Gaziosmanpasa University, Faculty of Science and Arts, Department of Chemistry, 60250, Tokat, Turkey.
J Hazard Mater. 2010 Apr 15;176(1-3):1032-7. doi: 10.1016/j.jhazmat.2009.11.144. Epub 2009 Dec 3.
Ni(2+)/2-Nitroso-1-naphthol-4-sulfonic acid precipitate was used for the coprecipitation of Co, Pb, Cu, Fe and Zn prior to their flame atomic absorption spectrometric (FAAS) determinations in environmental samples. The precipitate could be easily dissolved with concentrated nitric acid. The recovery values for analyte ions were higher than 95%. The parameters including pH, sample volume, centrifuge time, amounts of nickel and matrix effects were optimized for the quantitative recoveries of the analytes. The relative standard deviations of cobalt, lead, copper, iron and zinc were found 4.5, 5.7, 3.8, 6.1 and 7.5%, respectively. The limit of detection was calculated as 1.05, 2.67, 1.30, 1.38, and 0.50 microg L(-1) for cobalt, lead, copper, iron and zinc. The validation of the procedure was checked by the analysis of IAEA 336 lichen and SLRS 4 Riverine water standard reference materials were analyzed with satisfactory results. The presented coprecipitation procedure was successfully applied to some environmental samples for determination of analyte ions.
镍（2+）/2-亚硝基-1-萘酚-4-磺酸沉淀用于共沉淀环境样品中的钴、铅、铜、铁和锌，然后用火焰原子吸收光谱法（FAAS）进行测定。沉淀可以用浓硝酸轻松溶解。分析物离子的回收率均高于 95%。优化了 pH 值、样品体积、离心时间、镍的用量和基体效应等参数，以实现分析物的定量回收。钴、铅、铜、铁和锌的相对标准偏差分别为 4.5%、5.7%、3.8%、6.1%和 7.5%。钴、铅、铜、铁和锌的检出限分别计算为 1.05、2.67、1.30、1.38 和 0.50μg/L。通过分析国际原子能机构的 336 地衣和 SLRS 4 河流标准参考物质来验证该方法的准确性，结果令人满意。该共沉淀方法已成功应用于一些环境样品中分析目标离子。
