Solid-phase microextraction of heavy metals in natural water with a polypyrrole/carbon nanotube/1, 10-phenanthroline composite sorbent material

TALANTA

卷:188

Article

Rohanifar, Ahmad^1,3  Rodriguez, Lidia B.²  Devasurendra, Amila M.^1,3  Alipourasiabi, Niloofar²  Anderson, Jared L.⁴  Kirchhoff, Jon R.^1,3 

[1] Univ Toledo, Coll Nat Sci & Math, Dept Chem & Biochem, 2801 West Bancroft St, Toledo, OH 43606 USA

[2] Univ Toledo, Dept Chem & Environm Engn, Coll Engn, 2801 West Bancroft St, Toledo, OH 43606 USA

[3] Univ Toledo, Sch Green Chem & Engn, 2801 W Bancroft St, Toledo, OH 43606 USA

[4] Iowa State Univ, Dept Chem, Ames, IA 50011 USA

关键词: Solid-phase microextraction;    Electropolymerization;    Heavy metals;    Inductively coupled plasma-mass spectrometry;    Water analysis;   

DOI  :  10.1016/j.talanta.2018.05.100

来源: Elsevier

【 摘 要 】

A simple and sensitive method for simultaneous microextraction and determination of heavy metals using a new direct immersion solid-phase microextraction (DI-SPME) sorbent material combined with inductively coupled plasma mass spectrometry (ICP-MS) was investigated. In this method, sorbent coating composites were prepared by simultaneous electropolymerization of pyrrole on pencil lead in the presence of carbon nanotubes (CNTs) and different metal chelating ligands. Among the coatings evaluated, a polypyrrole coating with entrapped CNTs and the chelator 1, 10 phenanthroline allowed the determination of silver, cadmium, cobalt, iron, nickel, lead, and zinc. Parameters influencing microextraction efficiency including pH, extraction time, and desorption time were optimized. The linear dynamic ranges were 1-1000 mu g L-1 for Ag, 1-750 mu g L-1 for Cd, Pb, and Zn, and 1-500 mu g L-1 for Co, Fe, and Ni with limits of detection of 0.012-0.163 mu g L-1 and limits of quantification of 0.039-0.542 mu g L-1. The relative standard deviations (RSDs, n = 5) ranged from 1.85% to 5.01%. The effect of inorganic interferences on the determination of the heavy metals also was examined and finally, the method was successfully applied for the determination of heavy metals in real water samples.

【 授权许可】

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