Dual Emission Source and Direct-Reading Spectrometer for Microsamples Using Hollow Cathode Or Spark Excitation

Williams, James C.; McDonald, John T.; Davis, Ray L.

doi:10.1080/10739148708543640

Cited by 5 publications

(1 citation statement)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Several spectrometer configurations from this laboratory have been described recently (8,(18)(19)(20). Briefly, a water-cooled hollow cathode discharge source is mounted on an optical rail and the light divided among a series of narrow-band interference filters or monochromators, which are mounted along the rail.…”

Section: Methodsmentioning

confidence: 99%

Application of the hollow cathode discharge emission source to the determination of nonmetals in microsamples

Chen¹,

Williams²

1990

Anal. Chem.

Self Cite

View full text Add to dashboard Cite

The use of the hollow cathode discharge source for the excitation of nonmetals In volume-limited samples is discussed. The effects of breakdown voltage, fill-gas composition, electrode composition, hollow size, sample deposition mode, current, and fill-gas pressure on the emission signal from phosphorus and chlorine are reported. Instrumentation, operation, and sample preparation procedures are described. Temporal profiles of the emission signal from very small samples deposited in the hollow are given for P, Cl, and Se. Detection limits of 9 and 20 pg are reported for P and Cl, respectively.

show abstract

Section: Methodsmentioning

confidence: 99%

Application of the hollow cathode discharge emission source to the determination of nonmetals in microsamples

Chen¹,

Williams²

1990

Anal. Chem.

Self Cite

View full text Add to dashboard Cite

show abstract

Evaluation of the Mini-Hollow Cathode Emission Source for the Analysis of Microsamples

1988

View full text Add to dashboard Cite

The analysis of very small samples by atomic emission from a hollow cathode discharge source is investigated. Subpicogram detection limits of 0.88, 0.72, 0.38, and 0.70 pg are reported for Li, Na, K, and Ca, respectively, by viewing the excitation from a very small hollow with a custom-built multichannel spectrometer. These detection limits are comparable to those from electrothermal atomic absorption, with the additional advantage of the ability to analyze nonmetals. The technique has adequate sensitivity for the analysis of microsamples of physiological fluids for Na, K, and Ca; similar methods may be successful for Mg, P, and Cl, which are of significant physiological interest. Literature of applications of the hollow cathode as an emission source is reviewed. Instrumentation, operation, and sample preparation procedures are described. Temporal profiles of the emission from very small samples deposited in the hollow and working curves are given.

show abstract

Evaluation of the Time-Resolved Spark for the Determination of Sodium, Potassium, and Calcium in Microsamples

McDonald

Williams

1989

Appl Spectrosc

View full text Add to dashboard Cite

This paper describes the evaluation of a time-resolved graphite spark source emission spectrometer built for the purpose of determining Ca, Na, and K in nanoliter volume samples of renal fluid. Subnanogram detection limits calculated from the working curve slope and the uncertainty of the sample signal are reported for Ca, Na and K; these detection limits are some three orders of magnitude higher than the shot noise limit. With the use of Li as an internal standard, working curves from 0 to 1 ng of Na, K, and Ca are shown. System performance data are given, and the utility of the analysis is discussed.

show abstract

Dual Emission Source and Direct-Reading Spectrometer for Microsamples Using Hollow Cathode Or Spark Excitation

Cited by 5 publications

References 3 publications

Application of the hollow cathode discharge emission source to the determination of nonmetals in microsamples

Application of the hollow cathode discharge emission source to the determination of nonmetals in microsamples

Evaluation of the Mini-Hollow Cathode Emission Source for the Analysis of Microsamples

Evaluation of the Time-Resolved Spark for the Determination of Sodium, Potassium, and Calcium in Microsamples

Contact Info

Product

Resources

About