Marahel Farzaneh, Ghaedi Mehrorang, Shokrollahi Ardeshir, Montazerozohori Morteza, Davoodi Shahnaz
Omidiyeh Azad University, Omidiyeh, Iran.
Chemosphere. 2009 Jan;74(4):583-9. doi: 10.1016/j.chemosphere.2008.09.034. Epub 2008 Nov 21.
A simple and relatively fast approach for developing a solid phase extraction has been described and used for determination of trace quantities of some heavy and transition metal ions with sodium dodecyl sulfate (SDS)-coated poly vinyl chloride (PVC) modified with bis(2-hydroxyacetophenone)-1,4-butanediimine (BHABDI) ligand. The adsorbed ions were stripped from the solid phase by 10 mL of 3M nitric acid as eluent. The eluting solution was analyzed for metals content (cadmium, chromium, cobalt, copper, lead and zinc) by flame atomic absorption spectrometry (FAAS). The main factors such as pH, amount of ligand and PVC, amount and type of surfactant, and condition of eluting solutions on the sorption recovery of metal ions have been investigated in detail. The relative standard deviation was found in the range of 1.0-3.2% for 0.2 microg mL(-1)of metals ions. After optimization of the extraction condition and the instrumental parameters, a detection limit was found to be in the range of 1.2-3.1 microg L(-1), with enrichment factor of 50 was achieved. The method was successfully applied for the determination of these metals contents in real samples with satisfactory results.
描述了一种开发固相萃取的简单且相对快速的方法，并将其用于用双（2-羟基苯乙酮）-1,4-丁二亚胺（BHABDI）配体改性的十二烷基硫酸钠（SDS）包覆的聚氯乙烯（PVC）测定痕量的一些重金属和过渡金属离子。用10 mL 3M硝酸作为洗脱剂将吸附的离子从固相中洗脱下来。通过火焰原子吸收光谱法（FAAS）分析洗脱液中的金属含量（镉、铬、钴、铜、铅和锌）。详细研究了pH、配体和PVC的用量、表面活性剂的用量和类型以及洗脱液条件等主要因素对金属离子吸附回收率的影响。对于0.2 μg mL(-1)的金属离子，相对标准偏差在1.0-3.2%范围内。在优化萃取条件和仪器参数后，检测限在1.2-3.1 μg L(-1)范围内，富集因子达到50。该方法成功应用于实际样品中这些金属含量的测定，结果令人满意。
