Mobility of organotin pesticides: azocyclotin and cyhexatin in clayey and sandy soils from the Northern Paraná state—Brazil

Azocyclotin and cyhexatin are pesticides commonly used in mite control. However, these organotin compounds (OTC) highly harmful to the aquatic ecosystem supposedly mobile soil. In addition not existing defined rules of use, few studies have been carried out on organotins’ behavior environmental Liquid chromatography has pointed for OTC quantitation because gas chromatography’s thermal stability derivatization limitations. Hence, a new high-performance liquid method with photodiode array detection was developed quality assurance control performance assessment purposes. Hysteresis index (HI) mobilization factor were determined from sorption/desorption sandy clayey soils assess mobility risk. Mobilization observed two by applying dual-mode Freundlich–Langmuir model isotherms. showed greater mobility, 23% 19%, HI − 0.15 7.8 $$\times $$ 10 $$^{-4}$$ soil samples, respectively. Although practically immobile both it can be mobilized as an azocyclotin metabolite, increasing impact risk agricultural uses.