Poly(etheretherketone)-turnings a novel sorbent material for lead determination by flow injection flame atomic absorption spectrometry and factorial design optimization

• Published in: Talanta (Oxford) 2010-05, Vol.81 (3), p.996-1002
• Main Authors: Anthemidis, Aristidis N., Adam, Ibrahim S.I., Zachariadis, George A.
• Format: Article
• Language: English
• Subjects: Adsorption; Analysis of Variance; Analytical chemistry; Applied sciences; Atomic absorption spectrometry; Certification testing; Chemistry; Chemistry Techniques, Analytical; Elution; Exact sciences and technology; Flow injection; Flow Injection Analysis - methods; Flow rate; Global environmental pollution; Ketones - analysis; Lead; Lead - analysis; Limit of Detection; Models, Chemical; Multivariate Analysis; On-line systems; PEEK; Pollution; Poly(etheretherketone); Polyethylene Glycols - analysis; Reproducibility of Results; Sampling; Separation; Solid Phase Extraction - methods; Sorbents; Spectrometric and optical methods; Spectrophotometry, Atomic - methods; Standard deviation; Time Factors
• ISSN: 0039-9140; 1873-3573
• DOI: 10.1016/j.talanta.2010.01.047

A novel hydrophobic sorbent material for on-line column preconcentration and separation systems coupled with atomic spectrometry was developed. Poly(etheretherketone) (PEEK) in the form of turnings was used as packing material and evaluated for trace lead determination in environmental samples. Sample and ammonium diethyl-dithiophosphate (DDPA) reagent were mixed on-line and the Pb(II)–DDPA complex was retained effectively on PEEK-turnings. Isobutyl methyl ketone (IBMK) was adopted for efficient analyte complex elution and subsequently transportation into the nebulizer–burner system for atomization. The developed sorbent material has shown, excellent chemical and mechanical resistance, fast adsorption kinetics permitting the use of high sample flow rates without significant loss of retention efficiency. For 120 s sample preconcentration time the sampling frequency was 20 h −1, the enhancement factor was 110, the detection limit (3 s) was c L = 0.32 μg L −1, and the relative standard deviation (RSD) was s R = 2.2%, at the 50.0 μg L −1 Pb(II) level. The accuracy of the developed method was evaluated by analyzing certified reference materials.