Measurement of microsamples in atomic emission and atomic fluorescence flame spectrometry

1972 ◽  
Vol 60 (1) ◽  
pp. 55-64 ◽  
Author(s):  
J. R. Sarbeck ◽  
P. A. St. John ◽  
J. D. Winefordner
Keyword(s):  
Atomic Emission ◽  
Atomic Fluorescence ◽  
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.

Comparison of Nebulization-Spray Chamber Arrangements for Atomic Fluorescence and Atomic Emission Flame Spectrometry

1981 ◽  
Vol 35 (2) ◽  
pp. 149-152 ◽  
Author(s):  
J. J. Horvath ◽  
J. D. Bradshaw ◽  
J. D. Winefordner
Keyword(s):  
Detection Limits ◽  
Atomic Emission ◽  
Ultrasonic Nebulizer ◽  
Atomic Fluorescence ◽  
Batch Type ◽  
Uptake Rates ◽  
Pneumatic Nebulizer ◽  
Emission Flame ◽  
Flame Spectrometry ◽  
Solution Uptake

Ten different commercial atomic absorption nebulizer-chamber systems with a capillary burner and three laboratory-constructed ultrasonic nebulizer chamber systems with a miniflame burner are compared with respect to solution uptake rates, concentrational and absolute detection limits, efficiencies of nebulization, and common flame spectrometric interferences. Measurements of both flame atomic emission (Sr, Ca, K, Na) and flame atomic fluorescence (Mg, Cu, Pb) were performed for all cases. The ultrasonic and pneumatic nebulizer systems resulted in about the same concentrational detection limits, but the former resulted in ∼102X lower absolute detection limits. The batch type ultrasonic nebulizer gave much higher nebulization efficiencies than the continuous flow ultrasonic nebulizer or any of the pneumatic nebulizer systems. Chemical interferences were approximately the same in all nebulizer-burner systems. Nebulizer chambers with a J-bead resulted in lower detection limits than the same systems without J-beads.

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

A New Optical System for Flame Spectroscopy with Special Reference to Thermally Assisted Anti-Stokes Fluorescence Applications

1971 ◽  
Vol 25 (1) ◽  
pp. 57-60 ◽  
Author(s):  
P. Benetti ◽  
N. Omenetto ◽  
G. Rossi
Keyword(s):  
Detection Limits ◽  
Total Consumption ◽  
Atomic Fluorescence ◽  
Flame Emission ◽  
Analytical Importance ◽  
Primary Focus ◽  
Spherical Mirrors ◽  
Anti Stokes ◽  
Flame Spectrometry ◽  
Flame Position

A new optical setup for increasing the intensity of atomic fluorescence flame spectrometry is presented. The arrangement consists of two concave spherical mirrors and an elliposidal mirror whose primary focus is located at the flame position, and secondary at the entrance slit of the monochromator. Approximately 10 times gain in the measured intensities was obtained. The system is also useful for flame emission work, for which about five times gain was observed. With a low background flame such as the air–H2 for the N2−H2 diffusion flame and 400 µ slits, calcium can be detected at the level of 0.005 µg/ml. Moreover, the observed thermally assisted anti-Stokes fluorescence of In and Ga can be of analytical importance since the detection limits with a total consumption burner and the air-H2 flame were found to be 0.015 and 0.02 µg/ml, respectively. Detection limits in atomic fluorescence for Cr, Tl, In, and Fe are also presented.

Non-linear optical behavior in atomic fluorescence flame spectrometry

1973 ◽  
Vol 28 (8) ◽  
pp. 289-300 ◽  
Author(s):  
N. Omenetto ◽  
P. Benetti ◽  
L.P. Hart ◽  
J.D. Winefordner ◽  
C.Th.J. Alkemade
Keyword(s):  
Atomic Fluorescence ◽  
Non Linear ◽  
Linear Optical ◽  
Optical Behavior ◽  
Flame Spectrometry

Simultaneous multi-element atomic emission flame spectrometry with an image vidicon detector

1974 ◽  
Vol 69 (2) ◽  
pp. 455-460 ◽  
Author(s):  
D.O. Knapp ◽  
N. Omenetto ◽  
L.P. Hart ◽  
F.W. Plankey ◽  
J.D. Winefordner
Keyword(s):  
Atomic Emission ◽  
Emission Flame ◽  
Flame Spectrometry
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