Ma Jian-min
2014
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Journal
Chinese Journal of Health Laboratory Technology
Abstract
Objective To develop a method for the determination of sodium 2-( 4-methoxyphenoxy) propanoate in foods by solid-phase extractiom( SPE) and high-performance liquid chromatography( HPLC). Methods Samples were dissolved with ammonia solution( 1∶9,V / V) and purified by SPE cartridges. Chromatographic separation was performed on a Kromasil C18column( 250 mm × 4. 6 mm × 5 μm) using phosphoric acid solution( 1∶1,V / V,p H = 3. 0)-methanol as mobile phase.Detection was performed at 224 nm. Results Linearity was in the range of 0. 50 mg / L ~ 50. 0 mg / L with determination coefficient( r) of 0. 9995. Recoveries were in the range of 87. 4% ~ 99. 0%,and the relative standard deviations were less than5. 0%. The limit of quantification was 1. 0 mg / kg. Conclusion The developed method has the advantages of simple pretreatment,efficient separation and high reproducibility,and it can be applied to the routine analyses for the determination of sodium2-( 4-methoxyphenoxy) propanoate in foods.