Bubbles in Solvent Microextraction: The Influence of Intentionally Introduced Bubbles on Extraction Efficiency
- 5 August 2011
- journal article
- Published by American Chemical Society (ACS) in Analytical Chemistry
- Vol. 83 (17), 6713-6716
- https://doi.org/10.1021/ac201323z
Abstract
Significant improvements to microdrop extractions of triazine pesticides are realized by the intentional incorporation of an air bubble into the solvent microdroplet used in this microextraction technique. The increase is attributed partly to greater droplet surface area resulting from the air bubble being incorporated into the solvent droplet as opposed to it sitting thereon and partly to thin film phenomena. The method is useful at nanogram/liter levels (LOD 0.002-0.012 μg/L, LOQ 0.007-0.039 μg/L), is precise (7-12% at 10 μg/L concentration level), and is validated against certified reference materials containing 0.5 and 5.0 μg/L analyte. It tolerates water and fruit juice as matrixes without serious matrix effects. This new development brings a simple, inexpensive, and efficient preconcentration technique to bear which rivals solid phase microextraction methods.Keywords
This publication has 16 references indexed in Scilit:
- Miniaturized preconcentration methods based on liquid–liquid extraction and their application in inorganic ultratrace analysis and speciation: A reviewSpectrochimica Acta Part B: Atomic Spectroscopy, 2009
- Optimization of a single-drop microextraction procedure for the determination of organophosphorus pesticides in water and fruit juice with gas chromatography-flame photometric detectionTalanta, 2006
- Cost analysis of ELISA, solid-phase extraction, and solid-phase microextraction for the monitoring of pesticides in waterEnvironmental Research, 2005
- Immersed solvent microextraction and gas chromatography–mass spectrometric detection of s-triazine herbicides in aquatic mediaAnalytica Chimica Acta, 2005
- Determination of aliphatic amines in water by gas chromatography using headspace solvent microextractionTalanta, 2005
- Hollow fiber membrane-protected solid-phase microextraction of triazine herbicides in bovine milk and sewage sludge samplesJournal of Chromatography A, 2004
- Liquid-Phase Microextraction in a Single Drop of Organic Solvent by Using a Conventional MicrosyringeAnalytical Chemistry, 1997
- Mass Transfer Characteristics of Solvent Extraction into a Single Drop at the Tip of a Syringe NeedleAnalytical Chemistry, 1997
- Solvent Microextraction into a Single DropAnalytical Chemistry, 1996
- Liquid Droplet. A Renewable Gas Sampling InterfaceAnalytical Chemistry, 1995