The sequential chemical extraction (SCE) method is used to study the chemical states of heavy metals in industry waste slag in this paper.
介绍了一种分析测定工业废渣中重金属的化学形态的方法：连续化学萃取法。
Sequential extraction experiments were used to study the chemical mobility of fluorine in rocks.
使用逐级化学提取方法对岩石中氟元素的化学活动性进行了研究。
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