A novel and effective dispersive solid-phase extraction (dSPE) procedure using tetraethylenepentaminefunctionalized
Fe3O4 magnetic polymer (TEPA-MP) as an efficient adsorbent for cleaning up the matrix in wine
was developed. Based on this, a simple and rapid analytical method for the simultaneous determination of nine
food additives (i.e., acesulfame, saccharin, caffeine, aspartame, benzoic acid, sorbic acid, stevioside, dehydroacetic
acid and neotame) inwine by reversed-phase high-performance liquid chromatography (RP-HPLC) with an ultraviolet
(UV) detectorwas established. The results showed that the recoveries of the acidic food additives (pKa b 7.0)
were highly dependent on the pH, and the TEPA-MP could be reused efficiently at least six times. Under optimized
conditions, the recoveries for all analytes were between 80.1 and 97.1%, the intra-day RSDs were in the range of
1.7–8.5% and the inter-day RSDs were between 1.7 and 9.8%, and all the analytes had good linearities in the tested
ranges with determination coefficients (r2) higher than 0.9991. The limits of quantification (LOQs) for the nine
food additives were between 0.17 and 0.92 mg/L. The developed method was successfully applied to the wine
samples, and it was confirmed that the TEPA-MP particles were highly effective dSPE materials.
A novel and effective dispersive solid-phase extraction (dSPE) procedure using tetraethylenepentaminefunctionalized
Fe3O4 magnetic polymer (TEPA-MP) as an efficient adsorbent for cleaning up the matrix in wine
was developed. Based on this, a simple and rapid analytical method for the simultaneous determination of nine
food additives (i.e., acesulfame, saccharin, caffeine, aspartame, benzoic acid, sorbic acid, stevioside, dehydroacetic
acid and neotame) inwine by reversed-phase high-performance liquid chromatography (RP-HPLC) with an ultraviolet
(UV) detectorwas established. The results showed that the recoveries of the acidic food additives (pKa b 7.0)
were highly dependent on the pH, and the TEPA-MP could be reused efficiently at least six times. Under optimized
conditions, the recoveries for all analytes were between 80.1 and 97.1%, the intra-day RSDs were in the range of
1.7–8.5% and the inter-day RSDs were between 1.7 and 9.8%, and all the analytes had good linearities in the tested
ranges with determination coefficients (r2) higher than 0.9991. The limits of quantification (LOQs) for the nine
food additives were between 0.17 and 0.92 mg/L. The developed method was successfully applied to the wine
samples, and it was confirmed that the TEPA-MP particles were highly effective dSPE materials.
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