Sorry I missed you Kitta. There were several I failed to catch up with ... including lindsay s who I wanted to introduce myself to. I wasn't coughing too much but I was feeling a bit rubbish.

Interesting question Jambo ... the trace of oxalic acid in honey might well not change as the chemical is the same in generic oxalic acid and Api-Bioxal. The latter also contains glucose (which will already be present in honey, obviously) and an anti-caking agent (colloidal silica hydrate). There might be a slightly higher OA content, but honey varies anyway. I expect you could identify the powdered silica by mass spectroscopy, but the machines cost half a million quid ...