Spectrophotometric determination of iron species using ionic liquid ultrasound assisted dispersive liquid–liquid microextraction

A simple and efficient method for speciation and determination of iron in different water samples was developed. The method is based on ionic liquid ultrasound assisted dispersive liquid–liquid microextraction (IL-USADLLME) followed by spectrophotometric determination. Fe(II) is complexed with 2,4,6-tri(2’-pyridyl)-l,3,5-triazine (TPTZ), neutralized through ion pair formation with sodium dodecyl sulfate (SDS) and extracted into 1-hexyl-3- methylimidazolium hexafluorophosphate [C6MIM][PF6].