A High Speed Method of Continuous Background Correction in Atomic Absorption Spectrometry

1975 ◽  
Vol 29 (2) ◽  
pp. 154-158 ◽  
Author(s):  
T. H. Donnelly ◽  
A. J. Eccleston
Keyword(s):  
Atomic Absorption Spectrometry ◽  
Atomic Absorption ◽  
High Speed ◽  
Broad Band ◽  
Absorption Spectrometry ◽  
Point Of View ◽  
Background Correction ◽  
Continuum Source ◽  
Continuous Background ◽  
Band Absorption

The need for background correction in atomic absorption spectrometry (AAS), particularly when graphite furnaces are used to generate the atomic vapor, is discussed. It is shown that a Beckman hydrogen arc lamp is suitable as a continuum source from the point of view of noise, extent of its useful broad band absorption, and light intensity for background-corrected absorption (BCA) measurements over the wavelength range examined (200 to 460 nm). The standard method of determining tin present in rock samples as cassiterite, by extraction as the volatile tin iodide, was examined by flameless AAS with BCA. The method corrects for the large nonatomic absorption present, it is rapid, and it enables easier examination of solutions containing low concentrations of tin (detection limit for a 1 g starting sample is ∼1 jug tin).

A High Speed Method of Continuous Background Correction in Atomic Absorption Spectrometry

1975 ◽  
Vol 29 (2) ◽  
pp. 149-153 ◽  
Author(s):  
T. H. Donnelly ◽  
A. J. Eccleston ◽  
R. L. Gully
Keyword(s):  
Atomic Absorption Spectrometry ◽  
Atomic Absorption ◽  
High Speed ◽  
Pulse Generator ◽  
Absorption Spectrometry ◽  
Background Correction ◽  
Light Sources ◽  
Electronic Circuitry ◽  
Continuous Background ◽  
Speed Method

Background correction in atomic absorption spectrometry using high speed electronic circuitry has been developed. Electrical responses are generated from two light sources: an atomic spectral lamp and a modified Beckman hydrogen arc lamp. Repetition rate of the pulses (2.6 msec) was limited by the increasing distortion of the pulse shape. Instantaneous relationships between the various electronic components was established using a synchronizing pulse generator.

A New Background-Correction Method for Atomic Absorption Spectrometry

1983 ◽  
Vol 37 (5) ◽  
pp. 419-424 ◽  
Author(s):  
S. B. Smith ◽  
G. M. Hieftje
Keyword(s):  
Atomic Absorption Spectrometry ◽  
Atomic Absorption ◽  
Broad Band ◽  
Absorption Spectrometry ◽  
Correction Method ◽  
Background Correction ◽  
New Method ◽  
New Technique ◽  
Atomic Line ◽  
Single Beam

A new method is described and tested for background correction in atomic absorption spectrometry. Applicable to flame or furnace atomizers, the method is capable of correcting backgrounds caused by molecular absorption, particulate scattering, and atomic-line overlap, even up to an absorbance value of 3. Like the Zeeman approach, the new method applies its correction very near the atomic line of interest, can employ single-beam optics, and requires no auxiliary source. However, no ancillary magnet or other costly peripherals are required and working curves are single-valued. The new technique is based on the broadening which occurs in a hollow-cathode spectral line when the lamp is operated at high currents. Under such conditions, the absorbance measured for a narrow (atomic) line is low, whereas the apparent absorbance caused by a broad-band background contributor remains as high as when the lamp is operated at conventional current levels. Background correction can therefore be effected by taking the difference in absorbances measured with the lamp operated at high and low currents. The new technique is evaluated in its ability to correct several different kinds of background interference and is critically compared with competitive methods.

A Background Emission Correction System for Atomic Absorption Spectrometry

1981 ◽  
Vol 35 (2) ◽  
pp. 176-181 ◽  
Author(s):  
Frederic G. Dewalt ◽  
John R. Amend ◽  
Ray Woodriff
Keyword(s):  
Atomic Absorption Spectrometry ◽  
Atomic Absorption ◽  
Absorption Spectroscopy ◽  
Atomic Absorption Spectroscopy ◽  
Broad Band ◽  
Absorption Spectrometry ◽  
Broad Band Emission ◽  
Band Emission ◽  
Band Absorption ◽  
Correction System

A simple system which corrects for both broad band absorption and broad band emission in thermally atomized atomic absorption spectroscopy is presented in this article.

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