preconcentration
美 
英
- n.预富集；预选；预浓缩
- 网络前浓缩；预先富集；预浓缩系统
英汉解释
例句
Hence, the preliminary separation and preconcentration of trace elements from matrix is often required.
因此，从基体中分离和预富集痕量元素显得十分必要。
A lot of facts have show that the preconcentration has been used for trace analysis with satisfactory result and low detection limit.
大量文献表明预富集技术用于痕量分析取得满意的效果，降低了检测限，提高了灵敏度。
Because of the content of microelements is extremely low, the preconcentration is usually necessary.
由于这些微量元素的含量很低，通常在测定前要进行预富集。
The composition, work principle as well as measurement and control system of a new X-ray separator for ore preconcentration are presented.
介绍了新型矿石预选设备X射-线分选机的组成、工作原理及其测量操作系统。
High sensitivity detector and sample preconcentration techniques are often adopted to improve concentration detection limits in CE.
为此，常采用高灵敏的检测器和样品预富集技术来提高毛细管电泳的检测灵敏度。
Both batch and column variants of SPE can be used for preconcentration purposes.
固相萃取的分配变量和圆柱变量都可以用于预浓缩的用途。
The single-drop microextraction is a very promising 'environment friendly'technique of separation and preconcentration.
有机化合物的有效方法，是一种有发展前途的的分离富集技术。
Preconcentration of phthalate esters in environmental aquatic samples by n - octadecyl -bonded membrane extraction .
环境水样中邻苯二甲酸酯固相膜萃取预富集方法。
The preconcentration of lean magnetite ore for discarding the tailings has good economic feasibility.
预选抛尾后的贫磁铁矿分选处理，具有良好的经济可行性。
In order to improve the detection sensitivity of capillary electrophoresis, various sample preconcentration methods have been developed.
为了提高毛细管电泳的检测灵敏度，多种样品富集的方法得以发展。
Spectrophotometric Determination of Trace Protein in Water After Preconcentration on an Organic Solvent-Soluble Membrane Filter
可溶性滤膜富集-分光光度法测定水体中微量蛋白质
Discovery and Gold Preconcentration Study of the Lamprophyre Alteration-type Gold Deposits in the Qinling Area
秦岭地区蚀变煌斑岩型金矿的发现及金的预富集研究
Standard Test Method for Analysis of Ores, Minerals, and Rocks by the Fire Assay Preconcentration Optical Emission Spectroscopy
用燃烧检测预精选技术对矿石、矿物和岩石做光谱测定分析的标准试验方法
Spectrophotometric Determination of Orthophosphate in Natural Water After Preconcentration by Activated Alumina Micro-column
氧化铝微柱预富集分光光度法测定天然水体中微量磷酸根
Ambient air - Determination of total non-methane organic compounds - Cryogenic preconcentration and direct flame ionization detection method
环境空气.全部无甲烷有机化合物的测定.低温预浓缩和直接火焰电离探测法
Determination of cadmium in environmental water samples by on-line preconcentration-derivative flame atomic absorption spectrometry
在线富集-导数火焰原子吸收光谱法测定环境水样中镉
Determination of Cerium in Fertilizer by Fluorescence Spectrophotometry with Micro-Column Preconcentration in Flow Injection System
流动注射微柱预分离富集荧光光度法测定肥料中的铈
Preconcentration with Crosslinked Chitosan for Determination of Trace Manganese in Waters by Flame Atomic Absorption Spectrometry
交联壳聚糖预富集火焰原子吸收光谱法测定水中总锰
Determination of trace tantalum in stone coal slag with flow injection-ion exchange separation and preconcentration-spectrophotometry;
研究了流动注射在线离子交换预富集及在线氢化物发生法与原子荧光光谱法的联用技术。
Novel sample preconcentration techniques for capillary electrophoresis
毛细管电泳分析中的样品预富集新技术
Sample Preconcentration Technique in Capillary Electrophoresis
毛细管电泳中的样品浓缩技术
Flow Injection on-line Preconcentration with Anion-exchange-resin and Flame Atomic Absorption Spectrometric Determination of Trace Cadmium
阴离子树脂微柱在线预富集火焰原子吸收法测定痕量镉
Determination of Platinum Group Elements of Geological Samples by Preconcentration of Nickel Sulfur Assay-Neutron Activation Analysis
镍锍试金富集-中子活化分析测定地质样品中的铂族元素
On-column Preconcentration and Determination of Inorganic Anions in Cigarette Samples with Capillary Electrophoresis
在柱双重富集毛细管电泳法测定卷烟样品中的无机阴离子
Investigation on Preconcentration and Electrochemical Behaviour of Piperine at TBP Modified Glassy Carbon Electrode
胡椒碱在磷酸三丁酯修饰电极上的电化学行为研究
Application of chemically modified electrodes to selective preconcentration and separation
化学修饰电极在选择性富集分离中的应用
Applications of Flow Injection Knotted Reactor On-line Separation and Preconcentration Coupled with Atomic Spectrometry
流动注射编结反应器在线分离富集技术在原子光谱中的应用
Synthesis and application of an aminophosphonic-carboxylic acid chelating resin for preconcentration of rare-earth elements
氨基膦酸羧酸螯合树脂的合成及其对痕量镧系稀土富集分离性能的研究
Determination of trace cadmium in water samples by flame atomic absorption spectrometry with flow injection on-line preconcentration
流动注射在线富集-火焰原子吸收光谱法测定水中痕量镉
Determination of trace magnesium by thin layer resin phase spectrophotometry with loading resin preconcentration
负载树脂预富集薄层树脂相分光光度法测定痕量镁
Ultra-trace analysis of iridium in coastal seawater sample by neutron activation analysis after anion exchange preconcentration
阴离子交换预浓集-中子活化法测定近岸海水样品中的超痕量铱
Chemical Spectrometric Determination of Trace Gold in Plant with Polyurethane Preconcentration
泡沫塑料富集植物样品中痕量金的化学光谱测定
Applications of On-line Separation and Preconcentration Techniques in Atomic Absorption Spectrometry
流动注射在线分离浓集技术在原子吸收光谱分析中的应用
Determination of Trace Iron in Cobalt Sulfate by AAS after Separation and Preconcentration by Coprecipitation with Cerium Phosphate
磷酸铈共沉淀原子吸收光谱法测定硫酸钴中的痕量铁
Determination of Iridium in the Bering Sea and Arctic Ocean Seawaters by Anion Exchange Preconcentration-neutron Activation Analysis
白令海和北冰洋海水中铱的阴离子交换预富集-中子活化分析
Flame Atomic Absorption Spectrometric Determination of Trace Copper in Water After Its Preconcentration on Chitosan
壳聚糖富集火焰原子吸收法测定水中痕量铜
Ion Exchange Preconcentration Technique in Capillary Zone Electrophoresis
毛细管区带电泳的离子交换在柱预富集技术研究
Study on spectrophotometric determination of micro iron after preconcentration by micro fitter membranes
微孔滤膜富集测定食品中微量铁的研究
Preconcentration and separation of tobacco alkaloids by capillary zone electrophoresis
毛细管区带电泳富集分离烟草生物碱
Preconcentration and Separation of Mercury in Environmental Waters with Polyamide and Loading-Polyamide Resin
聚酰胺和负载聚酰胺树脂富集分离环境水中无机汞
