LC-MS/MS METHOD FOR DETERMINATION OF L-Α-PHOSPHATIDYLCHOLINE FROM SOYBEAN
Keywords:
lecithin, α-phosphatidylcholine, soybean, solid-liquid extraction, detection limits, accuracyAbstract
The purpose of this study was to develop a quick procedure for the determination of α-phosphatidylcholine from soybean. The procedure is based on a simple solid-liquid extraction followed by a quick analytical method carried out with an LC-ESI-MS/MS system. A chromatographic column of 2×50 mm with a particle size of 2.5 µm was used. The LC-ESI-MS/MS method was developed in positive ionization mode. The analytical method was described in terms of linearity, detection and quantification limits, accuracy and precision and matrix effect. The calibration curve was developed in the range of 5 to 200 ng/ml with a correlation coefficient r2 of 0.995 and detection limit of 0.5 ng/ml. The extraction method was tested for the recovery degree. The recovery obtained was 97.2±1.2%. The method was used to determine the content of α-phosphatidylcholine from five soybean varieties from Romanian market. No significant differences were obtained between the five varieties regarding the α-phosphatidylcholine content.
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