Exploring Polypyrrole as Extraction Phase for Disposable Pipette Extraction Method for Multiclass Organic Micro-Pollutant Determination in River and Tap Water Using Gas Chromatography-Mass Spectrometry

Journal of the Brazilian Chemical Society

article

Huelsmann, Ricardo D.¹  Turazzi, Francielle C.²  Barra, Guilherme M. O.²  Carasek, Eduardo¹ 

[1] Departamento de Química, Universidade Federal de Santa Catarina;Departamento de Engenharia Mecânica, Universidade Federal de Santa Catarina

关键词: disposable pipette extraction;    DPX;    phthalate esters;    organophosphorus pesticides;    organochlorine pesticides;    endocrine disruptor compounds;   

DOI  :  10.21577/0103-5053.20200119

学科分类：内科医学

来源: SciELO

【 摘 要 】

The use of a polypyrrole (PPy) is described as an efficient extraction phase for disposable pipette extraction (DPX), in a fast and ruggedized analytical method for simultaneous determination of 18 organic micro-pollutants in water using gas chromatography-mass spectrometry (GC-MS). The DPX-blank pipettes were filled with PPy, a material produced through the chemical polymerization of PPy using iron(III) chloride hexahydrate. The optimized conditions were 5 extraction cycles with 600 µL of sample, adjusted to pH 9, and desorption with 150 µL of ethyl acetate using 7 cycles with the same aliquot. The calibration curves resulted in determination coefficient (R 2 ) higher than 0.9963, the limit of detection (LOD) ranged from 0.4 to 1.5 µg L −1 , and the limit of quantification (LOQ) were from 1.4 to 5.0 µg L −1 . Excellent results were obtained for repeatability (2.3 to 15%, for 5 µg L −1 ) and intermediate precision, varying the day of analyses (3.9 to 15.5%) and the pipette tip (3.4 to 22.4%). The analyte recovery ranged from 75.4 to 115.0% for river water, and from 74.9 to 116.2% for tap water, in three different levels of concentration. The DPX-GC-MS method with PPy was successfully applied to determine the 18 analytes in river and tap water from the cities of Joinville and Florianópolis, Santa Catarina, Brazil.

【 授权许可】

CC BY