Research Article

Detection of Stress Hormone in the Milk for Animal Welfare Using QCM Method

Table 1

Surface treatment conditions and their properties of contact angle and the delta meaning frequency differences between Ch1 and Ch2 on the injection of 10 vol%-plain-milk-containing sample.

1st reagent2nd reagentContact angle [°]Delta [Hz]

(a)N102, 1/3Not used55−44
(b)IASNot used61.436
(c)Casein, 0.25 wt%Not used58.2−10
(d)Plain milk, 1/10Not used45−20
(e)N102, 1/3Plain milk, 1/1061.1−2
(f)N102, 1/3Skimmed milk57.3−2.2
(g)N102, 1/3Casein, 0.25 wt%58.8−4