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[Bone content in mechanically deboned pork (author's transl)].

The KOH method is a useful procedure to determine the bone content of pork. Samples containing a known quantity of added bone were tested by the KOH method. There were no significant differences between the results of the KOH method and the added bone content (P greater than 0.05). The correction for desiccation of clean bone is hard to determine because of the variations in loss of weight as a result of evaporation of water on preparing clean bone. The correction for conversion of hard bone residues into dry bone was determined from bones of fattening pigs, sows and male swine. Sex and age of the pigs were found to have little effect on this factor. It is suggested to base testing of mechanically deboned pork on the determination of hard bone residues. A content of 0.4 per cent is suggested as the maximum permissible residue of hard bone in mechanically deboned pork, which is equivalent to a clean bone residue of approximately 1 per cent.