Preconcentration and separation of trace elements in environmental samples with various sorbents

1)综述了活性炭、多孔聚合物、化学改性吸附剂和天然聚合物等多种吸附剂对痕量金属的预富集方法。2)合成了二氨基甲酸乙酯-几丁质，研究了其对金、钯和钌离子的吸附行为。dtc -甲壳素在6 M hcl - ph9水溶液中定量保留金和钯。钌保留时只有40%在pH值范围3.0 - -4.53)的一种新方法的预浓缩和决心在水中微量锂ppb-ppm顺序与12-crown-4 thenoyltrifluoroacetone复杂(12 c4)已经建立了通过协同萃取和反萃取结合火焰photometry4)的预浓缩的新方法和决心在水中微量锂ppb-ppm水平作为其thenoyltrifluoroacetone复杂采用萃取法和反萃取法结合火焰光度法确定了磷酸三丁酯。5)研究了金属-8-喹啉酚磺酸盐和-双硫醇II在聚三氟氯乙烯树脂上的吸附行为，实现了8-喹啉酚和双硫醇II配合物对微量金属的预富集。6)建立了铁（II）和钴（II）分别作为亚铁锌和亚硝基r配合物与聚三氟氯乙烯树脂的预富集方法。该方法已应用于天然水体中两种元素的分析。

1) The preconcentration methods of trace metals with various sorbents, such as activated carbon, porous polymer, chemically modified sorbents and natural polymers, were reviewed.2) A ditiocarbanate-chitin was synthesized and investigated for its adsorption behavior for gold, palladium and ruthenium ions. Gold and palladium were quantitatively retained of DTC-chitin from aqueous solution of 6 M HCl-pH 9, while ruthenium was retained only 40% at pH range 3.0-4.53) A new method for the preconcentration and determination of a trace amount of lithium in ppb-ppm order in water as its thenoyltrifluoroacetone complex with 12-crown-4 (12C4) has been established by means of synergic extraction and back extraction combined with flame photometry4) A new method of preconcentration and determination of a trace amount of lithium in ppb-ppm levels in water as its thenoyltrifluoroacetone complex with tributylphosphate has been established by means of extraction and back extraction combined with flame photometry.5) Adsorption behavior of metal-8-quinolinol sulfonate and - Bismuthiol II on poly(chlorotrifluoroethylene) resin was investigated and the preconcentration of trace metals as their 8-quinolinol and bimuthiol II complexes with the resin has been achieved.6) Preconcentration method of iron(II) and cobalt(II) as their ferrozine and nitroso-R complexes, respectively, with poly- (chlorotrifluoroethylene) resin has been established. The method was applied to analysis of natural waters for both elements.