Has anyone compared chromium vs. copper oxide as the oxidation catalyst in a Flash 1200? I used copper oxide without any difference in % and isotope CN results when I was running a 2 tube setup that had the reduced copper in the second tube, however, I have switched to a 1 tube packing scheme so there is not enough room for a lot of any 1 catalyst. The 1 tube packing goes chromium oxide, reduced copper, silvered cobaltous/ic oxide as describe in the Flash manual. Since I accidentally ordered a large amount of copper oxide (I really need to pay better attention sometimes) I was thinking of using it for the chromium in this configuration. My samples are typically 2 mg of dried plant material.


Todd Brown


700 Chesterfield Pkwy

Chesterfield MO 63017

Office 636 737-6397

FAX 636 737-4844


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