Multiclass Pesticide Residue Analysis in Fruit and Vegetable Samples by Combining Acetone-Based Salting-Out Assisted Extraction with Dispersive Liquid-Liquid Microextraction

Figure 8

Effect of salt addition on the enrichment factors of pesticides from the tomato sample. Experimental conditions: 5 mL UHP water; 1000 µL acetone extract; 70 µL tetrachloroethylene; pH 7; centrifugation rate and time, 4000 rpm and 600 s, respectively; .