Abstract
A simple method for measuring beryllium in environmental materials was investigated by the use of flameless atomic absorption spectrophotometer equipped with a graphite tube atomizer. Nitric acid was suitable for decomposing environmental materials such as precipitator dusts which were exhausted from refuse incinerators. Furthermore, 2 to 10 N nitric acid concentration stabilized absorbance of beryllium, and eliminated background absorptions of sodium, potassium, and calcium when the charring temperature was set at 900°. Background absorption caused by less than 1000 μg/ml of aluminium, sodium silicate, manganese, magnesium, and iron could be corrected completely by using a deuterium are lamp as a background corrector. As the atomic absorption signal of beryllium was interfered by aluminium, calcium, iron, sodium silicate, and zine, which are commonly present in the dust, a method for standard addition should be used to correct these interventions. By this method, beryllium in precipitating dust can be analyzed without any separation procedure. Beryllium content in the dust of electric precipitators and multicyclones averaged 0.17 and 0.43 μg/g, respectively. Beryllium in them scarcely dissolved in water.
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