上层清液

取上层清液用于LC／MS／MS分析。

The supernatant was evaporated to for LC / MS / MS analysis .

采用转化法将甲醇相中棉酚转移到丙酮溶剂中，经离心沉淀后取上层清液在370nm波长下测定棉酚含量。

The gossypol solved in methanol phase was resolved by transformation to acetone solvent and its supernatant liquid after centrifugation was analyzed at 370 nm .

通过Zeta电位的测定、颗粒粒度分析、FT-IR和UV-vis光谱等研究方法对胆石病人胆汁及离心后的上层清液进行了研究。

The patient bile and its centrifugate were studied by particle size analysis and zeta potential determination , FTIR spectra , UV-vis spectra .

其中，三聚氰胺在上层清液和下层沈淀中都有较高的含量。

Both of the upper clear liquid and lower sediment have a higher content of melamines .

涂料用乙醇和石油醚（3+1）混合溶剂超声提取，经高速冷冻离心，上层清液用无水硫酸钠脱水，经过0.45μm滤膜过滤后进行气相色谱分析。

The extract was separated by freezing centrifugation at high speed . The separated upper clear layer ( the extract ) was then dehydrated by anhydrous sodium sulfate , and filtered through a 0 . 45 μ m filtering membrane . The filtrate was ready for GC analysis .

随着静置时间的延长，12种橡实淀粉糊的透光率逐渐减小，上层析出清液的体积数逐渐增多；

If each paste of acorn starch was placed too long , its clarity would slowly decrease and the volume of separated water also gradually add .