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• W1991949356 abstract "A simple and rapid dispersive liquid-liquid microextraction procedure based on an ionic liquid (IL-DLLME) was developed for selective determination of cobalt (Co) with electrothermal atomic absorption spectrometry (ETAAS) detection. Cobalt was initially complexed with 1-nitroso-2-naphtol (1N2N) reagent at pH 4.0. The IL-DLLME procedure was then performed by using a few microliters of the room temperature ionic liquid (RTIL) 1-hexyl-3-methylimidazolium hexafluorophosphate [C(6)mim][PF(6)] as extractant while methanol was the dispersant solvent. After microextraction procedure, the Co-enriched RTIL phase was solubilized in methanol and directly injected into the graphite furnace. The effect of several variables on Co-1N2N complex formation, extraction with the dispersed RTIL phase, and analyte detection with ETAAS, was carefully studied in this work. An enrichment factor of 120 was obtained with only 6 mL of sample solution and under optimal experimental conditions. The resultant limit of detection (LOD) was 3.8 ng L(-1), while the relative standard deviation (RSD) was 3.4% (at 1 microg L(-1) Co level and n=10), calculated from the peak height of absorbance signals. The accuracy of the proposed methodology was tested by analysis of a certified reference material. The method was successfully applied for the determination of Co in environmental and biological samples." @default.
• W1991949356 created "2016-06-24" @default.
• W1991949356 creator A5005650853 @default.
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• W1991949356 date "2010-03-01" @default.
• W1991949356 modified "2023-10-09" @default.
• W1991949356 title "Highly selective ionic liquid-based microextraction method for sensitive trace cobalt determination in environmental and biological samples" @default.
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• W1991949356 doi "https://doi.org/10.1016/j.aca.2010.01.012" @default.
• W1991949356 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/20171314" @default.
• W1991949356 hasPublicationYear "2010" @default.
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