Mäki-Petäys O, Korkeala H, Alanko T, Sorvettula O
Veterinary Department, Ministry of Agriculture and Forestry, Vuorikatu, Finland.
Acta Vet Scand. 1991;32(1):123-9. doi: 10.1186/BF03547004.
The accuracy of portable pH meters and the nitrazine yellow method was compared with the reference method by determining the pH of 74 beef and 96 pork muscles. The pH was measured directly from the muscle. The results showed statistically significant differences (p less than 0.001) between the different electrometric combinations. Combinations of portable pH meters with puncture electrodes gave systematically higher pH values than the reference method. These differences were not very large but they may be of practical significance. The use of a piercing cover on the electrode to help the insertion of the electrode into the meat is not recommended, since it may cause a rise in pH values. Electrometric methods were found to be more precise than the nitrazine yellow method. On the basis of these findings there still is a need of further harmonization of the methods used for pH measurement of meat.
通过测定74块牛肉和96块猪肉肌肉的pH值，将便携式pH计和石蕊试纸法的准确性与参考方法进行了比较。pH值直接从肌肉中测量。结果显示，不同的电测组合之间存在统计学上的显著差异（p小于0.001）。便携式pH计与穿刺电极的组合给出的pH值系统地高于参考方法。这些差异不是很大，但可能具有实际意义。不建议在电极上使用穿刺盖来帮助将电极插入肉中，因为这可能会导致pH值升高。发现电测法比石蕊试纸法更精确。基于这些发现，仍然需要进一步统一用于肉类pH测量的方法。
