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首页> 外文期刊>Separation and Purification Technology >Rapid extraction of lead(II) from sucinate media with n-octylaniline in toluene
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Rapid extraction of lead(II) from sucinate media with n-octylaniline in toluene

机译：用正辛基苯胺在甲苯中从蔗糖介质中快速萃取铅（II）

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摘要

The distribution equilibrium of lead(II) species between aqueous succinate media and n-octylaniline was studied as a funciton of the concentrations of extractant in organic phase, weak organic acid concentration, different diluents and effect of shaking period on extraction. The quantitative extraction of lead(II) was observed with n-octylaniline in toluene from 0.0035 to 0.0065 M sodium succinate media in the pH range 8.0-8.3. The metal ion was strippe out from organic phase with water and determined complexometrically with disodium salt of EDTA or spectrophotometrically with PAR. The extraction of lead(II) was quantitative in most aromatic solvents, such as benzene, toluene and xylene, and oxygen containing solvents, amyl alcohol and n-butanol, and also in carbon tetrachloride. the stoichiometry of the extracted species was detrmined on the basis of sloe analysis and found to be 1:2:2 (metal: acid: extractant). As an application the system was used for selective extraction of lead(II) from its binary mixture with Zn(II), Tl(I), Tl(III), Bi(III), Al(III), Cu(II), Th(IV), U(VI), Sn(IV), Sb(III) and Ca(II). The distribution coefficient for lead(II) in succinate media was of higher magnitude than salicylate and malonate media. This developed method was successfully applied for the analysis of lead(II) in real samples such as alloys, ores and pharmaceutical materials.
机译：研究了琥珀酸介质与正辛基苯胺之间铅（II）物种的分布平衡，它是有机相中萃取剂浓度，弱有机酸浓度，不同稀释剂以及振荡时间对萃取的影响的函数。在pH范围为8.0-8.3的条件下，用正辛基苯胺在甲苯中从0.0035至0.0065 M的琥珀酸钠介质中定量提取了铅（II）。用水从有机相中汽提出金属离子，并用EDTA二钠盐络合测定或用PAR分光光度法测定。在大多数芳族溶剂（例如苯，甲苯和二甲苯）以及含氧溶剂，戊醇和正丁醇以及四氯化碳中，铅（II）的萃取是定量的。在污泥分析的基础上确定了提取物的化学计量，发现其为1：2：2（金属：酸：提取剂）。作为一种应用，该系统用于从其与Zn（II），Tl（I），Tl（III），Bi（III），Al（III），Cu（II）， Th（IV），U（VI），Sn（IV），Sb（III）和Ca（II）。琥珀酸介质中铅（II）的分布系数比水杨酸盐和丙二酸介质的分布系数高。这种开发的方法已成功地用于分析合金，矿石和制药材料等实际样品中的铅（II）。

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