A planar solid phase extraction with visual light detection (pSPE–Vis) was developed to screen chlorinated paraffins (CP) in chocolate products and infant formula. The analysis of selected persistent organic pollutants, such as polychlorinated biphenyls, excluded co-elution with CP. Separation and detection of CP in the target zone were obtained after simple-to-perform sample preparation, including a sulfuric acid treatment. The validation study for CP showed recoveries near 100
