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Versatile Gas-Metering System for Controlled Atmospheres

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Abstract:

The use of controlled atmospheres in emission-spectrographic analysis has proved to be of great value in reducing background and in improving sensitivity for some elements. In most cases, the recommended atmosphere is a mixture of two gases such as argon and oxygen. One way of obtaining such mixtures is to purchase a cylinder of gas containing a definite ratio of the two gases desired. This method, however, allows no flexibility in varying the ratio of the gases. Investigations at this laboratory have shown that there is no one gas mixture that will work for all analyses. Best results can only be achieved by varying the gas mixture to obtain optimum results for the particular problem.

Document Type: Short Communication

DOI: http://dx.doi.org/10.1366/000370267774385254

Affiliations: Bell Telephone Laboratories, Incorporated, Murray Hill, New Jersey 07971

Publication date: March 1, 1967

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