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http://dx.doi.org/10.5012/bkcs.2012.33.12.3971

Determination of Fluorescent Whitening Agents in Paper Materials by Ion-Pair Reversed-Phase High-Performance Liquid Chromatography  

Kim, Jeong Soo (Department of Chemistry, Korea University)
Kim, Do Hwan (Division of Science Education, Daegu University)
Kim, Keon (Department of Chemistry, Korea University)
Publication Information
Bulletin of the Korean Chemical Society / v.33, no.12, 2012 , pp. 3971-3976 More about this Journal
Abstract
A simple method was developed for the analysis of seven stilbene-type fluorescent whitening agents (FWAs) in paper materials by ion-pair reversed-phase high-performance liquid chromatography with fluorescence detection. These stilbene-type FWAs included two disulfonate, two tetrasulfonate, and three hexasulfonate compounds. After optimization of chromatographic conditions, the FWAs were satisfactorily separated using a reversed-phase column (RP-18) with the following isocratic mobile phase: methanol-water (60:40) containing 17.5 mM TBABr and 10 mM citrate buffer (pH = 7.0). The calibration plot was linear in the range from 5 to 500 ng/mL for two disulfo-FWAs and from 1 to 500 ng/mL for the other five FWAs. Precision levels of the calibration curve as indicated by RSD of response factors were 1.2 and 8.1%. Limits of quantitation (LOQ) ranged from 1.2 to 11 ng/mL.
Keywords
Fluorescent whitening agents; Ion-pair chromatography; Paper materials;
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