Quantitative Bestimmung geringer Phosphatmengen in Trinatrium-Phosphonoformiat mittels 31P-NMR-Spektroskopie

Determination of Small Quantities of Residue Phosphate in Tris-Sodium Phosphane Formiate by Means of ³¹P NMR Spectroscopy The concentration of residue phosphate in tris-sodium-phosphon-formiate (TPF·6H₂O) water solutions has been determined via comparing integration of the ³¹P n.m.r. signal of the residue phosphate and one of the ³¹C NMR satellites of the TPF·6H₂O ³¹P n.m.r. signal. The ³¹P n.m.r. spectra have been obtained in inverse gated detection mode; statistical methods of validation prove the certainty of the phosphate concentrations obtained to be excellent and strongly recommend the quantitative method employed for the detection of concentrations down to 0,1%.