WO2013191582A2 - Spectromètre à absorption atomique utilisant l'effet de zeeman - Google Patents
Spectromètre à absorption atomique utilisant l'effet de zeeman Download PDFInfo
- Publication number
- WO2013191582A2 WO2013191582A2 PCT/RU2013/000409 RU2013000409W WO2013191582A2 WO 2013191582 A2 WO2013191582 A2 WO 2013191582A2 RU 2013000409 W RU2013000409 W RU 2013000409W WO 2013191582 A2 WO2013191582 A2 WO 2013191582A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- radiation
- monochromator
- polarizer
- atomizer
- spectrometer
- Prior art date
Links
- 238000010521 absorption reaction Methods 0.000 title claims abstract description 35
- 230000000694 effects Effects 0.000 title claims abstract description 18
- 230000005855 radiation Effects 0.000 claims abstract description 83
- 230000001360 synchronised effect Effects 0.000 claims abstract description 7
- 238000006243 chemical reaction Methods 0.000 claims description 12
- 239000000835 fiber Substances 0.000 claims description 12
- 239000013307 optical fiber Substances 0.000 claims description 6
- 238000005259 measurement Methods 0.000 abstract description 10
- 238000004458 analytical method Methods 0.000 abstract description 8
- 230000009471 action Effects 0.000 abstract description 6
- 238000000034 method Methods 0.000 abstract description 6
- 230000003287 optical effect Effects 0.000 abstract description 5
- 230000008569 process Effects 0.000 abstract description 4
- 238000001479 atomic absorption spectroscopy Methods 0.000 abstract description 2
- 229910052729 chemical element Inorganic materials 0.000 abstract description 2
- 230000005540 biological transmission Effects 0.000 abstract 1
- 230000010287 polarization Effects 0.000 description 21
- 230000010355 oscillation Effects 0.000 description 9
- 230000028161 membrane depolarization Effects 0.000 description 5
- 230000010363 phase shift Effects 0.000 description 5
- 230000000737 periodic effect Effects 0.000 description 3
- 230000003595 spectral effect Effects 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 1
- 238000001874 polarisation spectroscopy Methods 0.000 description 1
- 238000010183 spectrum analysis Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/21—Polarisation-affecting properties
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
- G01J3/28—Investigating the spectrum
- G01J3/42—Absorption spectrometry; Double beam spectrometry; Flicker spectrometry; Reflection spectrometry
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/3103—Atomic absorption analysis
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
- G01J3/02—Details
- G01J3/0205—Optical elements not provided otherwise, e.g. optical manifolds, diffusers, windows
- G01J3/0218—Optical elements not provided otherwise, e.g. optical manifolds, diffusers, windows using optical fibers
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/3103—Atomic absorption analysis
- G01N2021/3111—Atomic absorption analysis using Zeeman split
Definitions
- the invention relates to analytical instrumentation and can be used to determine the content of chemical elements in samples of various types by atomic absorption spectrometry.
- the analyzed sample is transferred to the state of atomic vapor through which a resonant radiation beam is passed for the element being determined, and the content of the element in the sample is determined by the amount of radiation absorption. Since the absorption of radiation occurs both by the atoms of the element being determined (the so-called “resonant” or “selective” absorption) and by other particles (the so-called “background” or “non-selective” absorption), they must be separated. For this, various methods of correcting non-selective absorption are used, for example, based on the Zeeman effect [1].
- the device includes optically coupled elements: a radiation source with a wavelength corresponding to the resonant absorption of the element, the content of which in the sample is measured; first polarizer, optomodulator, second polarizer, phase plate; an atomizer located in a constant magnetic field; a compensator providing depolarization of the beam due to an additional compensating phase shift; monochromator, radiation receiver; as well as a system for recording and processing a signal, electrically connected to a radiation receiver and synchronized with an optomodulator.
- the operator Before starting analysis using a prototype, the operator includes a radiation source with a wavelength corresponding to the resonant absorption of the element, the content of which in the sample is measured, and also sets the monochromator to the resonant wavelength of the element being determined.
- a beam of radiation from the source passing through the first polarizer, optomodulator, second polarizer and phase plate in series, acquires modulation by the state of polarization (with the frequency of the optomodulator) and amplitude (with the double frequency of the optomodulator).
- the radiation beam is directed through the atomizer, into which the operator introduces the determined sample.
- the sample decomposes to the state of atomic vapor. Due to the fact that a constant magnetic field is created inside the atomizer, due to the Zeeman effect, the cloud of an atomized sample acquires polarization properties (it absorbs radiation of different polarization to varying degrees). Therefore, after passing through the atomizer, polarization modulation of the radiation will lead to additional intensity modulation.
- the monochromator transmits radiation of the resonant wavelength of the element being determined for further registration with a radiation receiver. Then, using a signal recording and processing system synchronized with the optodulator, harmonics with the optododulator oscillation frequency and double frequency are extracted from the electric signal coming from the radiation receiver and their amplitudes are measured. Since the electric signal from the radiation receiver depends on the polarization of the incident radiation, for correct measurements, it is necessary to depolarize the radiation before recording it.
- the prototype uses a compensator, introducing an additional compensating phase shift, depending on the wavelength of the element being determined. The adjustment of the compensator, which provides the phase shift necessary for compensation, is performed manually by the operator. After adjusting the compensator, the operator introduces the determined sample into the atomizer and measures the amplitudes of the harmonics from which the value of the analytical signal is proportional to the mass of the element being determined in the sample.
- the prototype has two drawbacks.
- the first is that the compensator requires manual adjustment during the transition from measuring one element to another element, since its adjustment, which ensures depolarization of radiation, depends on the wavelength. This action requires operator intervention, and therefore increases the analysis time, makes it difficult to automate measurements and, if the operator acts incorrectly, can lead to measurement errors.
- Another disadvantage of the prototype is the large radiation loss at the entrance slit of the monochromator, due to the fact that the radiation beam at the entrance to the monochromator has a round profile, while the slit itself has an elongated shape.
- the mismatch between the beam profiles and the entrance slit of the monochromator only a small part of the radiation enters the monochromator, and after recording the radiation by the receiver, it forms an analytical signal. This circumstance limits the spectrometer luminosity.
- the objective of the invention is to increase the speed of the spectrometer, reduce analysis time by automating the measurement process, as well as eliminate the potential source of measurement errors, as a result of incorrect operator actions when manually adjusting the compensator.
- the problem is achieved in that in an atomic absorption spectrometer based on the Zeeman effect, containing optically coupled radiation source with a wavelength corresponding to the resonant absorption of the element being determined, a polarizer, optomodulator, phase plate and atomizer located in a constant magnetic field; optically coupled monochromator and radiation receiver; a system for recording and processing a signal electrically connected to a radiation receiver and synchronized with an optomodulator; A radiation conversion device was introduced that was optically coupled to an atomizer and a monochromator, made in the form of optically conjugated a second polarizer and a fiber bundle with a variable profile, and the input end of the fiber bundle was given a shape that coincided with the profile of the radiation beam section, and the output end was given an elongated shape and it was aligned with an entrance slit of a monochromator.
- FIG. 1 Scheme of the proposed atomic absorption spectrometer based on the Zeeman effect.
- FIG. 2 Scheme of the radiation conversion device.
- FIG. 3 Scheme for the formation of analytical signals in an atomic absorption spectrometer based on the Zeeman effect.
- FIG. 1 A diagram of an atomic absorption spectrometer based on the Zeeman effect is shown in Figure 1.
- the spectrometer contains optically coupled elements: a radiation source 1 with a wavelength corresponding to the resonant absorption of the element whose content is measured in the sample, polarizer 2, optomodulator 3, phase plate 4 and an atomizer 5 located in a magnetic field created by magnets 6; a radiation conversion device 7, a monochromator 8 and a radiation receiver 9; as well as a system for recording and processing a signal 10, electrically connected to a radiation receiver and synchronized with an opto-modulator.
- a diagram of the radiation conversion device 7 shown in FIG. 2 contains optically coupled elements: a second polarizer 1 1 and a fiber bundle 12.
- the fiber bundle 12 is made with a variable profile due to the fact that its input end face is placed in the input frame 13, which is shaped coinciding with the profile of the cross section of the radiation beam, and the output end face is placed in the output frame 14 of an elongated shape.
- the output end of the fiber bundle is aligned with the input slit of the monochromator 8,
- a resonant radiation source can be, for example, a hollow cathode spectral lamp or an electrodeless spectral lamp.
- elements similar to those used in the prototype or similar can be used as a polarizer 2, an optical modulator 3, a phase plate 4, a monochromator 8, a radiation detector 9, and a signal recording and processing system 10.
- the second polarizer can be implemented in various ways:
- either the function of the polarizer can be performed by cutting a beam of optical fibers carried out at a Brewster angle with respect to the incident radiation beam.
- Optomodulator 3 performs a periodic phase shift, as a result of which, after passing through the optomodulator, the radiation becomes modulated by polarization (there is a periodic transformation of the polarization state of the beam from linear to elliptical, in the particular case circular).
- An optomodulator can be implemented, for example, in the form of a phase plate having a time-varying phase shift due to alternating mechanical stress.
- the radiation is passed through a phase plate 4, the axis of which is oriented parallel to the selected a direction that converts linear polarization to circular and circular to linear.
- the radiation beam acquires a modulation of the polarization state, characterized by a periodic change of the following states:
- the radiation thus formed is passed through atomizer 5.
- a sample is preliminarily introduced into the atomizer, which, under the influence of physical factors realized in the atomizer (for example, high temperature, exposure to a flame or plasma), turns into a cloud of atomic vapor.
- magnets 6 creates a magnetic field. The magnets are oriented so that the magnetic lines of force are parallel to the selected direction.
- the mutual arrangement of the radiation beam and magnetic field lines described above leads to the realization of the transverse Zeeman effect, which manifests itself in the fact that the absorption resonance line splits into a number of ⁇ and ⁇ components (Zeeman effect), and the ⁇ and ⁇ components absorb linearly polarized radiation whose polarization direction is parallel or perpendicular to the direction of the magnetic lines, respectively.
- One of the ⁇ -components does not shift relative to the wavelength of the undigested line (the wavelength of this line is equal to the wavelength of the undigested absorption line), while the ⁇ -components shift relative to the wavelength of the unsplit line, and this shift increases with increasing magnetic field strength.
- the ⁇ -components shift, and as they shift, the effect of resonance absorption of radiation is weakened for them (with a sufficiently strong field, the line shift reaches such a level that resonance absorption ceases to be realized).
- resonant absorption will occur regardless of the magnetic field strength. Since the ⁇ and ⁇ components absorb radiation with different orientations of the plane of polarization, this will lead to the appearance of intensity modulation: at those times when the polarization of the radiation is linear and the direction of polarization is parallel to the direction of the magnetic lines of force, the resonance radiation is absorbed by the ⁇ components of the absorption line.
- the resonance absorption is weakened (or absent), because The ⁇ components are shifted relative to the emission line, and the TC components cannot absorb radiation with a given polarization.
- the amplitude of the oscillations will be determined by the radiation intensity and the value of atomic absorption, depending on the concentration of the element being determined.
- the radiation After passing through the atomizer, the radiation enters the radiation conversion device 7.
- the second polarizer 11 included in the radiation conversion device be oriented at an angle of 45 degrees with respect to the direction selected as the reporting system.
- the optical radiation After passing through the second polarizer 11, the optical radiation will acquire additional modulation in intensity, with minima at times when the polarization is linear and maxima at times when the polarization is circular, as shown in figure 3, i.e. with a double frequency compared to the oscillation frequency of the optomodulator. Moreover, the amplitude of the oscillations will depend on the radiation intensity and the total (selective and non-selective absorption).
- the bundle of optical fibers 12 following the second polarizer 11 depolarizes the radiation beam due to numerous reflections in the optical fibers, and the depolarization effect is independent of the wavelength and does not require any action on the part of the operator.
- a fiber bundle is attached with a profile that provides the best coordination between the radiation beam and the entrance slit of the monochromator. This is achieved by the fact that the input end of the fiber bundle is given a round shape, coinciding with the profile of the radiation beam, and the output end is given an elongated shape and it is combined with the entrance slit of the monochromator.
- the radiation beam after passing the radiation conversion device 7, the radiation beam will have intensity modulation with two harmonics: with the frequency of the optomodulator and twice the frequency of the optomodulator and be depolarized.
- the second polarizer can be implemented not only as a separate device (as in the prototype), but, for example, it can be combined into one unit with the frame of the fiber optic cable bundle, and the function of the second polarizer can be performed by cutting the fiber cable bundle at an angle of Brewster to incident beam of radiation.
- the radiation depolarized and modulated in intensity After passing through the radiation conversion device, the radiation depolarized and modulated in intensity enters the monochromator 8, which selects a spectral region near the resonance absorption line.
- the radiation emitted by the monochromator is recorded using the radiation receiver 9.
- the signal recording and processing system 10 synchronized with the optomodulator, harmonics with the oscillation frequency of the optomodulator and a double frequency are extracted from the electric signal coming from the radiation receiver, their amplitudes are measured and found the value of the analytical signal proportional to the mass of the determined element in the sample.
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- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- General Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
La présente invention relève du domaine de la construction d'instruments analytiques et peut être utilisée pour la détermination de la teneur en éléments chimiques des échantillons de différents types par procédé de spectrométrie à absorption atomique. L'objectif visé par l'invention est d'augmenter la force lumineuse du spectromètre, la réduction du temps d'analyse grâce à l'automatisation du processus de mesure et l'élimination d'une source potentielle d'erreurs de mesure causées par des actions incorrectes de l'opérateur lors du réglage manuel du compensateur; l'objectif visé est réalisé grâce au fait que le spectromètre à absorption atomique utilisant l'effet de Zeeman comprend une source de rayonnement à longueur d'onde correspondant à l'absorption par résonance de l'élément déterminé, un polariseur, un modulateur optique, une plaquette de phase et un atomiseur, disposé dans le champ magnétique permanent, tous reliés optiquement; un monochromateur et un récepteur de rayonnement reliés optiquement; un système d'enregistrement et de traitement de signaux relié électriquement au récepteur de rayonnement et synchronisé avec le modulateur optique; un dispositif de conversion du rayonnement couplé optiquement à l'atomiseur et au monochromateur qui se présente comme un deuxième polariseur et un câble de guides d'ondes lumineuses couplés optiquement, ledit câble possédant un profil variable; on a conféré à l'extrémité du câble de guide d'ondes lumineuses une forme coïncidant avec le profil de couple du faisceau de rayonnement, et à l'extrémité de sortie une forme allongée; ce dernier est mis en correspondance avec la fente du monochromateur. -
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EA201401280A EA027448B1 (ru) | 2012-06-18 | 2013-05-30 | Атомно-абсорбционный спектрометр, основанный на эффекте зеемана |
CN201380032132.6A CN104520697B (zh) | 2012-06-18 | 2013-05-30 | 基于塞曼效应的原子吸收光谱仪 |
UAA201413184A UA109621C2 (uk) | 2012-06-18 | 2013-05-30 | Атомно-абсорбційний спектрометр, оснований на ефекті зеємана |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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RU2012126492/28A RU2497101C1 (ru) | 2012-06-18 | 2012-06-18 | Атомно-абсорбционный спектрометр, основанный на эффекте зеемана |
RU2012126492 | 2012-06-18 |
Publications (2)
Publication Number | Publication Date |
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WO2013191582A2 true WO2013191582A2 (fr) | 2013-12-27 |
WO2013191582A3 WO2013191582A3 (fr) | 2014-02-27 |
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PCT/RU2013/000409 WO2013191582A2 (fr) | 2012-06-18 | 2013-05-30 | Spectromètre à absorption atomique utilisant l'effet de zeeman |
Country Status (5)
Country | Link |
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CN (1) | CN104520697B (fr) |
EA (1) | EA027448B1 (fr) |
RU (1) | RU2497101C1 (fr) |
UA (1) | UA109621C2 (fr) |
WO (1) | WO2013191582A2 (fr) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
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CN104977283B (zh) * | 2015-07-02 | 2018-12-28 | 北京市理化分析测试中心 | 恒定磁场置于原子化器的塞曼效应原子荧光光谱仪 |
CN105047055A (zh) * | 2015-08-24 | 2015-11-11 | 云南师范大学 | 一种永磁式塞曼效应实验仪及其实验原理 |
FR3082946B1 (fr) * | 2018-06-25 | 2020-09-04 | Centre Nat Rech Scient | Procede et systeme de mesure de la chiralite de molecules |
CN111537488A (zh) * | 2020-06-08 | 2020-08-14 | 山西中谱能源科技有限公司 | 一种利用塞曼荧光消除汞元素测量干扰的装置及测量方法 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4457623A (en) * | 1981-02-23 | 1984-07-03 | The Perkin-Elmer Corporation | Atomic absorption spectrophotometer providing background correction using the Zeeman effect |
GB2285505A (en) * | 1994-01-11 | 1995-07-12 | Varian Australia | Amplitude modulation of carrier wave by atomic absorption signal |
RU2421708C2 (ru) * | 2009-08-28 | 2011-06-20 | Общество с ограниченной ответственностью "ВИНТЕЛ" | Способ определения содержания металлов в пробах методом электротермической атомно-абсорбционной спектрометрии и устройство для его осуществления |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6051054B2 (ja) * | 1980-09-24 | 1985-11-12 | 株式会社日立製作所 | ゼ−マン原子吸光光度計 |
DE3113678A1 (de) * | 1981-04-04 | 1982-10-14 | Bodenseewerk Perkin-Elmer & Co GmbH, 7770 Überlingen | Vorrichtung zur atomabsorptionsanalyse einer probe |
JPS60187844A (ja) * | 1984-03-07 | 1985-09-25 | Hitachi Ltd | 偏光ゼ−マン原子吸光分光光度計 |
JPH0672841B2 (ja) * | 1988-03-04 | 1994-09-14 | 株式会社日立製作所 | 原子吸光分光光度計 |
DE3809215A1 (de) * | 1988-03-18 | 1989-10-05 | Bodenseewerk Perkin Elmer Co | Elektromagnet fuer ein atomabsorptions-spektrometer |
RU2007705C1 (ru) * | 1991-06-26 | 1994-02-15 | Акционерное общество "Научно-технический комплекс Союзцветметавтоматика" | Атомно-абсорбционный анализатор с модуляцией коэффициента поглощения |
RU6906U1 (ru) * | 1997-08-25 | 1998-06-16 | Сергей Евгеньевич Шолупов | Атомно-абсорбционный ртутный анализатор |
JP3960256B2 (ja) * | 2003-04-25 | 2007-08-15 | 株式会社島津製作所 | 原子吸光分光光度計 |
CN1270174C (zh) * | 2004-04-16 | 2006-08-16 | 广东省测试分析研究所 | 一种恒定磁场反塞曼效应原子吸收分析的方法及其装置 |
RU2373522C1 (ru) * | 2008-05-26 | 2009-11-20 | Общество с ограниченной ответственностью "ВИНТЕЛ" | Атомно-абсорбционный ртутный анализатор |
CN201368848Y (zh) * | 2009-02-13 | 2009-12-23 | 上海光谱仪器有限公司 | 交直流两用塞曼效应原子吸收背景校正系统 |
CN201522427U (zh) * | 2009-09-30 | 2010-07-07 | 合肥皖仪科技有限公司 | 一种新型双灯双原子化器一体化原子吸收分光光度计 |
-
2012
- 2012-06-18 RU RU2012126492/28A patent/RU2497101C1/ru active
-
2013
- 2013-05-30 UA UAA201413184A patent/UA109621C2/ru unknown
- 2013-05-30 WO PCT/RU2013/000409 patent/WO2013191582A2/fr active Application Filing
- 2013-05-30 CN CN201380032132.6A patent/CN104520697B/zh active Active
- 2013-05-30 EA EA201401280A patent/EA027448B1/ru not_active IP Right Cessation
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---|---|---|---|---|
US4457623A (en) * | 1981-02-23 | 1984-07-03 | The Perkin-Elmer Corporation | Atomic absorption spectrophotometer providing background correction using the Zeeman effect |
GB2285505A (en) * | 1994-01-11 | 1995-07-12 | Varian Australia | Amplitude modulation of carrier wave by atomic absorption signal |
RU2421708C2 (ru) * | 2009-08-28 | 2011-06-20 | Общество с ограниченной ответственностью "ВИНТЕЛ" | Способ определения содержания металлов в пробах методом электротермической атомно-абсорбционной спектрометрии и устройство для его осуществления |
Non-Patent Citations (1)
Title |
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GANEEV A. A. ET AL.: 'Zeemanovskaya modulyatsionnaya polyarizatsionnaya spektrometriya kak varian atomno-absorbtsionnogo analiza: vozmozhnosti i ogranicheniya.' ZHURNAL ANALITICHESKOI KHIMII vol. 51, no. 8, 1996, pages 855 - 864 * |
Also Published As
Publication number | Publication date |
---|---|
WO2013191582A3 (fr) | 2014-02-27 |
UA109621C2 (uk) | 2015-09-10 |
CN104520697A (zh) | 2015-04-15 |
RU2497101C1 (ru) | 2013-10-27 |
EA027448B1 (ru) | 2017-07-31 |
CN104520697B (zh) | 2017-03-22 |
EA201401280A1 (ru) | 2015-03-31 |
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