Abstract

Spectrochemical spark results can appreciably be improved if each individual spark is permitted to strike fresh material. The tape machine developed by Danielsson (<i>1</i>) achieves this by drawing an adhesive tape with a powdered sample on it, through the spark at a speed of 21 cm/sec. The Danielsson machine first folds the tape coming from the unused roll in such a way that the central portion of the tape is left open. The tape then passes under a trough containing the sample to be analysed. All excess material not sticking to the central portion of the tape is blown clear before the tape passes through the spark.

The Mercury Arc as a Standard of Ultraviolet Radiation

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J. Opt. Soc. Am. 34(6) 291-301 (1944)

The Carbon Arc as a Radiation Standard*

H. G. MacPherson
J. Opt. Soc. Am. 30(5) 189-194 (1940)

Carbon Arc as a Radiation Standard

M. R. Null and W. W. Lozier
J. Opt. Soc. Am. 52(10) 1156-1162 (1962)

Variable diameter CO₂ laser ring-cutting system adapted to a zoom microscope for applications on polymer tapes

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Carbon Arc in a Controlled Atmosphere as a Radiation Standard*

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J. Opt. Soc. Am. 57(4) 513-516 (1967)