An R chart, analysis of means charts, and the range square ratio test, are applied to spectrographic data to compare two internal standards and two different buffer salts in the analysis of solutions of organic ash. The range square ratio test confirms the indications derived from the
graphical methods that cobalt is a better standard for manganese, molybdenum is better for lead, and that sodium silicate is superior to lithium chloride as a buffer salt.
Statistics Center, Rutgers University, New Brunswick, New Jersey; present address: 77 Nichol Ave., New Brunswick, N. J.
Publication date: November 1, 1961
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The Society publishes the internationally recognized, peer reviewed journal, Applied Spectroscopy, which is available both in print and online. Subscriptions are included with membership or can be purchased by institutional or corporate organizations. Abstracts may be viewed free of charge. Previously published as Bulletin (Society for Applied Spectroscopy)