Table 5.

Accuracy and precision of ChA in faeces samples.

Added concentration (μg/mL)	Mean measured concentration (μg/mL)	Accuracy (%)	RSD (%)
Intraday (n = 6)
129.2	128.4	99.4	0.23
12.92	13.17	101.9	2.1
1.292	1.276	98.8	3.75
0.646	0.677	104.8	2.94
Interday (n = 24)
129.2	128.7	99.6	1.35
12.92	12.97	100.4	3.59
1.292	1.206	93.3	6.48
0.646	0.665	102.9	6.66