[Investigations on ashing of animal tissues for the determinations of trace metals by means of polarography or atomic-absorption spectrometry (author's transl)].

A comparison has been made of three ashing methods for animal tissues with subsequent determination of minute quantities of metals by polarography or atomic-absorption spectrometry. Wet oxidation method with many disadvantages and few advantages has been shown not to be useful for the purpose. Both dry ashing in a muffle-furnace at 530 degrees C and low-temperature ashing are equally applicable to atomic-absorption spectrometry, but dry ashing in a furnace is more excellent with polarography. For obtaining ashes with constant compositions it is far more difficult with low-temperature ashing than with dry ashing in a furnace. Hence, dry ashing in a furnace is most widely applicable.