严忠雍, 曾军杰, 龙举, 方益, 陈思. Determination of Brevetoxins in Seawater by Liquid Chromatography-Tandem Mass Spectrometry with Liquid-Liquid Extraction[J]. 2019, 38(12): 1458-1463.
严忠雍, 曾军杰, 龙举, 方益, 陈思. Determination of Brevetoxins in Seawater by Liquid Chromatography-Tandem Mass Spectrometry with Liquid-Liquid Extraction[J]. 2019, 38(12): 1458-1463.DOI: doi:10.3969/j.issn.1004-4957.2019.12.008.
A liquid chromatography-tandem mass spectrometric(LC-MS/MS) method was developed for the detection of three brevetoxins
i.e.BTX-1
BTX-2 and BTX-3 in seawater based on liquid-liquid extraction.The analysis volume of seawater was reduced to 20 mL by using LC-MS/MS.The extraction conditions for three brevetoxins in seawater optimized with response surface were as follows:sodium chloride:6 g
vortex time:60 s
extraction solvent:5 mL ethyl acetate;and extraction times:twice.The linear ranges of three brevetoxins were all 1-200 μg/L
their limits of detection and quantitation were 0.02 μg/L and 0.05 μg/L
respectively.The average recoveries for three brevetoxins ranged from 95.4% to 104%
with intra-day and inter-day relative standard deviations(RSD) of 2.2%-5.3% and 3.0%-4.5%
respectively.With low consumption and high pretreatment efficiency
this method realizes the rapid analysis on trace of brevetoxins in seawater.