A Green Procedure Using Disposable Pipette Extraction to Determine Polycyclic Aromatic Sulfur Heterocycles in Water Samples and Solid Petrochemical Residues

A simple and efficient method using reduced amounts of solvents for the determination polycyclic aromatic sulfur heterocycles (PASHs) in aqueous matrices from a lagoon leachate solid waste petrochemical industry is proposed. The target analytes were previously concentrated disposable pipette extraction (DPX) technique applying gas chromatography-mass spectrometry (GC-MS) analysis. In this innovative approach, DPX was modified with 8-hydroxyquinoline silica gel immobilized PdII pre-concentration 4-methyldibenzothiophene, 4,6-dimethyldibenzothiophene, 1,2-naphtobenzothiophene, 2-methylbenzothiophene 3-methylbenzothiophene. To improve efficiency, parameters such as desorption solvent, ionic strength, cycles optimized. values obtained limits detection (LOD) quantification (LOQ) are adequate PASHs samples. Precision accuracy showed satisfactory results, providing relative recoveries 74.6-131.2% water samples 72.7-118.0% standard deviation (RSD) five ranged 0.3 to 9.2% 3.8 19.4% waste. These results demonstrate that proposed represents promising alternative