片语

primary election（美）初选；预选

ionexchange Preconcentration离子交换浓集

precipitation preconcentration沉淀富集

separation preconcentration分离富集

Preconcentration Microchip微富集芯片

column preconcentration柱上浓缩

Microcolumn preconcentration微柱预富集

adsorptive preconcentration吸附富集

multiplexedsorption preconcentration多步吸附富集体系

preselection[计] 预选

preconcentration device预选设备

英汉例句

• on the basis of discussion about geologic settings of the hanzhong region, the understanding of characteristics of gold preconcentration is presented in this paper.

  本文在讨论汉中地区地质背景的基础上，对金矿预富集的特征提出了认识。

• since the concentrations of heavy metals in water environment are usually found at trace or ultratrace levels, a preconcentration step is often needed before detection.

  由于此类水体中重金属含量多为痕量或超痕量级，往往无法直接进行分析检测，常需在检测前进行分离富集。

• 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。

• trace amounts of molybdenum in water and soil extract samples were determined using a dual column on-line ion-exchange preconcentration fia-icp system.

  本文采用双柱在线离子交换预浓缩fia-icp系统，建立了水及土壤浸出液中痕量钼的测定方法。

• an automated sequential injection system incorporating a sample pretreatment module was developed for the separation and preconcentration of ultra-trace copper in seawater without dilution.

  将样品预处理模块与自动化顺序注射系统相结合，建立了未经稀释的海水中痕量铜的分离富集方法。

• in the past twenty years, the use of solid phase extraction techniques has become increasingly popular for separation and preconcentration of trace elemens in environmental samples.

  在过去的二十年中，利用固相萃取技术从环境样品中萃取分离富集痕量重金属离子越来越受到人们的重视，应用日益广泛。

• in analytical sciences, separation and preconcentration is usually indispensable to improve the sensitivity and selectivity of the analytical method.

  在分析科学中，为了提高分析方法的灵敏度和选择性，分离与富集往往是不可缺少的。

• currently, particular interests are focused on achieving high speed, non-biased sampling and on-line sample preconcentration to meet the requirements for analysis of real world samples.

  本文首次提出了芯片毛细管电泳负压进样法，并讨论了其在芯片毛细管电泳在线样品电聚焦富集和高通量分析中的应用。

• the conditions for synthesis of pp(polypropylene)-diphenylcarbazide resin and separation and preconcentration of silver in geological samples have been studied.

  研究了pp （聚丙烯） 二苯氨基脲树脂的合成及其分离富集样品中银的条件。

• a flow injection on-line adsorptive preconcentration system with a knotted reactor (kr) for flame atomic absorption spectrometric (faas) determination of trace lead was developed.

  本文研究了流动注射在线编结反应器吸附预富集火焰原子吸收测定痕量铅的体系。

• a preconcentration capillary and a separation capillary were connected by a polytetrafluorethylene tube with a small side opening.

  预富集毛细管和分离毛细管的端面靠紧，二者通过一段带侧孔的聚四氟乙烯套管固定。

• 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。

• a method for the determination of trace thallium in soil samples by graphite furnace atomic absorption spectrometry after preconcentration with polyurethane foam has been developed.

  本文论述了一种聚氨酯泡塑预富集—石墨炉原子吸收分光光度法测定土壤样品中痕量铊的方法。

• effect of the preconcentration technology on the development economic benefits of the deposit is discussed in this paper based on the technological and economic analysis.

  在技术经济初步分析的基础上探讨了预选工艺对某银铅锌矿开发效益的影响。

• trace lead in baked food is determined by air-acetylene flame atomic absorption spectrometry (faas) with apdc-ddtc-mibk as the extraction and preconcentration system after cineration process.

  烘焙食品试样经灰化处理后，用apdcddtcmibk体系萃取富集试液中的铅，利用空气乙炔火焰原子吸收法测定烘焙食品样品中铅的含量。

• this paper describes the effects of preconcentration technology in iron ore beneficiation, application conditions; also introduces the applications of new preconcentration technology and equipments.

  简述了预选技术在铁矿石生产应用的作用，应用的条件，介绍了选矿预选新工艺、新设备在矿山的应用。

• a flow injection on line extraction chromatographic separation and preconcentration system is proposed for the determination of trace palladium by flame atomic absorption spectrometry (faas).

  以三异辛胺萃淋树脂为微型柱固定相，采用流动注射在线预浓集与火焰原子吸收法联用技术，对微量钯的测定进行了研究。

• flow injection on-line preconcentration and separation combination with flame atomic absorption spectrometry(faas) enhance sensitivity and selectivity of faas on metal elements.

  流动注射在线分离富集技术与原子吸收光谱的结合提高了原子吸收的灵敏度和选择性。

• the preconcentration and determination of platinum, palladium, rhodium and iridium in geological samples by nickel sulphide fire assay and icp-ms were described.

  建立了锍试金富集电感耦合等离子体质谱法（icp-ms）测定地质样品中铂、钯、铑、铱的新方法。

• a new method for the determination of micro amount of gold in lead oxide by flow injection on line separation and preconcentration graphite furnace atomic absorption spectrometry is desciribed.

  采用流动注射在线分离富集-石墨炉原子吸收光谱法测定了氧化铅中痕量金。 使用本文研究的取样杯，实现了流动注射装置与石墨炉原子吸收联机测定。

• the flow injection separation and preconcentration techniques combined with atomic absorption spectrometry (aas) as well as their applications are reviewed with 86 references.

  对流动注射在线分离浓集与原子吸收光谱连用技术及其应用作了综述。引用文献86篇。

• the application of membrane separation impurity removal process, such as the purification of distillate, preconcentration in solvent evaporation, was discussed.

  同时，探讨了几种膜分离除杂工艺如蒸发馏出液的凈化、溶剂蒸发预浓缩等在腈纶生产上的应用情况。

• the lean magnetite ore can be turned into one that has utilization value by wet preconcentration by magnetic separation after fine crushing to discard most of qualified waste.

  通过采取细碎后湿式磁选预选方法，抛除掉大部分合格废石后，可以将该贫磁铁矿变成为具有开发利用价值的矿物。

• the nickel sulfide fire assay preconcentration followed by neutron activation analysis was used to determine the platinum group elements(pge) in rocks.

  研究了镍锍试金预富集中子活化分析测定巖石样品中的铂族元素。

• a method for calculation the economic results of the preconcentration using magnetic-pulley separator is recommended and a simple and rational calculation equation is deduced from the method.

  本文提出了一种计算磁滑轮预选经济效益的方法，并导出了简单而又合理的计算公式。

• the conditions for seperation and preconcentration of au in soil sample with gold orange-g chelate resin have been investigated.

  研究采用极谱法测定通过金橙g树脂分离富集的土壤样品中的金含量的方法。