RESULTS AND DISCUSSION
Iron precipitation of phosphate in phosphate soluti
ons.
Iron precipitation of P in soil extracts was
performed in order to determine if the MS peak at 9
7 m/z was due to phosphate and not another ion. Re
sults showed
that after addition of iron, the ion peak at 97 m/z
was eliminated or significantly reduced. This ind
icates that MS
was likely detecting phosphate