Instrumentation and Principles of Flame Spectrometry Automatic Background Correction for Multichannel Flame Spectrometer

1956 ◽  
Vol 28 (7) ◽  
pp. 1066-1069 ◽  
Author(s):  
Marvin. Margoshes ◽  
B. L. Vallee
Keyword(s):  
Background Correction ◽  
Flame Spectrometry

scholarly journals Influence of Saturation Phenomena on Laser-Excited Atomic Fluorescence Flame Spectrometry

1973 ◽  
Vol 28 (2) ◽  
pp. 273-279
Author(s):  
J. Kühl ◽  
S. Neumann ◽  
M. Kriese
Keyword(s):  
Power Density ◽  
Laser Power ◽  
Atomic Emission ◽  
Equation Model ◽  
Laser Power Density ◽  
Atomic Level ◽  
Dye Laser ◽  
Atomic Fluorescence ◽  
Emission Flame ◽  
Flame Spectrometry

Using a simple rate equation model, the laser power density Ic necessary to reach 50% of the saturation limited population of the excited atomic level under typical flame conditions is calculated. For Na atoms aspirated into the flame a saturating power density for irradiation with a narrow dye laser line (bandwidth 0.033 Å) of Ic ~ 0.4 kW/cm2 was determined. With the aid of a dye laser with an appropriate laser power density, analytical curves for Na were measured yielding a detection limit of 0.2 ng/ml. This sensitivity is comparable with the best results obtained by atomic emission flame spectrometry.

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.

Some causes of bending of analytical curves in atomic emission flame spectrometry

1966 ◽  
Vol 36 ◽  
pp. 42-56 ◽  
Author(s):  
T.J. Vickers ◽  
L.D. Remington ◽  
J.D. Winefordner
Keyword(s):  
Atomic Emission ◽  
Emission Flame ◽  
Flame Spectrometry
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