University of North Florida
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Stuart Chalk, Ph.D.
Department of Chemistry
University of North Florida
Phone: 1-904-620-1938
Fax: 1-904-620-3535
Email: schalk@unf.edu
Website: @unf

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Inorganic compound

Classification: Inorganic compound -> phosphoric acid

Citations 4

"Flow Apparatus For Monitoring Dissolution Rate Curves Using Ion-exchange Resins. 1. Phosphite Dissolution Rate Curve"
Analyst 1990 Volume 115, Issue 6 Pages 765-769
N. P. Evmiridis and E. D. Economou

Abstract: The system comprised a carrier stream of water or aqueous acidic solution, flowing through a cell containing a glass pH micro-electrode, and a syringe containing Dowex HGR-W2 ion-exchange resin, for exchange of metal ions for H+ for subsequent injection into the carrier stream. Two injections were made per sample, one before and one after ion exchange. The calibration graph was rectilinear for pH 1 to 5. The method was reasonably accurate, reproducible, rapid and simple. The method can be applied to determine a wide range of metal ion concentration. and can be made selective for one ion in the presence of others by pre-complexation. The method is applicable to study dissolution rate curves, and was applied to the dissolution of CaCO3 in H3PO4 as an example.
Calcium carbonate Resin Dissolution rate pH Calibration Selectivity Complexation Dowex

"Multi-element Analysis Using Flow Injection Inductively Coupled Plasma Mass Spectrometry: Analytical Aspects Of Multi-element Determinations In Highly Concentrated Solutions Of Phosphoric Acid, Sodium Phosphate And Sodium Nitrate"
Spectrochim. Acta B 1994 Volume 49, Issue 2 Pages 171-184
Huub Klinkenberg, Ton Beeren and Werner Van Borm

Abstract: Trace element concentrations of 51 elements in a matrix solution comprising 15% H3PO4, 16% NaNO3 and 6% Na3PO4 were determined by flow injection ICP-MS using an addition calibration method. A modified Perkin-Elmer Sciex Elan 500 instrument and an Eppendorf EVA flow injection system were used. The method did not have any of the disadvantages usually encountered with the continuous aspiration of very concentrated solution. Detection limits were of the order of 1-2 ng/ml.
Trace elements Mass spectrometry Multielement Interferences

"Determination Of Germanium, Palladium And Platinum In Highly Concentrated Solutions Of Phosphoric Acid And Ammonium Nitrate By Flow Injection Inductively Coupled Plasma Mass Spectrometry (FI ICP-MS)"
Spectrochim. Acta B 1991 Volume 46, Issue 6-7 Pages 1051-1061
Zicheng Peng, H. Klinkenberg, T. Beeren and W. Van Borm

Abstract: The elements in a solution containing 2.5 M H3PO4 and 1.5 M NH4NO3 were mixed with a standard addition solution of the elements and an internal standard of 103Rh. The mixture was merged with a carrier stream of 1% HNO3 and passed into the nebulizer. Two standard samples containing 10 and 20 ng mL-1 of the elements gave an average coefficient of variation (n = 5) of ~7%. The limits of detection were between 0.2 and 1.0 ng mL-1.
Germanium Palladium Platinum Mass spectrometry Nebulizer Internal standard

"Determination Of The Phosphorus Content In The Wet Process For Phosphoric Acid Production By Flow Injection Analysis"
Huazhong Shifan Daxue Xuebao (Ziran Kexue Ban) 1988 Volume 22, Issue 2 Pages 182-186
Chen, Yeqing; Zhao, Tingren; Du, Yunqing (SFS)

Abstract: A method of FIA (Flow Injection Analysis) employed to measure the phosphorus content in the technological process of numid-phosphorue acid has been described in this paper. This mixture of ammonium molybdate and ammonium vanadate is served as a developer and a solution 0.48 mol L-1 hydrochloric acid as the carrier steam, in the method, which has been applied to the acid-solution and the extracted residual solution. The content of phosphorus ranging from 0 to 500rag/1 is able to be determined with satisfied results, which can be printed out directly by a computer. The datas obtained from the method are in agreement with those from the neutral titration.
Phosphorus Spectrophotometry