Buke Berrin, Divrikli Umit, Soylak Mustafa, Elci Latif
Chemistry Department, Science and Arts Faculty, Pamukkale University, 20020 Denizli, Turkey.
J Hazard Mater. 2009 Apr 30;163(2-3):1298-302. doi: 10.1016/j.jhazmat.2008.07.096. Epub 2008 Jul 30.
An on-line solid phase extraction method for the preconcentration and determination of Cu(II) by flame atomic absorption spectrometry (FAAS) has been described. It is based on the adsorption of copper(II) ion onto a home made mini column of Chromosorb 105 resin loaded with pyrocatechol violet at the pH range of 5.0-8.0, then eluted with 1 mol L(-1) HNO(3). Several parameters, such as pH of the sample solution, amount of Chromosorb 105 resin, volume of sample and eluent, type of eluent, flow rates of sample and eluent, governing the efficiency and throughput of the method were evaluated. The concentration of the copper ion detected after preconcentration was in agreement with the added amount. At optimized conditions, for 15 min of preconcentration time (30 mL of sample volume), the system achieved a detection limit of 0.02 microg L(-1), with relative standard deviation 1.1% at 0.03 microg mL(-1) copper. The present method was found to be applicable to the preconcentration of Cu(II) in natural water samples.
描述了一种在线固相萃取方法，用于通过火焰原子吸收光谱法（FAAS）预富集和测定铜（II）。该方法基于在pH值为5.0 - 8.0的条件下，将铜（II）离子吸附到装有邻苯二酚紫的自制Chromosorb 105树脂微型柱上，然后用1 mol L⁻¹ HNO₃洗脱。评估了几个参数，如样品溶液的pH值、Chromosorb 105树脂的量、样品和洗脱剂的体积、洗脱剂的类型、样品和洗脱剂的流速，这些参数决定了该方法的效率和通量。预富集后检测到的铜离子浓度与添加量一致。在优化条件下，预富集时间为15分钟（样品体积为30 mL）时，该系统的检测限为0.02 μg L⁻¹，在铜浓度为0.03 μg mL⁻¹时相对标准偏差为1.1%。发现该方法适用于天然水样中铜（II）的预富集。
