Specrrochikica Acta. Vol. 39B. No. 5, pp. 747-750. 1984 Printed in Great Britain.

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NEW PATENTS

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Apparatus for detecting the concentration of a gas by measuring the amount of mercury vapor generated when the gas is passed through a mer- curic oxide bed. The apparatus includes a body having a central bore therein with a quartz rod at one end for directing ultraviolet light from a source through the central bore. A second quartz rod at the opposite end of the central bore directs the ultraviolet light to a detector coupled to an electronics circuit for analysis purposes. A fitting coupled to the body has a gas inlet port and a passage from the port to the central bore of the body. The mercuric oxide bed is across the pas- sage so that the gas, in passing through the bed, causes mercury vapor to be generated and to pass into the central bore of the body. The amount of mercury vapor is measured by its spectral absorption in the ultraviolet range when the mercury vapor is in the central bore of the body.

4412131

MONOCHROMATOR FOR CHARGED PARTICLES

Hermann Froitzheim, Aachen, Federal Repub- lic Of Germany assigned to Leybold Heraeus GmbH

A monochromator for charged particles com- prises a premonochromator and a main mono- chromator is tandem with a retarding lens disposed therebetween. The arrangement is suitable for electron energy loss spectrometry due to the high achievable intensities.

4411867

REDUCTION GAS DETECTOR

Clinton R Ostrander

4411524

APPARATUS FOR THE SPECTROMETRIC ANALYSIS OF THE CHEMICAL COMPOSITION

OF METALLIC PARTS

Karl J Kremer, Jochen Brauner, Klaus-Dieter Glaubitz, Helmut Eckstein, Josef Bruggemann, Siegen, Federal Republic Of Germany assigned to Krup Stahl A G