Highly sensitive flow analysis determination of orthophosphate using solid phase enrichment of phosphomolybdenum blue without need for organic solvents in elution

Trace and ultratrace analysis methods for the determination of phosphorus by flow-injection techniques

“…A signal improvement factors of 30-50 could be achieved. However, the detection limit was not so improved: LOD was 0.2 g/l of phosphorus [79].…”

“…The MG method coupled with solvent extraction/FIA enabled to determine phosphate at several nanomolar levels of phosphorus, and was applied to river water analysis [76]: LOD was 0.1 g/l of phosphorus. The MG ion associate was enriched on-line on a solid phase, such as Shephadex (cyclodextrin derivatives) packed in a flow-through cell [77], molybdenum blue on polymer beads packed in a syringe [78] and styrene-divinylbenzene polymer packed in a short desk (1.6 mm) [79]. A signal improvement factors of 30-50 could be achieved.…”

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.…”

Ultratrace determination of phosphorus in ultrapurified water by a slope comparison method

“…Phosphomolybdenum blue method, either with or without solid phase enrichment has been used for the phosphorus and silicate determination [1][2], however the procedure is often troublesome. The sensitive spectrophotometric method based on ion associates with basic dyes deserve attention.…”