTA PART B, vol. 52, 1997, pages 823 - 828, XP003003248 * |
See also references of EP1870699A4 * |
Also Published As
Publication number | Publication date |
---|---|
JP2006292399A (ja) | 2006-10-26 |
CN101151524B (zh) | 2013-06-05 |
EP1870699A1 (en) | 2007-12-26 |
US7961842B2 (en) | 2011-06-14 |
CN101151524A (zh) | 2008-03-26 |
JP3965191B2 (ja) | 2007-08-29 |
US20090041184A1 (en) | 2009-02-12 |
EP1870699A4 (en) | 2012-01-04 |
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