Determination of phosphate by flotation-fluorophotometry using ion-pair of molybdophosphate with Rhodamine 6G

Preconcentration of phosphate ion onto ion-imprinted polymer

“…The scientist attempts have been made at the preconcentration of phosphate [14][15][16]. The solvent extraction [9,17] and solid phase extraction with an ion associate complex [8] have used and several reagents have been reported, such as Malachite Green [18], Crystal violet [19], Rhodamine 6G [8,9,17] and Rhodamine B [20] for the preconcentration of phosphate. Some carriers have used in solid phase extraction, such as an organic soluble membrane filter [8].…”

“…The concentration of phosphate in environmental water usually ranges from ten to several tens ng mL −1 [2]. Several alternative methods have also been developed for measuring low concentration of phosphate in a matrix, including ion exchange chromatography [3,4], gas chromatography with the phosphine generation system [5,6], amperometric detection [7], fluorometry [8,9] and enzymatic reaction [10,11], molybdenum blue methods [12] and flow injection [13].…”

Phosphate Determination in Aqueous Samples by Complex Formation with Rhodamine B

“…Un-complexed Rhodamine B produces a lot of fluorescence itself. To overcome this problem Nasu, et al, have used phase extraction of the complex from methanol into ether [25]. Excitation of the extracted complex was achieved at 554 nm and fluorescence was measured at 573 nm.…”