Cloud point extraction for the spectrophotometric determination of phosphorus(V) in water samples

Application of solidification of floating organic drop microextraction for inorganic anions: Determination of phosphate in water samples

“…Despite the great progress made in the development of modern microextraction techniques, only a few related studies focused on phosphate determination were found in the literature, namely cloud point extraction of phosphomolybdenum blue using the nonionic surfactant Triton X-114 [22], extraction of the ion pair formed between 12-molybdophosphate and malachite green into a methyl isobutyl ketone followed by microvolume spectrophotometry [23], directly suspended droplet microextraction combined with energy-dispersive X-ray fluorescence spectrometry [24], and dispersive micro-solid phase extraction of ortho-phosphate ions onto magnetite nanoparticles followed by determination as its molybdenum blue complex [25] (Table 3). When compared with existing solvent microextraction techniques (Table 3), the suggested method has a comparable linear range and a comparable or better detection limit, does not require sophisticated, expensive or special equipment neither complicated procedure, enables the use of a larger volume of sample, and uses a solvent less soluble in water.…”

Determination of Allura red in food samples after cloud point extraction using mixed micelles

“…This type of extraction by the cloud point method was initially described by Watanabe and Tanaka for the preconcentration of Zn(II) using 1-(2-pyridylazo)napthol (PAN) as a ligand and PONPE as an extractant. Recently, cloud point technique has been successfully employed for the purification, determination and preconcentration of different species of biological interest (Afkhami & Noroozi-Asl, 2009;Sume, Narin, Soylak, Yuruk, & Dgan, 2007), organic compounds such as phenols, polycyclic aromatic hydrocarbons and polychlorinated compound (Pan, Wang, Zu, Wu, & Qi, 2010;Purkait, DasGupta, & De, 2006), radionuclide (Pepper, Peterman, Tranter, & White, 2009) and dyes Pourreza & Elhami, 2007).…”

Trace Level Arsenic Quantification through Cloud Point Extraction: Application to Biological and Environmental Samples

“…This reaction has been proposed based on the phosphate's reaction with molybdate to form phosphomolybdenum blue in acidic medium and its application to water samples through cloud point extraction [15]. The reaction has been explored to develop a simple and sensitive spectrophotometric method to measure arsenic at nanogram level concentrations.…”