Studies on the Flame Spectrochemical Analysis. VII : Determination of Chromium
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Chromium radiated its spectral line at 359.0mμ, 425.0mμ, 427.5mμ, 428.9mμ and 520mμ, and the spectrum was intensest at 425.0mμ and next at 427.5mμ. Hydrochloric acid and nitric acid had no effect on the emission, but sulfuric acid decreased it. Phosphoric acid did not reveal such a phenomenon as on the spectrum of calcium or manganese, although it decreased the intensity. Alkali metal increased the intensity appreciably, while alkali earth metals depressed the emission remarkably when their concentration became large. From the experiment it was suggested that calcium and chromium would be combined in the flame causing emission depression of each spectrum. Other elements, such as aluminium, cobalt and copper decreased the chromium intensity, while iron and manganese had no effect. Using this result, chromium in iron-chromium alloy or slags were determined.
- 東北大学の論文
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