Table 7.

Stability of ChA in beagle urine under various storage conditions (Mean ± SD, n = 3).

Nominal conc. (μg/mL)	4 °C/8 h (extracted sample)	Room temp./6 h	−70 °C/3 freeze/thaw cycles	−70 °C/20 d
129.2	99.87 ± 0.38	99.84 ± 0.13	102.69 ± 0.69	96.78 ± 1.06
12.92	101.27 ± 0.92	100.28 ± 1.60	103.87 ± 1.25	100.65 ± 1.24
6.46	99.80 ± 0.78	102.17 ± 2.00	109.80 ± 14.79	101.32 ± 3.94