Longitudinal a.c. Zeeman AAS with a transverse heated graphite furnace

Loos-Vollebregt, M.T.C. de; Galan, L. de; Uffelen, J.W.M. van

doi:10.1016/0584-8547(88)80159-9

Cited by 17 publications

(2 citation statements)

References 15 publications

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“…The longitudinal Zeeman-efffect BC system presented in Figure 9(b) has been described by Liddell and Brodie, (17) De Loos-Vollebregt et al, (20) and Shuttler (21) and is also commercially available. A transverse heated atomizer is placed in the longitudinal magnetic field and there is no polarizer in the optical system (see Section 3.2).…”

Section: Instrumentationmentioning

confidence: 99%

Background Correction Methods in Atomic Absorption SpectrometryUpdate based on the original article by Margaretha T.C. de Loos‐Vollebregt,Encyclopedia of Analytical Chemistry, © 2000, John Wiley & Sons, Ltd.

Loos-Vollebregt

2013

Encyclopedia of Analytical Chemistry

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Atomic absorption spectrometry (AAS) is based on the absorption of element‐specific primary source radiation by analyte atoms. If part of the radiation is absorbed by molecules or lost owing to scattering, a higher gross absorbance is measured. The difference between the net absorption of the analyte atoms and the measured gross absorbance is called background absorbance . Background absorption and scattering effects have much more serious effects on the results produced in electrothermal atomic absorption spectrometry (ETAAS) than flame atomic absorption spectrometry (FAAS). The amount of incident light deflected or absorbed by nonatomic species must be measured to obtain the correct net absorbance of the analyte atoms only. Perfect background correction (BC) can be obtained only when the background absorbance measurement corresponds exactly in space, time, and wavelength with the atomic absorbance measurement. Since exact coincidence of all three parameters is obviously impossible, it is customary to give priority to the equality in space and to make the difference in time and/or wavelength as small as possible. Although molecular absorption and radiation scattering are both broadband phenomena, there is no spectral range where constant background attenuation can be guaranteed. In all BC systems, two measurements are made. The total or gross absorbance is measured at the wavelength of the atomic absorption line, and the background attenuation is then subtracted to obtain the analyte absorbance. There are several ways in which the nonatomic absorption at the resonance wavelength can be estimated, including continuum‐source (CS) or deuterium‐lamp (D 2 ‐lamp) BC, Zeeman‐effect BC, and pulsed‐lamp or Smith–Hieftje BC correction methods. The principle of each method, the instrumentation, and applications are discussed. D 2 ‐lamp BC is widely used in FAAS and ETAAS. Pulsed‐lamp BC is sometimes used in FAAS but more often in ETAAS. Zeeman‐effect BC is only used in ETAAS.

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Section: Instrumentationmentioning

confidence: 99%

Background Correction Methods in Atomic Absorption SpectrometryUpdate based on the original article by Margaretha T.C. de Loos‐Vollebregt,Encyclopedia of Analytical Chemistry, © 2000, John Wiley & Sons, Ltd.

Loos-Vollebregt

2013

Encyclopedia of Analytical Chemistry

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“…The aim of the present paper is to study the transformation functions of atomic-absorption spectrometers with electrothermal atomization and Zeeman correction of the spectral interferences [4,5] and consider the possibility of application of the transformation functions of atomic-absorption spectrometers for the elemental analysis of actual samples.…”

Section: Introductionmentioning

confidence: 99%

Transformation Functions in the Electrothermal Atomic-Absorption Spectrometry

Sadagov¹,

Levin

Biryukova³

2021

Meas Tech

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We consider the problem of calibration of analytical instruments and the procedure of analysis in the case where the composition or origin of the analyzed sample is unknown. We study the transformation functions of a Zeeman atomic-absorption spectrometer with electrothermal atomization. We propose a method for the determination of the two-parameter transformation function of the spectrometer based on the use of a single calibration sample and consider the possibility of measuring of the analyte concentration in the actual sample with the help of the refi ned transformation function of the spectrometer.

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Background Correction Methods in Atomic Absorption Spectroscopy

Loos-Vollebregt¹

2000

Encyclopedia of Analytical Chemistry

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Atomic absorption spectroscopy (AAS) is based on the absorption of element‐specific primary source radiation by analyte atoms. If part of the radiation isabsorbed by molecules or lost due to scattering, a higher gross absorbance is measured. The difference between the net absorption of the analyte atoms and the measured gross absorbance is called background absorbance. Background absorption and scattering effects have much more serious effects on the results produced in electrothermal atomization atomic absorption spectroscopy (ETAAS) than flame atomic absorption spectroscopy (FAAS). The amount of incident light deflected or absorbed by nonatomic species must be measured to obtain the correct, net absorbance of the analyte atoms only. Perfect background correction can be obtained only when the background absorbance measurement corresponds exactly in space, time and wavelength with the atomic absorbance measurement. Since exact coincidence of all three parameters is obviously impossible, it is customary to give priority to the equality in space and to make the difference in time and/or wavelength as small as possible. Although molecular absorption and radiation scattering are both broad‐band phenomena, there is no spectral range where constant background attenuation can be guaranteed. In all background correction systems two measurements are made. The total or gross absorbance is measured at the wavelength of the resonance line emitted by the hollow cathode lamp (HCL). The background attenuation is then subtracted from the measured analyte absorbance to obtain the analyte absorbance. There are several ways in which the nonatomic absorption at the resonance wavelength can be estimated, including two‐line background correction, continuum‐source or deuterium lamp background correction, Zeeman background correction, pulsed lamp or Smith–Hieftje background correction and wavelength‐modulation correction methods. The principle of each method, the instrumentation and applications are discussed. Continuum‐source background correction is widely used in FAAS and ETAAS, whereas Zeeman background correction and pulsed lamp background correction are often preferred in ETAAS.

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Longitudinal a.c. Zeeman AAS with a transverse heated graphite furnace

Cited by 17 publications

References 15 publications

Background Correction Methods in Atomic Absorption SpectrometryUpdate based on the original article by Margaretha T.C. de Loos‐Vollebregt,Encyclopedia of Analytical Chemistry, © 2000, John Wiley & Sons, Ltd.

Background Correction Methods in Atomic Absorption SpectrometryUpdate based on the original article by Margaretha T.C. de Loos‐Vollebregt,Encyclopedia of Analytical Chemistry, © 2000, John Wiley & Sons, Ltd.

Transformation Functions in the Electrothermal Atomic-Absorption Spectrometry

Background Correction Methods in Atomic Absorption Spectroscopy

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