Analysis of mono- and diesters of o-phthalic acid by solid-phase extractions with polystyrene-divinylbenzene-based polymers.
Retention mechanisms of an unmodified and a hydroxylated polystyrene-divinylbenzene polymer were studied by solid-phase extraction of o-phthalic acid and some of its mono- and diesters from purified water and then analysing by GC-MS. The monoesters and phthalic acid were retained only when protonated (i.e. acidified with HCI to pH 0.9). Of all elution solvents tested, ethyl acetate gave the best overall recoveries (61-89%) with both polymers. Applicability to complex matrixes (e.g. acidogenic landfill leachates) was examined by introducing a washing step with acetone in acidified water (pH 0.9) to eliminate volatile fatty acids (C2-C6) from the cartridge. Finally, the method was tested on real samples.
Department of Water and Environmental Studies, Linköping University, Sweden. susjo@tema.liu.se
Susanne
S
Jonsso
Hans
H
Borén
D004952:Esters; D005227:Fatty Acids / Q000032:analysis; D010795:Phthalic Acids / Q000032:analysis*; D011108:Polymers / Q000737:chemistry*; D011137:Polystyrenes / Q000737:chemistry*; D020058:Styrene / Q000737:chemistry*
D004952:Esters; D005227:Fatty Acids; D010795:Phthalic Acids; D011108:Polymers; D011137:Polystyrenes; D020058:Styrene; C032279:phthalic acid