Development and validation of a high-throughput high-performance liquid chromatographic assay for the determination of caffeine in food samples using a monolithic column
2006; Elsevier BV; Volume: 581; Issue: 1 Linguagem: Inglês
10.1016/j.aca.2006.07.081
ISSN1873-4324
AutoresParaskevas D. Tzanavaras, Demetrius G. Themelis,
Tópico(s)Electrochemical sensors and biosensors
ResumoThe present study reports the development and validation of a high-throughput high-performance liquid chromatographic (HPLC) assay for the determination of caffeine in food samples. The analyte was separated rapidly from sample matrix using a short monolithic column (50 mm x 4.6 mm i.d.). The flow rate was 3.0 mL min(-1), while the mobile phase consisted of ACN/water (10:90, v/v). Caffeine was detected directly at 274n m. Under the optimal HPLC conditions, the sampling rate was 60 h(-1). The assay was validated for linearity, LOD and LOQ, precision, selectivity and ruggedness. The case of external calibration versus standard addition for the analysis of real samples was also examined. The proposed assay was applied to the analysis of beverages and coffee samples.
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