Electro-driven extraction of inorganic anions from water samples and water miscible organic solvents and analysis by ion chromatography.
A simple electromembrane extraction (EME) procedure combined with ion chromatography (IC) was developed to quantify inorganic anions in different pure water samples and water miscible organic solvents. The parameters affecting extraction performance, such as supported liquid membrane (SLM) solvent, extraction time, pH of donor and acceptor solutions, and extraction voltage were optimized. The optimized EME conditions were as follows: 1-heptanol was used as the SLM solvent, the extraction time was 10 min, pHs of the acceptor and donor solutions were 10 and 7, respectively, and the extraction voltage was 15 V. The mobile phase used for IC was a combination of 1.8 mM sodium carbonate and 1.7 mM sodium bicarbonate. Under these optimized conditions, all anions had enrichment factors ranging from 67 to 117 with RSDs between 7.3 and 13.5% (n = 5). Good linearity values ranging from 2 to 1200 ng/mL with coefficients of determination (R(2) ) between 0.987 and 0.999 were obtained. The LODs of the EME-IC method ranged from 0.6 to 7.5 ng/mL. The developed method was applied to different samples to evaluate the feasibility of the method for real applications.
Faculty of Chemistry, Shahid Beheshti University, Tehran, Iran.
Saeed
S
Nojavan
Tina
T
Bidarmanesh
Farkhondeh
F
Memarzadeh
Soheila
S
Chalavi
D000838:Anions / Q000032:analysis*; D002852:Chromatography, Ion Exchange / Q000379:methods*; D055664:Electrochemical Techniques / Q000379:methods*; D006863:Hydrogen-Ion Concentration; D008567:Membranes, Artificial; D009930:Organic Chemicals / Q000737:chemistry; D012997:Solvents / Q000737:chemistry*; D014867:Water / Q000737:chemistry*
D000838:Anions; D008567:Membranes, Artificial; D009930:Organic Chemicals; D012997:Solvents; D014867:Water
Electromembrane extraction; Inorganic anions; Pure water; Water miscible organic solvents