Magnetic dual task-specific polymeric ionic liquid nanoparticles for preconcentration and determination of gold, palladium and platinum prior to their quantitation by graphite furnace AAS

摘要: The authors describe a hybrid of magnetic task-specific poly(ionic liquid) containing dual sites in an approach to both preconcentrate and quantify gold(III), palladium(II) platinum(IV). was obtained by successive alkaline coprecipitation, sol-gel, quaternization, elimination, anion exchange polymerization. material characterized scanning electron microscopy, transmission FTIR spectroscopy, thermal gravimetric analysis, X-ray photoelectron spectrometry, diffractometry, vibrating sample magnetometry. It applied as effective sorbent for solid-phase extraction platinum(IV) ions. effects pH, amount adsorbent, time, eluent concentration volume were optimized. Following elution with thiourea/HCl solution, the ions quantified graphite furnace AAS. calibration plot is linear 50 350 ng·L−1 gold(III) range, 650 ng·L−1 150 2100 ng L−1 platinum(IV), respectively. Other figures merit noble metals determination, respective, include (a) detection limits at 19.7, 22.3 107.0 ng·L−1, (b) enrichment factors 197, 174 168; (c) reproducibilities (expressed relative standard deviations) 2.1%, 1.4% 1.5%. In our perception, method excels its high sensitivity preconcentration capability. successfully determination certified reference materials (spiked) real samples.