Simple Demountable Hollow Cathode for Atomic Absorption Spectroscopy

1968 ◽  
Vol 22 (3) ◽  
pp. 192-194 ◽  
Author(s):  
R. E. Popham ◽  
W. G. Schrenk
Keyword(s):  
Atomic Absorption ◽  
Absorption Spectroscopy ◽  
Hollow Cathode ◽  
Atomic Absorption Spectroscopy ◽  
Detection Limits ◽  
Data Detection ◽  
Hollow Cathodes

A simple demountable hollow cathode for atomic absorption spectroscopy has been developed which involves very little cost and is simple to construct. The performance of the demountable lamp was compared with commercial lamps for the elements zinc, chromium, and nickel. The lamps were found to be almost identical with respect to stability, precision of data, detection limits, and analytically useful ranges for these three elements. It is felt that use of this demountable hollow cathode can greatly extend the number of elements which can be determined by atomic absorption for a laboratory unable to invest in commercial hollow cathodes.

Characteristics of Capillary Discharge Lamp Developed for Determination of S, P, Se, and as by Flame Atomic Absorption Spectroscopy

1985 ◽  
Vol 39 (3) ◽  
pp. 519-526 ◽  
Author(s):  
M. D. Lowe ◽  
M. M. Sutton
Keyword(s):  
Atomic Absorption ◽  
Absorption Spectroscopy ◽  
Hollow Cathode ◽  
Atomic Absorption Spectroscopy ◽  
Detection Limits ◽  
Capillary Discharge ◽  
Operating Conditions ◽  
Flame Atomic Absorption Spectroscopy ◽  
Discharge Lamp ◽  
Flame Atomic Absorption

The characteristics of a capillary discharge lamp, developed as a spectral source for the measurement of sulphur, phosphorus, selenium, and arsenic concentrations by flame atomic absorption spectroscopy, have been determined. Atomic spectral lines for each of the elements were produced when flowing mixtures of helium and vapor of the element, or a compound of the element, were passed through a quartz capillary discharge tube. Absorbance-concentration relationships, together with analytical sensitivities and detection limits, were obtained for sulphur, phosphorus, selenium, and arsenic with the use of a modified flame atomic absorption spectrophotometer, the optical system of which was purged with argon when necessary. The capillary discharge lamp readings were compared with measurements made under similar operating conditions with selenium and arsenic hollow cathode lamps. The capillary discharge lamp results were also compared with those obtained by other workers using electrodeless discharge lamps, modified hollow cathode lamps, and controlled temperature-gradient lamps. It was evident that the capillary discharge lamp possesses performance characteristics which make it potentially suitable as a spectral source for atomic absorption spectroscopy. Sensitivities and detection limits obtained with the use of this novel lamp were similar to those reported for other spectral sources.

On the Importance of Spectral Interferences in Atomic Absorption Spectroscopy

1975 ◽  
Vol 29 (6) ◽  
pp. 470-477 ◽  
Author(s):  
R. J. Lovett ◽  
D. L. Welch ◽  
M. L. Parsons
Keyword(s):  
Atomic Absorption ◽  
Absorption Spectroscopy ◽  
Atomic Absorption Spectroscopy ◽  
Detection Limits ◽  
Direct Absorption ◽  
Transition Elements ◽  
Spectral Interferences ◽  
Spectral Bandpass ◽  
Analysis Line ◽  
Source Emission

Various types of spectral interferences in atomic absorption spectroscopy were investigated. Of particular concern were interferences in which atomic electronic processes are a problem. Source emission of multiplets and other radiation near the analysis line can cause nonlinear analytical curves and poor detection limits. Direct absorption spectral overlaps were found to be of importance in some analyses, particularly for transition elements. Comprehensive lists of observed and predicted spectral interferences are presented. It is concluded that spectral interferences may be of more importance than previously supposed in routine analytical situations. Further, there should be an optimal spectral bandpass for each analytical transition.

Performance of Lead Hollow Cathode Lamps for Atomic Absorption Spectroscopy

1965 ◽  
Vol 19 (3) ◽  
pp. 65-68 ◽  
Author(s):  
Walter Slavin ◽  
David C. Manning
Keyword(s):  
Detection Limit ◽  
Aqueous Solutions ◽  
Atomic Absorption ◽  
Absorption Spectroscopy ◽  
Hollow Cathode ◽  
Atomic Absorption Spectroscopy ◽  
Light Energy ◽  
Lamp Current ◽  
Spectral Bandpass

The use of neon as filler gas in lead hollow cathode lamps provides considerably more light energy than was available with earlier lamps. The spectroscopic performance of these lamps is reported as a function of gas fill, lamp current and spectral bandpass The detection limit for the lead analysis is shown to be 0.03 ppm lead in aqueous solutions with the new lamps and particular atomic absorption instrumentation

Recent Trends in Analytical Atomic Absorption Spectroscopy

1969 ◽  
Vol 23 (5) ◽  
pp. 421-433 ◽  
Author(s):  
Walter Slavin ◽  
Sabina Slavin
Keyword(s):  
Atomic Absorption ◽  
Absorption Spectroscopy ◽  
Atomic Absorption Spectroscopy ◽  
Detection Limits ◽  
Resonance Spectroscopy ◽  
Atomic Fluorescence ◽  
The Past ◽  
Analytical Applications ◽  
Flame Emission ◽  
Recent Trends

Atomic absorption spectroscopy is reviewed especially as to the effect of developments in the past few years on analytical applications. Sources and sampling devices are given special attention. Atomic absorption, flame emission, and atomic fluorescence are compared as to their detection limits and their applicability to analysis. It is shown that the three methods are in many ways complementary rather than competing. The potentialities of resonance spectroscopy are examined and instrument systems utilizing resonance methods are described.

A Comparison Study of Detection Limits Using Flame-Emission Spectroscopy with the Nitrous Oxide—Acetylene Flame and Atomic-Absorption Spectroscopy

1971 ◽  
Vol 25 (6) ◽  
pp. 660-663 ◽  
Author(s):  
Gary D. Christian ◽  
Fredric J. Feldman
Keyword(s):  
Nitrous Oxide ◽  
Atomic Absorption ◽  
Absorption Spectroscopy ◽  
Atomic Absorption Spectroscopy ◽  
Emission Spectroscopy ◽  
Detection Limits ◽  
Operating Conditions ◽  
Flame Emission ◽  
Integration Techniques ◽  
Minimum Detection Limits

The minimum detection limits using flame-emission spectroscopy with the nitrous oxide–acetylene flame and using atomic-absorption spectroscopy were determined under optimum instrumental and flame-operating conditions for 68 elements, using the same nebulizer system, the same instrument, and signal integration techniques. Based on these studies, 27 elements show equal detectability by the two methods, 15 are more sensitive by flame emission, and 26 are more sensitive by atomic absorption. Results are compared and discussed with respect to theoretical prediction.

Sign in / Sign up

Export Citation Format

Share Document