pH values of muscle were measured at 45 min, 1 d, 7 d, 14 d and
21 d postmortemusing a portable pHmeter (SenvenGo,Mettler Toledo,
Switzerland)whichwas calibrated in bufferswith pH 4.00 and 7.00 and
inserted into the center of meat samples. Each sample was measured
three or more times.