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首页> 外文期刊>International journal of environmental analytical chemistry >Solid-phase extraction of Pb2+ ion from environmental samples onto L-AC-Ag-NP by flame atomic absorption spectrometry (FAAS)
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Solid-phase extraction of Pb2+ ion from environmental samples onto L-AC-Ag-NP by flame atomic absorption spectrometry (FAAS)

机译：火焰原子吸收光谱法（FAAS）从环境样品中固相萃取Pb2 +离子到L-AC-Ag-NP上

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摘要

The development of a solid-phase extraction (SPE) procedure for the pre-concentration of trace amounts of Pb2+ ion on 2-furan-2-yl-1-furan-2-ylmethyl-1H-benzoimidazole loaded on activated carbon modified with silver nanoparticles (L-AC-Ag-NP) was presented. The metal ion retained on the sorbent was quantitatively determined via complexation with the ligand. The complexed metal ion was efficiently eluted using 10mL of 4molL(-1) sulphuric acid in 10w/v% acetone. The influences of the analytical parameters, including pH, amounts of the ligand and the solid phase, eluent conditions and sample volume, on the recoveries of the metal ion were optimised. Using the optimised parameters, the linear response of the SPE method for Pb2+ ion were in the ranges of 0.2-160 mu gL(-1), and the detection limit for Pb2+ ion was 0.034 mu gL(-1). The proposed method exhibits a pre-concentration factor (PF) of 80 and an enhancement factor of 30 for Pb2+ ion. The presented results demonstrate the successful application of the proposed method for the determination of Pb2+ ion in some real samples with high recoveries (>93%) and reasonable relative standard deviation (RSD<2%).
机译：固相萃取（SPE）方法的开发，用于在负载有银修饰的活性炭上的2-呋喃-2-基-1-呋喃-2-基甲基-1H-苯并咪唑上预富集痕量的Pb2 +离子介绍了纳米粒子（L-AC-Ag-NP）。保留在吸附剂上的金属离子通过与配体络合进行定量测定。在10w / v％的丙酮中使用10mL的4molL（-1）硫酸有效地洗脱了络合的金属离子。优化了分析参数（包括pH，配体和固相的量，洗脱条件和样品量）对金属离子回收率的影响。使用优化的参数，SPE方法对Pb2 +离子的线性响应在0.2-160μgL（-1）的范围内，对Pb2 +离子的检出限为0.034μgL（-1）。所提出的方法对Pb2 +离子具有80的预浓系数（PF）和30的增强系数。提出的结果证明了该方法在某些高回收率（> 93％）和合理的相对标准偏差（RSD <2％）的实际样品中测定Pb2 +离子的成功应用。

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