Abstract
The emission intensity of cesium at 852.1 nm has been studied in hydrogen flames burning with various mixtures of oxygen and nitrogen. A significant maximum was observed in the relative emission intensity of cesium at an oxygen to nitrogen ratio of 3:2 in the aspirating gas. The effect of Rb +, K +, Li +, Na +, and NH 4 + ions on cesium emission is much less pronounced in this optimum flame than in a pure oxy-hydrogen flame. The optimum flame (60% oxygen) yields a significantly better calibration curve than can be obtained in either the normal air-hydrogen or oxyhydrogen flame for 0–12 p.p.m. cesium concentrations; the graph is linear over this concentration range.
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