TY - JOUR
T1 - Determination of phosphorus in aqueous solution via formation of the phosphoantimonylmolybdenum blue complex. Re-examination of optimum conditions for the analysis of phosphate
AU - Drummond, L.
AU - Maher, W.
PY - 1995
Y1 - 1995
N2 - This paper describes an investigation of the conditions affecting the determination of phosphate using the reduced phosphoan-timonylmolybdic acid method. The aim was to develop a determination method with faster kinetics than the original procedure of Murphy and Riley, for automation using flow-injection analysis. Optimum colour formation was found to occur at [H+] [MoO2-4] ratios between 50-80 at all pH values tested (0.36-1.06). The maximum rate of formation occurs at a sol[H+] [MoO2-4] ratio of 70 within a pH range of 0.57-0.88 when an antimony concentration greater than 0.06 mM and ascorbic acid concentration greater than 0.009 M in the final solution are used. Full colour development occurs within 0.8-1 min. The ascorbic acid reagent was found to be stable for 30 days. The results of the study indicated that by suitable selection of reagent conditions, rapid chromophore development can be achieved. © 1995.
AB - This paper describes an investigation of the conditions affecting the determination of phosphate using the reduced phosphoan-timonylmolybdic acid method. The aim was to develop a determination method with faster kinetics than the original procedure of Murphy and Riley, for automation using flow-injection analysis. Optimum colour formation was found to occur at [H+] [MoO2-4] ratios between 50-80 at all pH values tested (0.36-1.06). The maximum rate of formation occurs at a sol[H+] [MoO2-4] ratio of 70 within a pH range of 0.57-0.88 when an antimony concentration greater than 0.06 mM and ascorbic acid concentration greater than 0.009 M in the final solution are used. Full colour development occurs within 0.8-1 min. The ascorbic acid reagent was found to be stable for 30 days. The results of the study indicated that by suitable selection of reagent conditions, rapid chromophore development can be achieved. © 1995.
UR - https://www.scopus.com/inward/record.uri?eid=2-s2.0-0028835387&doi=10.1016%2f0003-2670%2894%2900429-P&partnerID=40&md5=8650ce1aacacfc71795b9684a1046c3e
U2 - 10.1016/0003-2670(94)00429-P
DO - 10.1016/0003-2670(94)00429-P
M3 - Article
SN - 0003-2670
VL - 302
SP - 69
EP - 74
JO - Analytica Chimica Acta
JF - Analytica Chimica Acta
IS - 1
ER -