Microscale Synthesis of Fe(PF↓(3))↓(5) for Gas Source Mass Spectrometry

摘要

Down-scaling a cocondensation method to produce volatile pentakis (trifluorophosphine)iron(0) for measuring isotope ratios by gas source mass spectrometry is de-scribed. Starting from 1 0 mg of iron, this method allows synthesis of a sufficient amount of Fe(PF↓(3))↓(5) that can be used to measure iron content and/or isotope ratios in real-life samples. The advantage over thermal ionisation mass spectrometry is that more precise determinations of ratios/amounts are possible. Reproducibilities for n(↑(54)Fe)/ n(↑(56)Fe)(↑(57)Fe) are (1-3)×10↑(-4), while those obtained by thermal ionization mass spectrometry are at the 10↑(-3 level.)