Ionic liquid-based cloud point extraction five organophosphorus pesticides in coarse cereals

•A method for the analysis of five OPPs in coarse cereals by IL-CPE was developed.•IL-based CPE provided good recoveries and LODs of the OPPs in coarse cereals.•The method is economical, safe, efficient and environmental friendly. Organophosphorus pesticides will not only affect human health, but will also have serious impacts on the ecological environment. A simple, economical, safe, efficient, green and pollution-free and highly sensitive method was successfully established to analyze organophosphorus pesticides in different coarse cereals’ samples. Under the optimal experimental conditions, the method was linear, the correlation coefficient are higher than 0.9639. The detection limits of trichlorfon, chlorpyrifos, phoxim, fenthion, and diazinon were 2.6, 2.0, 4.3, 2.0, and 2.8 μg/kg. The recoveries ranged from 92.8 to 105.2%, the relative standard deviation is less than 5.2%. The results obtained show that the proposed method has the advantages of economy, safety, green and pollution-free, high recovery efficiency, simple use of the instrument, simple operation, and can be used with many subsequent instruments.