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The dry-ashed sample was dissolved in water. The solution was sprayed into the air-acetylene flame and the absorption at 330.2/330.3nmwas measured. 試樣以乾灰法処理，所得灰份用水溶解，在空氣-乙炔火焰中，330.2/330.3納米波長処作原子吸收測量。