查询词典 extraction

In order to separate trace plutonium from uranium matrix for subsequent mass spectroscope determination of the former,an extraction chromatographic method composed of a TBP extraction resin column and a cationic exchange resin column was developed.

为了从铀基体中分离痕量钚，采用由TBP色层柱和7402季铵盐色层柱组成的萃取色层法及低本底α谱仪对模拟铀样品中铀钚分离方法进行了研究，并确定了分离流程的条件；对影响流程分离效果的主要因素，如料液和洗涤液酸度、流速、解吸液浓度等进行了研究，确定了最佳分离流程。

MethodsUsing single factor experiment and orthogonal design,the effect of temperature, extraction time, concentration of NAOH and ratio of solid to liquor on the extraction of Ligusticum chuanxiong Hort polysaccharide were studied.

方法采用单因素实验和正交设计研究温度、时间、氢氧化钠溶液浓度、料液比对川芎多糖提取的影响。

The best extraction technology was as follows: refluxing extraction with 16 times of 80 % alcohol for 2 times (1 hour each time).

最佳工艺条件为：16倍于原料的80 %乙醇，回流提取2次，每次1 h。

Results:The optimum extraction process was adding 10 times amount of 80% alcohol,refluxing and extraction for 3 times,1h each time.

结果 ：因素A、D对阿魏酸的含量有显著影响。因素A、C、D对藁本内酯的含量有极显著影响。

Compared with alcohol refluxing extraction, microwave assisted extraction is more efficient.

此外，将微波萃取与乙醇回流提取进行了比较。

Results the optimal extraction condition of yanqing granule was: 200 ml water for 1/3 amount of drugs, refluxing extraction for 3 times and 0.5 h each time.

结果咽清颗粒的最佳提取工艺为1/3处方量的药材以200 ml水回流提取3次，每次0.5 h。

ABSTRACT Objective To study the optimal extraction conditions of griseofulvin by ultrasonic extraction methods.

目的 探讨超声波提取灰黄霉素的优化工艺条件。

This complete laboratory reference manual explains the principles behind solid phase extraction and provides readily reproducible protocols for solving extraction problems in forensic and clinical chemistry.

这本完整的实验室参考手册在固体的阶段抽出后面解释原则并且为解决抽出问题提供容易可再生的协议，法庭和临床的化学。

Effects of particle size, extraction time and extraction temperature on the yield of essential oil were investigated.

考察了原料颗粒度、提取时间、提取温度等因素对花椒精油提取得率的影响。

Methods Streptomycin and dihydrostreptomycin were extracted from honey samples using a liquid extraction with a phosphate buffer followed by a solid-phase extraction based on weak cation-exchange columns. After sample preparation, the hydrophilic interaction chromatography was used to retain streptomycin and dihydrostreptomycin on the column for the separation of the analytes from endogenous compounds. The aminoglycosides were detected and quantified with electrospray ionization tandem mass spectrometry.

方法用磷酸盐缓冲溶液提取蜂蜜中的链霉素和双氢链霉素后，经弱阳离子交换柱进行固相萃取，样品制备后采用亲水作用色谱，使链霉素和双氢链霉素实现保留，从而与内源性物质达到分离，采用电喷雾离子化串联质谱法检测和定量。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。