制备了硫代乙酰胺键合硅胶（TAA-SG）,并以它作为固相萃取吸附剂,通过火焰原子吸收光谱法（FAAS）研究了对Cu2＋、Pb2＋的萃取性能。系统考察了pH、振荡时间和吸附容量等静态吸附性能实验以及流速、洗脱液条件、最大试样体积和干扰离子等动态吸附性能实验对Cu2＋、Pb2＋定量回收的影响,确定了最佳吸附条件。实验结果表明,当介质的pH为5时,振荡25 min时吸附达到平衡,对Cu2＋、Pb2＋的最大吸附容量分别为15.05 mg/g和21.10 mg/g。TAA-SG用于饮用水中痕量Cu2＋、Pb2＋的吸附富集测定,加标回收率在98.4%~102.0%之间。
Monodisperse or narrow disperse micrometer core-shell microspheres having active carboxyl groups with a dense core and a lightly crosslinked functional shell were prepared by two-stage precipitation polymerization in toluene/acetonitrile （volume ratio 1：3） mixed solvent. It was showed that core-shell microspheres with relatively large specific surface area, pore volume, graft volume and particle size were obtained by using toluene/acetonitrile mixture alternative to neat acetonitrile as the reaction medium. With increasing the amount of poly （DVB-55） or shortening the reaction time or reducing the amount of monomer and crosslinker, the particle size, the graft and the level of adhesion among particles decrease, while the uniformity of microspheres increases.
参考文献
| [1] | MariaS.Di nezio;Miriam E.Palomeque;Beatriz S.Fernandez Band .A sensitive spectrophotometric method for lead determination by flow injection analysis with on-line preconcentration[J].Talanta: The International Journal of Pure and Applied Analytical Chemistry,2004(2):405-409. |
| [2] | Celal Duran;Ali Gundogdu;Volkan Numan Bulut;Mustafa Soylak;Latif Elci;Hasan Basri Senturk;Mehmet Tuefekci .Solid-phase extraction of Mn(II), Co(II), Ni(II), Cu(II), Cd(II) and Pb(II) ions from environmental samples by flameatomic absorption spectrometry (FAAS)[J].Journal of hazardous materials,2007(1/2):347-355. |
| [3] | Afsaneh Safavi;Safieh Momeni;Narges Saghir;Nasser Iranpoor .Glycerol-silica gel: A new solid sorbent for preconcentration and determination of traces of cobalt(II) ion[J].Analytica chimica acta,2006(1/2):139-144. |
| [4] | Anupama Goswami;Ajai K. Singh;B. Venkataramani .8-Hydroxyquinoline anchored to silica gel via new moderate size linker: synthesis and applications as a metal ion collector for their flame atomic absorption spectrometric determination[J].Talanta: The International Journal of Pure and Applied Analytical Chemistry,2003(6):1141-1154. |
| [5] | Cui YM;Chang XJ;Zhu XB;Luo HX;Hu Z;Zou XJ;He Q .Chemically modified silica gel with p-dimethylaminobenzaldehyde for selective solid-phase extraction and preconcentration of Cr(III), Cu(II), Ni(II), Pb(II) and Zn(II) by ICP-OES[J].Microchemical Journal: Devoted to the Application of Microtechniques in all Branches of Science,2007(1):20-26. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%