retrieval cue是什么意思

用法例句

High purity of citral was obtained by Soxhlet's extraction,and both the yield and purity were increased compared with traditional chemical methods.

采用不同于传统纯化柠檬醛的方法,避开了化学纯化方法中使用强碱和物理方法中采用减压精馏的方式,利用索氏提取原理,在比较低的温度下(60℃),获得了高纯度的柠檬醛(98%以上)。

In this article,PAHs on the atmospheric particles in a manufacturing district in Xi'an are determined by Soxhlet's extraction and GC/MS.

采用索氏提取器提取大气颗粒样品中的多环芳烃,并用色谱/质谱联用技术(GC/MS)测定了西安市某工业区大气中多环芳烃(PAHs)的含量,并以西安市某生活区作为对照区分析了该工业区PAHs的主要来源,测得工业区采样点大气颗粒物中8种PAHs浓度范围为86。

By comparing Soxhlet extraction with ultrasonic method,conclusion has been obtained that Soxhlet method is suitable for extracting multiple persistent organic pollutants from oil using acetone and petroleum ether as tactant and eluant in a proportion of one to one and with a recovery rate between 70%~90%,whereas ultrasonic method can be used for individual POPs,which needs less tim.

将国内最常用的两种提取方法--索式提取和超声波提取进行比较,结果表明了索式提取的方法更适合从土壤中提取多种持久性有机污染物,提取剂和洗脱剂可选比例1:1的丙酮和石油醚,回收率可在70%~90%之间;而超声波提取的方法比较适合从土壤中提取个别的持久性有机污染物,如op′-DDT和pp′-DDT,节省实验时间,试剂使用量少,回收率也可在50%以上。

The technology studied the de-fat and decolorization and deodorization from silkworm chrysalis with organic solvent(petrol, benzene, ether, 100%ethanol, acetone) by soxhlet extraction and soak extraction.

采用了索式提取法与浸泡提取法,以有机溶剂(汽油、苯、乙醚、无水乙醇、丙酮)对蚕蛹进行脱脂、脱色、除臭研究。

Determination of Total Se and Se(Ⅳ) in Chinese Herbs by Soxhlet Extraction-Hydride Generation-Atomic Fluorescence Spectrometry;

索氏提取-氢化物发生-原子荧光法测定中草药中总硒和硒(Ⅳ)

Study of Soxhlet extraction of polycyclic aromatic hydrocarbons on airborne particulate;

大气颗粒物中多环芳烃的索氏提取研究

Study on Extracting Trehalose from Beer Waste Yeast with Soxhlet Extraction Method;

用索氏提取法从废酵母中提取海藻糖的工艺

With the yield of concentration of sulfur compound as the evaluation index,the contrast between onion essential oil and onion oleoresin from dried onion powder by steam distillation,solvent extraction and Soxhlet method was studied.

以洋葱粉为研究对象,以含硫化合物浓度为评价指标,采用水蒸汽蒸馏、溶剂萃取法和索氏提取法进行洋葱精油与油树脂的比较研究。

Compared with Soxhlet method and supercritical carbon dioxide extraction, microwave extraction of orrisroot is a rapid method (about 120 s) with less solvent consumption (about 160 mL/40g orrisroot),higher yield (about 10%) and better product with good color and aroma.

微波萃取、索氏提取和超临界二氧化碳萃取鸢尾的比较结果表明 ,微波萃取法具有萃取时间短 (约 12 0s) ,提取率高 (约 10 % ) ,溶剂用量少 (约 16 0mL 40g原料 ) ,产品香气纯正等优点。

Methods The chemical components of Propolis(Gansu) extracts separated by Soxhlet extraction method were analyzed comparatively by GC-MS.

方法采用气相色谱-质谱联用(GC-MS)法对甘肃产蜂胶索氏提取法所得乙醚提取物进行分析。

Methods: The volatile components extracted from Chinese Propolis by Soxhlet extraction method, Ultrasonic extraction method, Infusion extraction method and Steam-distilled extraction were comparatively analyzed by GC-MS.

方法:采用GC-MS分别对乙醚索氏提取法、乙醚超声提取法、乙醚冷浸法和水蒸气蒸馏法提取蜂胶所得提取物的化学成分进行分析比较。

Conclusion Soxhlet extraction method is initially assessed to be a suitable extraction method for essential oils from propolis.

方法采用气相色谱-质谱(GC-MS)法对乙醚索氏提取法和水蒸气蒸馏法所得蜂胶挥发油的化学成分进行分析、比较。

Comparison of Ultrasonic and Soxhlet Extractions of Naringin in Citrus Grandis

超声波提取法与索氏提取法提取化橘红中柚皮苷的比较

Orthogonal experiment of extraction of scutellarin acid with microwave or Soxhlet's extractor

微波与索氏提取野黄芩苷的正交实验比较

The Laboratorial Research of Extraction Caffeine From Tea-leaves--With a study of The Replacement of the Sorbitic Extractors by Constant-voltage Funnels;

“茶叶中咖啡因的提取”实验研究——兼谈恒压滴液漏斗对索氏提取器的取代作用

Determination of Polychlorinated biphenyls in Material of Electronic products by Soxlet's Extraction-GC-MS method

自动索氏提取-气相色谱-质谱法测定电子电气产品材料中多氯联苯

In consideration of the cost, the method of Soxlet extracting ethanol-extraction followed by resin absorption refine is recommended.

从节约成本的角度出发建议用索氏提取进行粗提后，再用树脂吸附法进行纯化。

Determination of sixteen Polycyclic Aromatic Hydrocarbons in fried wheat products by automated Soxhlet extraction-HPLC analysis

自动索氏提取-高效液相色谱法同时测定油炸面制品中的16种多环芳烃

Extraction of nicotine in charcoal filters by Soxhlet method

索氏抽提法萃取活性炭滤嘴中吸附的烟碱

Various methods such as Soxlet extracting ethanol-extraction, circumfluence ethanol-extraction, extraction refine and resin absorption have been used to extract and isolate Astragalosides.

利用索氏醇提、回流醇提、萃取纯化、树脂吸附纯化法对黄芪皂甙进行了提取分离。

Comparison of chemical constituents for volatile oil from fresh Kaempferia galanga L.by Soxhelt method and steam distillation

索氏法和水蒸汽蒸馏法提取山柰(鲜品)挥发油化学成分的比较研究

An Efficient Method for Unloading of Rock Inclusion Section--Soxhlet Extraction Method

包裹体岩片卸洗新方法——索氏抽提法

Study on the soxhlet extraction process of polysaccharides in polyporus umbellatus

索式提取法提取猪苓总多糖工艺研究

The Study on Rapid DNA Extraction Method of Shigella from Meat Products

肉制品中志贺氏菌DNA的快速提取方法

primary sorbite

初生索氏体, 一次索氏体

Study on Extracting Ig from Colostrums Immuned by Sh.flexneri and Its Immune Activity;

抗福氏志贺氏菌免疫牛初乳Ig的提取及其免疫活性研究

A Comparative Study on Extraction of Organic Matters in Source Rocks by Accelerated Solvent Extraction and Soxhlet Extraction

生油岩中有机质加速溶剂萃取和索氏萃取方法对比

preparing a tea extract; adjusting the temperature of the extract to a value of from 20 to 80oC;

制备茶的提取物； 调节提取物的温度在20-80摄氏度之间；

Comparison of Microwave-assisted and Conventional Extraction of Corydalis yanhusuo

微波辅助提取与常规提取延胡索的比较研究

Components analysis and bioactivity determination of chicken bursa extracts

鸡法氏囊提取物的组分分析及其活性测定