Post-column hydride formation

The use of an on-line hydride formation step in the injection port under GC-DCP conditions would permit reaction detection together with GC-DCP determinations [62]. This has already been described for related Sn speciation studies in GC-FPD. It will prove practical for many other elemental species, wherein these are capable of undergoing hydride formation in reaction GC-DCP Future work should perhaps be directed to improving MDLs in the HPLC mode, since these would appear adequate for >90% of our current samples via direct GC-DCP approaches. In this regard, there are at least three avenues of approach that come to mind. Post-column hydride formation will only work for a certain limited number of elements, less than 10, but when it does work, it works quite well and automatably. Electrothermal vaporization with HPLC-DCP is problematic, in that it still requires a discontinuous, non-automatable, histogram type approach. Fractions are directed... 

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