title: Ultrasonic-assisted Supramolecular Solvent Liquid-liquid Microextraction for Inorganic Chromium Speciation in Water Samples and Determination by UV-Vis Spectrophotometry
abstract: A simple and fast ultrasonic-assisted green supramolecular solvent liquid-liquid microextraction method (UA-SS-LLME) was developed for the determination of Cr(VI) and Cr(III). A Cr(VI) stock solution was complexed with 1,5-diphenylcarbazide (DPC) reagent to form a metal ligand reaction, followed by UV-Vis spectrophotometric analysis at 540 nm. Tetrahydrofuran (THF) and decanoic acids were also used for the microextraction of chromium speciation. Cr(III) was oxidized to Cr(VI) by using H 2 SO 4 f
journal: Atomic Spectroscopy