Download full text in PDF Opens in a new window. Article suggestions will be shown in a dialog on return to ScienceDirect. ... Please enable JavaScript to use all the features on this page. ... Competetive reaction pathwys responsible for the incomplete flourination of serine by SF 4 elucidated and inhibited. ... HPLC - ion pairing conditions: EM RP-18 (10 μm) column, 250 mm (L) × 4.6 mm (D); mobile phase: aqueous sodium heptanesulfonate; ph 2.2.