Spectral Background Intensity in dc Arcs as a Reference in Quantitative Analysis

Abstract

The spectral relationships of background radiation and sample composition have been studied for synthetic glasses (2500–3500 Å) and sulfates of alkaline earths (2900–4700 Å) in gas-stabilized dc arcs (15–28 A). The influence of lithium metaborate as a spectrochemical buffer on background radiation and on evaporation of the alkaline earths has been examined. This buffer was found to improve the reproducibility of line intensities. The spectral distribution of the relative background intensity has been determined with the aid of the standard radiation of the carbon anode crater and compared with other authors' results. Electron recombination and molecule continua substantially contribute to continuous radiation. The background intensity was found to be at least as good a reference as an internal standard, particularly because it is applicable for quite a wide spectral range.

Keywords

Direct current arc Spectral-background radiation Buffer Evaporation

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References

Prokofjev

W. K.

, Nachr. Akad. Wiss. UdSSR., Phys. Ser. 14, 660 (1950).

Serim

P. A.

and Ashton

K. H.

, Appl. Spectrosc. 18, 166 (1964).

Harvey

C. E.

, “A Method of Semiquantitative Spectroscopic Analysis” (Applied Research Labs., Glendale, Calif., 1947).

Schrön

, Silikattech. 15, 281 (1964).

Krempl

Z. Anal. Chem. 198, 21 (1963).

Boumans

P. W. J. M.

, Theory of Spectrochemical Excitation (Hilger and Watts, London, 1966), p. 203.

Decker

R. J.

and Eve

D. J.

, Appl. Spectrosc. 22, 13 (1968).

Decker

R. J.

and Eve

D. J.

, Appl. Spectrosc. 22, 263 (1968).

Boumans

P. W. J. M.

and Maessen

, Spectrochim. Acta 23B, 739 (1968).

10.

Schirmer

, Z. Angew. Phys. 13, 56 (1961).

11.

McPherson

H. G.

, J. Opt. Soc. Amer. 30, 189 (1940).

12.

Euler

, Ann. Phys. 11, 203 (1953).

13.

Null

M. R.

and Lozier

W. W.

, J. Opt. Soc. Amer. 52, 1156 (1962).

14.

Krygsman

, Physica 5, 918 (1938).

15.

Annacker

and Mannkopf

, Z. Physik 155, 1 (1959).

16.

Bötticher

Roder

, and Wobig

K. H.

, Z. Physik 175, 480 (1963).

17.

Bötticher

Roder

, and Wobig

K. H.

, Z. Astrophysik 55, 38 (1962).

18.

Kramers

H. A.

, Phil. Mag. 46, 836 (1923).

19.

Unsöld

, Ann. Phys. 33, 607 (1938).

20.

Maecker

and Peters

, Z. Physik 139, 448 (1954).

21.

Neumann

, in Ergebnisse der Plasmaphysik und der Gaselektronik, edited by Rompe

and Steenbeck

(Akademieverlag, Berlin, 1967), Vol. 1, Chap. 9, p. 252.

22.

Finkelnburg

and Peters

, in Handbuch der Physik, edited by Flügge

(Springer, Berlin, 1957), Vol. 28, p. 79.

23.

Ecker

and Kröll

, Phys. Fluids 6, 62 (1963).

24.

Jäger

, dissertation, T. U., München (1968).

25.

Busz

and Finkelnburg

, Z. Physik 139, 216 (1954).

26.

Breene

R. G.

and Nardone

M. C.

, J. Opt. Soc. Amer. 51, 692 (1961).

27.

Finkelnburg

, Kontinuierliche Spektren (Springer, Berlin, 1938).

28.

Finkelnburg

and Hess

, Phys. Z. 39, 666 (1938).

29.

Geltman

, Phys. Rev. 104, 346 (1956).

30.

Schroer

, Z. Anal. Chem. 42, 117 (1939).

31.

Boumans

P. W. J. M.

, IX Colloq. Spectrosc. Int., Lyons 1961, p. 84.

32.

Filo

Matherney

, and Rybarova

, XIV Colloq. Spectrosc. Int., Debrecen, 1967, p. 955.

33.

Semenova

O. P.

, Dokl. Akad. Nauk SSSR 1946, 9.

34.

Boumans

P. W. J. M.

, Spectrochim. Acta 24B, 611 (1969).