Abstract
Rapid determination of silicon in Be-Cu alloys is studied by a colorimetric molybdenum blue method. The sample is dissolved by H₂SO₄ (1:6) and H₂O₂, and heated to decompose the H₂O₂. After dilution, a 10% ammonium molybdate solution is added. After 5 min, 4% HF and 30% ferrous ammonium sulfate solutions are added. The absorption of molybdenum blue is measured at 750 m mu . The time requ-ired for an analysis is about 20 min. (auth)
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