The results showed that the recovery was between 75.8% and 119.2%, the coefficient of variation was 5.6%～11.2%, and the detection limits of the method were 0.126～0.642 ng·g-1. The data of accuracy and repeatability are satisfied for analysis on the trace amounts of organic contaminants in marine organisms.
Our results show that trace-level pollutants in air samples can be concentrated and analyzed by taking advantage of the good adsorption property of some chromatographic stationary phase (such as porous polymer beads) and the excellent desorption characteristics of supercritical fluid extraction.
A method for trace level analysis of Microcystins in water using SPE and HPLC has been developed, which is fast, sensitive and suitable for the determination of the two most common Microcystins, MC-LR and MC-RR. This method enables the absolute determination of Microcystins even at the level as low as 1.00 ng, and the linear range is from 0.125 to 50 μg/L.