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

Table 3

Repeatability (intraday) and reproducibility (interday) of the developed method in spiked tomato samples.

	Carbofuran	Atrazine	Benalaxyl	Chlorpyrifos	4,4′-DDT	Bifenthrin
Tomato sample
Intraday (%RSD,)
Level 1	7.7	6.8	7.1	5.8	4.3	4.2
Level 2	6.8	6.2	2.9	7.3	6.7	7.1
Level 3	6.4	7.1	4.9	6.5	8.0	8.0
Interday (%RSD,)
Level 1	7.7	5.9	6.5	7.3	9.0	7.4
Level 2	8.1	6.6	7.8	9.5	4.9	8.2
Level 3	6.9	6.3	7.6	5.7	8.6	5.0

Level 1: 60 µg/kg for atrazine, benalaxyl, chlorpyrifos, 4,4′-DDT, and bifenthrin and 120 µg/kg for carbofuran. Level 2: 200 µg/kg for atrazine, benalaxyl, chlorpyrifos, 4,4′-DDT, and bifenthrin and 400 µg/kg for carbofuran. Level 3: 500 µg/kg for atrazine, benalaxyl, chlorpyrifos, 4,4′-DDT, and bifenthrin and 1000 µg/kg for carbofuran.