DeterminationofAvermectinResidueintheAvermectinMycelialDregsand Research of its Harmless Treatment byHydrothermal Method
In this study, a simple and rapid analytical method of determination of avermectin residue in antibiotic mycelial dregs was developed by use of high performance liquid chromatography (HPLC). Hydrothermal treatment was also used to treat the dregs efficiently. Solid phase extraction (SPE) cleanup followed by HPLC was used to determine the avermectin residue in the dregs with acetonitrile/water=4/1(V/V) as extractant and HLB solid-phase extraction cartridges for purification. The results showed that the regression coefficient was 0.9996, the extraction recoveries of the target compounds were between 90.3% and 107.3%, the relative standard deviation ( RSD ) was ranged from 3.00% to 5.69%, and a linearity of 1.0~1000 mg/L was obtained. The orthogonal tests results indicated that under the conditions of temperature at 190 ℃ and treatment time of 2 h, avermectin residue of the dregs was reduced from 991.30 to 0.84 mg/kg, and the removal rate reached to 99.92%. In comparison with the standard for organic fertilizer, each indicator complied with the requirements except for water ratio. Therefore, this research provided theoretical basis for recovery and reuse of antibiotic mycelial dregs.
国家科技期刊平台
NSTL
万方数据
维普
