UHPLC-MS/MS Determination of 4-Hexylresorcinol in Shrimps with Solid Phase Extraction
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Abstract
UHPLC-MS/MS was applied to the determination of 4-hexylresorcinol in shrimps with solid phase extraction. Homogenized pulp (5.00 g) of the sample was extracted twice with methanol (10 mL each). 5 mL of the combined extract was taken,and then made up to 10 mL with water. The solution was purified by passing through PRIME HLB SPE column,and then eluted with 4 mL of mixture of methanol and acetonitrile (9+1) containing 1% (mass fraction) ammonia. The eluate was evaporated to near dryness by N2-blowing at 40℃ in the water bath.The residue was taken up with 1 mL of acetonitrile (6+4) solution. Waters Acquity UPLC BEH C18 chromatographic column was used as stationary phase, and the mixture of acetonitrile and water mixed in different ratios was used as mobile phase in gradient elution. ESI- and multi-reactions monitor mode were adopted in MS/MS. Linear relationship between values of peak area and mass concentration of 4-hexylresorcinol was kept in the range of 1.0-100.0 μg·L-1, with detection limit (3S/N) of 0.25 μg·kg-1. On the base of blank sample, test for recovery was made by standard addition method. Values of recovery found were in the range of 70.1%-88.6%, with RSD's (n=6) in the range of 3.8%-6.4%.
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