The extraction and purification methods and the chromatographic conditions were studied.
研究了五种磺胺类药物残留的提取、净化和色谱条件。
ConclusionThis text provides the extraction and purification methods to get the outcome and the purity of the flavanone is high.
结论该方法采用全物理过程，无污染，是提取龙眼壳中黄酮类物质的有效途径。
The second chapter introduces the plastic packaging Ham phthalate plasticizers in the pre-treatment methods, including extraction and purification methods.
第二章详细介绍塑料包装西式火腿中邻苯二甲酸酯类增塑剂的前处理方法，包括提取及净化方法。
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