KamaŞ Dilek, Karatepe Aslıhan, Soylak Mustafa
Department of Chemistry, Faculty of Arts and Science, Nevşehir Hacı Bektaş Veli University, Nevşehir Turkey.
Department of Chemistry, Faculty of Sciences, Erciyes University, Kayseri Turkey.
Turk J Chem. 2021 Feb 17;45(1):210-218. doi: 10.3906/kim-2009-26. eCollection 2021.
This study is the development of a new solid phase extraction method based on using magnetic multiwalled carbon nanotubes impregnated with 1-(2-pyridylazo)2-naphthol (PAN) for separation, preconcentration, and flame atomic absorption spectrometric determination of Pb(II) and Cu(II). Optimization of the method was done by investigating pH effect, amount of magnetic multiwalled carbon nanotubes impregnated with PAN, eluent type and volume, matrix effects, and volume of the sample. The optimum adsorbent amount was found to be 75 mg and the optimum pH value was found as 5.5. The detection limits were 16.6 μg L for Pb(II) and 18.9 μg L for Cu(II). The relative standard deviations (RSD%) were less than 4%. Two certified reference materials: SPS-WW2 wastewater and NCS-DC73349 (bush branches and leaves) were used to test the validation of the method. The method was successfully applied to the analysis of Pb(II) and Cu(II) ions in daisy, mint, paprika, sage, rosemary, daphne leaves, heather, green tea, andsamples.
本研究开发了一种基于使用负载1-(2-吡啶偶氮)-2-萘酚（PAN）的磁性多壁碳纳米管的新型固相萃取方法，用于分离、预富集以及火焰原子吸收光谱法测定Pb(II)和Cu(II)。通过研究pH效应、负载PAN的磁性多壁碳纳米管用量、洗脱剂类型和体积、基体效应以及样品体积对该方法进行了优化。发现最佳吸附剂用量为75 mg，最佳pH值为5.5。Pb(II)的检测限为16.6 μg/L，Cu(II)的检测限为18.9 μg/L。相对标准偏差（RSD%）小于4%。使用两种有证标准物质：SPS-WW2废水和NCS-DC73349（灌木枝叶）来检验该方法的有效性。该方法成功应用于雏菊、薄荷、辣椒粉、鼠尾草、迷迭香、瑞香叶、石南、绿茶以及样品中Pb(II)和Cu(II)离子的分析。
