Analysis of anions in alkaline solutions by ion chromatography after solid-phase extraction.
An Ion Chromatographic (IC) method for the determination of six organic acids and three inorganic anions in alkaline solutions was reported. Formic, acetic, propionic, oxalic, succinic, glutaric acid, F-, Cl-, and SO4(2-) were separated and determined in 33 min. The analytes were removed from Bayer liquor by using an ion-exchange resin column. The chromatographic separation was achieved with only one IonPac AS11-HC column thermostated at 30 degrees C. Organic acids and inorganic anions were detected with a suppressed conductance detector. The precision results' showed that the repeatability and reproducibility were < 2.94 and < 1.37%, respectively. The accuracy of the method was assessed by the recoveries ranging from 86.3 to 105.6%. Under optimum conditions the detection limits ranged from 0.008 to 0.053 mg/l.
Cao
Hui
H
School of Chemistry and Chemical Engineering, Nantong University, Nantong 226000, PR China.
Xiao
Jian Bo
JB
D000838:Anions / Q000032:analysis*; D002264:Carboxylic Acids / Q000302:isolation & purification; D002852:Chromatography, Ion Exchange / Q000295:instrumentation / Q000379:methods* / Q000592:standards*; D007287:Inorganic Chemicals / Q000302:isolation & purification; D052616:Solid Phase Extraction