A continuous extraction method was adopted to analyze the chemical forms of arsenic (as) in soil, and the content change of as with different forms were compared when the additives were added.
采用连续提取法对土壤中砷的化学形态进行分析研究，比较加入不同改良剂时砷的各种形态含量的变化。
Objective to compare impregnation, extraction back to normal, continuous circumfluence, ultrasonic extraction, complex method of extraction of berberine hydrochloride in the Chinese extraction rate.
目的比较浸渍法、一般回流提取法、连续回流法、超声提取法、复合方法提取黄连中盐酸小檗碱的提取率。
Methods The extraction of anthraquinone from rhubarb was performed by liquid-liquid continuous biphasic extraction and this method was compared with 3 general solvent methods.
方法采用自制装置双相水解连续萃取法提取蒽醌衍生物，并和常用的3种溶剂法对比。
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