猪肉、牛肉结缔组织和脂肪组织的折射测定法。

Refractometry of pork muscle and beef connective and adipose tissue.

机构信息

Department of Food Science, University of Guelph, Guelph, Ontario, Canada N1G 2W1.

出版信息

Meat Sci. 2002 Oct;62(2):225-8. doi: 10.1016/s0309-1740(01)00250-9.

PMID:22061415

Abstract

Bulk refractive index (RI) was measured with an Abbe refractometer using a red laser for transmittance (T) and a green laser for reflectance. The critical angle, although obscured by scattering, was detected subjectively at the red-green boundary. The refractometer also was operated under computer control, detecting RI photometrically. Pork longissimus thoracis (n=20) had higher RI than biceps femoris (1.357±0.004 versus 1.352±0.005, respectively, P<0.001). Longissimus thoracis also had lower Japanese pork colour scores (JPCS) than biceps femoris (2.92±0.37 versus 3.87±0.48, respectively, P<0.001). In pooled samples (n=40), RI was correlated with JPCS, r=-0.55, P<0.001. RI of bovine tendon (n=10) was higher than for adipose tissue (1.415±0.009 versus 1.343±0.001, P<0.001). Refraction may contribute to the inverse relationship between meat pH and paleness, and may affect signals from fibre-optic meat probes.

摘要

使用阿贝折射仪测量块状折射率 (RI)，红色激光用于透射 (T)，绿色激光用于反射。尽管临界角被散射掩盖，但在红-绿边界处可以主观检测到。折射仪也在计算机控制下运行，通过光度法检测 RI。猪背最长肌 (n=20) 的 RI 高于股二头肌 (1.357±0.004 对 1.352±0.005，P<0.001)。背最长肌的日本猪肉色评分 (JPCS) 也低于股二头肌 (2.92±0.37 对 3.87±0.48，P<0.001)。在合并样本 (n=40) 中，RI 与 JPCS 呈负相关，r=-0.55，P<0.001。牛肌腱 (n=10) 的 RI 高于脂肪组织 (1.415±0.009 对 1.343±0.001，P<0.001)。折射可能有助于肉 pH 值和苍白度之间的反比关系，并可能影响光纤肉类探测器的信号。