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首页> 外文期刊>Journal of industrial and engineering chemistry >Multiwalled carbon nanotube impregnated with bis(5-bromosalicylidene)-l,3-propandiamine for enrichment of Pb~(2+) ion
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Multiwalled carbon nanotube impregnated with bis(5-bromosalicylidene)-l,3-propandiamine for enrichment of Pb~(2+) ion

机译：双（5-溴水杨基）-1,3-丙二胺浸渍的多壁碳纳米管富集Pb〜（2+）离子

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摘要

Multiwalled carbon nanotube impregnated by bis(5-bromosaIicylidene)-l,3-propandiamine (BBSPN) was synthesized and applied as adsorbent for the enrichment of trace amount of Pb~(2+) ion subsequent their determination by flame atomic absorption spectroscopy (FAAS). The influences of the analytical parameters including pH, amount of ligand and adsorbent, type and condition of eluent and sample volume on the Pb~(2+) ion recoveries were investigated. The optimum pH value for the separation of Pb~(2+) ion on the new sorbent was 6 and the adsorbed Pb~(2+) ion could be completely eluted by using 5.0 mL of 2.0 mol L~(-1) HNO3 solutions with 0.015 g of ligand and 0.100 g of adsorbent. Common coexisting ions did not interfere with the separation and determination of target metal ions. The method has high sorption-preconcentration efficiency with relative standard deviation less than 4.0%, especially for lead determination in radish, vegetable, potato, tomato and cheeps.
机译：合成了双（5-溴水杨基）-1,3-丙二胺（BBSPN）浸渍的多壁碳纳米管，并将其用作吸附剂以富集痕量的Pb〜（2+）离子，然后通过火焰原子吸收光谱法（FAAS）测定）。研究了pH，配体和吸附剂的数量，洗脱液的类型和条件以及样品量等分析参数对Pb〜（2+）离子回收率的影响。在新吸附剂上分离Pb〜（2+）离子的最佳pH值为6，使用5.0 mL的2.0 mol L〜（-1）HNO3溶液可以完全洗脱吸附的Pb〜（2+）离子。含0.015克的配体和0.100克的吸附剂。常见的共存离子不会干扰目标金属离子的分离和测定。该方法具有很高的吸附富集效率，相对标准偏差小于4.0％，特别适用于萝卜，蔬菜，马铃薯，番茄和小黄瓜中铅的测定。

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