Kendüzler Erdal, Türker A Rehber
Faculty of Education, Gazi University, 40100, Kirşehir, Turkey.
Anal Sci. 2002 Aug;18(8):917-21. doi: 10.2116/analsci.18.917.
A solid-phase extraction method for the preconcentration of Fe, Mn and Zn on a column containing Ambersorb 572 has been developed, and the determination of Fe, Mn and Zn in water using a flame atomic absorption spectrophotometer (FAAS) has been performed. The optimum preconcentration parameters of the procedure have been determined. The effect of the pH, complexing agent, amount of adsorbent, flow rate, concentration and volume of the elution solution and interfering ions on the recovery of the analytes were investigated. The recoveries of Fe, Mn and Zn were 99 +/- 3%, 98 +/- 3% and 99 +/- 3% at the 95% confidence level, respectively, under the optimum conditions. Fe, Mn and Zn were preconcentrated up to 50, 100, 200, respectively. The limits of detection of Fe, Mn and Zn are 2.5, 0.68 and 0.24 micrograms l-1, respectively. The adsorption capacity of the adsorbent was found to be 10.9, 13.1 and 21.5 mg g-1 for Fe, Mn and Zn, respectively. The method has been applied to the determination of these metal ions in tap-water and river-water samples. The precision and the accuracy of the method is very good. The relative standard deviation and the relative error are lower than 4%.
已开发出一种在装有Ambersorb 572的柱上对铁、锰和锌进行预富集的固相萃取方法，并使用火焰原子吸收分光光度计（FAAS）对水中的铁、锰和锌进行了测定。确定了该方法的最佳预富集参数。研究了pH值、络合剂、吸附剂用量、流速、洗脱液浓度和体积以及干扰离子对分析物回收率的影响。在最佳条件下，铁、锰和锌在95%置信水平下的回收率分别为99±3%、98±3%和99±3%。铁、锰和锌分别被预富集至50倍、100倍、200倍。铁、锰和锌的检测限分别为2.5、0.68和0.24微克/升。发现吸附剂对铁、锰和锌的吸附容量分别为10.9、13.1和21.5毫克/克。该方法已应用于自来水和河水样品中这些金属离子的测定。该方法的精密度和准确度非常好。相对标准偏差和相对误差低于4%。
