To avoid confusion, it should be noted that different adsorption methods are named solid-phase extraction【6】. First ofall, these are techniques based on the use of chemically bonded complexing groupings【10】. Commercially available Kelex-100,containing iminodiacetate functions is one of best known adsorbents of this kind.【7,8】 A number of adsorption materials with various classical chelating groups as well as with macrocycles attached to silica gel by a chemical bond are applied.【9,10】 There are some new technologies that have appeared in SPE and SPE-related products. Solid-phase microextraction (SPME) involves the sorption of analytes onto a microfiber, which is made of a fused-silica fiber coated with a hydrophobic polymer. SPME is usually followed by direct desorption in the inlet of a gas chromatograph.【11,12】 This method can be considered as a microvariant of extraction chromatography【13】 There are some new phases for SPE including highly cross-linked copolymers, graphitized carbon for adsorbing polar organic compounds, internal reversed-phase sorbents for clean-up of complex biological materials, etc.【6】
为了避免混淆，必须注意被命名为固相萃取的不同吸附方法。【6】首先，它们都是基于采用了化学方法结合的配位组分的技术。【10】商业上用到的萃取剂Kelex-100，含有亚氨基双乙酸盐官能团，是这类吸附剂中最为人熟知的。许多吸附性物质得到了应用，这些物质具有各种各样的传统的鳌合物基团以及大的环烷基，它们通过化学键附在硅胶上。【9,10】在固相萃取领域中也出现了一些新技术以及与固相萃取相关的产品。固相微萃取（SPME）是一种包含了对微纤表面物质进行分离的技术，这里的微纤是一种表面复合了一层厌水聚合物的玻璃纤维。固相微萃取（SPME）通常用于在气体套色复制入口的直接解析。【11,12】这已经被作为套色版微量萃取的一种方法。还有一些固相萃取的新的物相，包括高度耦合的共聚物、用于吸附极性有机化合物的被石墨化的碳物质、用于清除复杂的生物材料的内部倒相的吸附剂等等。【6】

Alkyl-bonded sorbents have been mainly studied for SPE in inorganic analysis; our attention in this paper will be focused on such materials. The most simple mode of metal preconcentration by SPE is based on the addition of a soluble complexing reagent to the test solution, followed by the adsorption of metal complexes formed on an alkyl-bonded material. Another mode in SPE involves a preliminary dynamic modification of a similar adsorbent, e.g. by a solution of a chelating agent, which is retained at the material surface during the following separation process due to non-covalent interactions. Thus-prepared sorbents possess the properties of materials bearing covalently-bonded chelating functions. Both modes of SPE are examined in this paper.
烷基吸附剂应用于无机分析中的固相萃取已经被主要研究，本文将集中讨论这类材料。采用固相萃取法的金属预浓缩的最简单的方式就是在被测溶液中加入相溶的配位试剂，然后在通过吸附在烷基物质表面形成金属联合体。另一种固相萃取法的方式是通过某种溶液（例如一种螯合剂溶液）对类似的吸附剂进行初步的动态的处理，这种溶液由于非共价键作用在接下来的分离过程中会保留在材料的表面。经过这种处理的吸附剂拥有了这样的材料性能：共价鳌合功能。固相萃取法的两种方式在本文中都将得到验证。

参加的人怎么这么少呀，在来一段，第二部分的第二段
Two approaches can be applied to the treatment of SPE experimental data. The first one may be based on the Snyder “competition” model, which describes the distribution of a solute between liquid and solid phases.14,15 In this model it is assumed that the solid surface is covered with mobile-phase molecules, and that solute molecules have to compete with the
solvent molecules in this adsorption layer to occupy an adsorption site. It is the difference between the affinity of the mobile phase and that of solute for the stationary phase that determines the retention in LSC and, therefore, in SPE according to the competition model. Snyder14 formulated the following equation that interrelates the distribution coefficient KD = ci,s/ci,m (c denotes concentration in one phase) with the adsorption area of the solute molecule Ai and the adsorption energy of the solute on a standard adsorbent Si 0:
log KD = log Va + α(Si0 – AiE0), (1)
where Va is the volume of the adsorbed solvent per gram of the stationary phase and α is the adsorbent activity.
In the frames of the second model, which is more practical for our further speculations, the distribution of a solute in SPE can be considered as a partition between two liquid phases. By definition, the capacity factor is a dimensionless quantity, which is in this case described by
k = KDVs/Vm, (2)
where Vs and Vm are the volumes of the stationary and liquid phases, respectively. It is assumed in this model that the analyte-containing phase is a homogeneous solution. Because relative values are used in the calculations, in both cases the experimental values of the capacity factors allow us to discuss the dependence of the chromatographic efficiency on both the properties of the stationary phase and the solutes to be separated and the experimental conditions.
处理固相萃取的实验数据通常有两种方法。第一种是 以斯奈德竞争模型为基础的。该模型描述了溶质在液相和固相中的分布。它假设固相表面是完全被流动相所覆盖，溶质分子和溶剂分子必须在吸附层中进行吸附竞争。流动相和溶质相对于固定相的亲和力是不同的，固定相决定了溶质在液固色谱中的保留时间，因此在固相萃取中，根据竞争模型，斯奈德建立了与分配系数相关的流动方程：kd=cis/cim(c表示在一种相中的浓度)溶质分子的吸附面积Ai和溶质在标准吸附剂的吸附能力Si0：（1）
Va表示每克固定相吸附溶剂的体积。X表示吸附剂活性。
在第二种模型设计中，更接近于实际情况，溶质在固相萃取中的分布考虑了在两种液相中的分布。容量因子是一个无量纲的数值，定义表达式为：（2）
Vs和Vm分别是固定相和流动相的体积。在这种模型中它假设包含分析物的相是一个均相溶液， 又因为在结论中用到了相对值，在这两种情况下，我们讨论了容量因子的实验值与固定相的性质，溶质的分离度和实验条件的关系。

如果碰见不可复制的PDF格式原文，可以尝试用CAJ6.0打开，用文字识别功能，一般可以搞定。
目前我阅读PDF主要用foxit reader，编辑无版权问题的PDF用PDFeditor,PDF text viewer,如果你觉得Adobe reader太慢，可以试用以上软件，thanks！

感谢楼上提供的方法，可惜我还是用不了，我们的操作系统限制个人安装任何形式的软件，也就是我们只有使用权。我现在就所有rar的文件都看不了，只能看zip的。

是PDF文件，可以复制。Chris选择的英文原文我都贴出来了。

这次参加的是很少，是不是我们的规则有问题呢？还是英文资料不合适呢？检讨中……

我用snapshot tool选取一段文字后，贴不上来呀，还有其他的tool吗？谢谢weize的帮助。

文章内容和仪器相关应该就可以了，不一定要和每个人的工作都相关，估计版主也很难找到这样的文章。 至少我的工作是不需要固相萃取装置的，平时也不太关注这方面。可能是大家太忙，还没有看到吧。

太好了，这对我们学习专业英语有很大帮助哦！

Like most of separation methods, SPE is based on the distribution of a solute between two phases. Both batch and column variants of SPE can be used for preconcentration purposes. The column mode can be considered as a version of reversed phase liquid–solid chromatography (RP LSC).13 In fact, alkyl-bonded stationary phases with the alkyl length nc= 8,
16, or 18 and different grain sizes are most often used.Chromatographic retention is conveniently described by the capacity factor, k, which is defined as ki = qi,s /qi,m , where q i,sand qi,m denote the total quantity of a solute (i) to be present in the stationary phase (s) and the mobile phase (m), respectively.14,15 The higher is the k value, the better is the solute retained, and the later is eluted from the column. Correspondingly, the
separation selectivity can be defined as the relative retention of βi,j , which is sometimes called the separation factor,expressed in terms of the capacity factors,βi,j = kj /ik. If the preconcentration of a group of dissolved ions or molecules is
required, the k values for all of the solutes should be as close as possible.
和大多数的分离方法一样，固相萃取（SPE）是建立在两相之间溶质的分布情况基础上的。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。圆柱模式可以认为是反相液固色谱法（RP LSC）13的变形。实际上，最常用的是烷基长度nc＝8，16或者18和不同粒度大小的烷基固定相。色谱分析法的保留值习惯上用负载因子k来描述，它的定义如下：ki＝qi，s/qi，m，qi，s， qi，m分别表示要呈现的在固定相（s）和流动相（m）中的溶质（i）的总质量。14，15k值越高，溶质的保留性能越好，后者从柱模式中提取。相应地，分离的选择性βi，j可以定义为两种溶质的相对保留值，有时叫做分离因数，从负载因子的角度来表达如下：βi，j＝kj /ki。如果需要对一组溶化的离子和分子预浓缩，所有溶质的k值应该尽可能接近。