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采用微波炉溶样,石墨炉法原子吸收测定含镁矿物质中铅、镉含量,选择了钴盐和硝酸镁为混合基底改进剂。在1%—2%的硝酸介质中应用塞曼效应扣除背景,直接测定痕量铅、镉。
The contents of lead and cadmium in magnesium-containing minerals were determined by microwave sample-dissolving and graphite furnace atomic absorption spectrometry. Cobalt salt and magnesium nitrate were selected as the mixed base improvers. Apply Zeeman effect to 1% -2% nitric acid medium to deduct background and directly measure trace lead and cadmium.