Chemistry Department Yasouj University, Yasouj 75914-35, Iran.
J Hazard Mater. 2009 Dec 30;172(2-3):802-8. doi: 10.1016/j.jhazmat.2009.07.065. Epub 2009 Jul 24.
A new method is described for the simultaneous preconcentration of trace metal ions. The method is based on the adsorption of Co(2+), Ni(2+), Cu(2+) and Cd(2+) ions on 2,4,6,8-tetra(2-hydroxyphenyl)-1,3,5,7(1,3)tetrabenzenzcyclooctaphane-14,16,34,36,54, 56,74,76-octol (salicylaldehyde calix[4] resorcinarenes) (new resorcinarenes derivative) modified on Amberlite XAD-16. The adsorbed analyte ions were eluted with 6 mL 3M HCl in acetone solution, which then were determined by atomic absorption spectroscopy. The influences of the analytical parameters including pH, ligand amount and solid phase ingredient, eluting solution conditions and sample volume were investigated. Common coexisting ions did not interfere with the separation and determination. The preconcentration factor is 208. The sorbent exhibited excellent stability and its sorption capacity under optimum conditions has been found to be more than 60 microg of ions per gram of sorbent. The relative standard deviation under optimum conditions is lower than 4.10%. The accuracy of the method was estimated by using different real samples.
描述了一种同时预富集痕量金属离子的新方法。该方法基于 Co(2+)、Ni(2+)、Cu(2+)和 Cd(2+)离子在 2,4,6,8-四(2-羟基苯基)-1,3,5,7(1,3)四苯并环辛烷-14,16,34,36,54,56,74,76-八醇（水杨醛杯[4]间苯三酚缩芳烃）（新的间苯三酚缩芳烃衍生物）上的吸附。用 6ml 3M HCl 在丙酮溶液中洗脱吸附的分析物离子，然后用原子吸收光谱法测定。考察了分析参数（pH 值、配体用量和固相成分、洗脱溶液条件和样品体积）的影响。常见共存离子不干扰分离和测定。预浓缩因子为 208。该吸附剂具有良好的稳定性，在最佳条件下的吸附容量超过每克吸附剂 60 微克的离子。在最佳条件下，相对标准偏差低于 4.10%。通过使用不同的实际样品来估计该方法的准确性。
