Table 5.

Accuracy and precision of the method in each milk matrix.

Analyte	Spiked standard conc. (ng/mL)	Intraday precision and accuracy (n = 3)			Interday precision and accuracy (n = 9)
		Mean % recovery ± SD	RSD (%)a	Er (%)b	Mean % recovery ± SD	RSD (%)a	Er (%)b
Cow milk
OXY	0.25	97.69 ± 2.01	0.82	− 2.31	94.79 ± 9.65	4.07	− 5.21
	0.5	96.82 ± 5.78	1.19	− 3.18	98.08 ± 11.27	2.30	− 1.92
	0.7	101.01 ± 9.91	1.40	1.01	99.88 ± 14.45	2.07	− 0.12
TTR	0.25	97.58 ± 1.03	0.42	− 2.42	96.81 ± 5.6	2.31	− 3.19
	0.5	100.15 ± 8.39	1.68	0.15	99.18 ± 7.54	1.52	− 0.82
	0.7	100.44 ± 5.66	0.80	0.44	100.12 ± 10.66	1.52	0.12
CTC	0.25	96.84 ± 1.54	0.64	− 3.16	95.75 ± 4.11	1.72	− 4.25
	0.5	98.50 ± 1.59	0.32	− 1.50	97.3 ± 5.63	1.16	− 2.70
	0.7	101.13 ± 8.67	1.22	1.13	99.49 ± 10.95	1.57	− 0.51
Camel milk
OXY	0.25	99.01 ± 3.16	1.27	− 0.99	99.12 ± 3.86	1.56	− 0.88
	0.5	101.37 ± 6.23	1.23	1.37	102.16 ± 6.17	1.21	2.16
	0.7	100.93 ± 5.59	0.79	0.93	101.78 ± 7.65	1.07	1.78
TTR	0.25	99.53 ± 1.14	0.46	− 0.47	96.7 ± 5.93	2.45	− 3.3
	0.5	100.97 ± 5.18	1.03	0.97	99.69 ± 8.98	1.8	− 0.31
	0.7	100.76 ± 3.84	0.54	0.76	98.79 ± 11.24	1.63	− 1.21
CTC	0.25	102.19 ± 2.36	0.92	2.19	100.04 ± 5.48	2.19	0.04
	0.5	101.87 ± 3.96	0.78	1.87	102.09 ± 6.64	1.3	2.09
	0.7	100.83 ± 2.22	0.32	0.83	100.14 ± 11.5	1.64	0.14
Goat milk
OXY	0.25	100.85 ± 5.2	2.06	0.85	101.53 ± 3.78	1.49	1.53
	0.5	97.04 ± 5.63	1.16	− 2.96	97.91 ± 7.64	1.56	− 2.09
	0.7	98.65 ± 8.74	1.27	− 1.35	98.49 ± 8.5	1.23	− 1.51
TTR	0.25	101.91 ± 5.28	2.07	1.91	99.998 ± 7.28	2.91	− 0.002
	0.5	97.22 ± 3.29	0.68	− 2.78	96.69 ± 3.08	0.64	− 3.31
	0.7	99.5 ± 1.48	0.21	− 0.5	99.96 ± 3.11	0.44	− 0.04
CTC	0.25	98.87 ± 3.95	1.6	− 1.13	101.12 ± 7.04	2.78	1.12
	0.5	97.88 ± 4.92	1.005	− 2.12	98.97 ± 11.12	2.25	− 1.03
	0.7	98.77 ± 3.08	0.45	− 1.23	98.48 ± 4.65	0.67	− 1.52

^aRSD (%) Percentage relative standard deviation.

^bEr (%) Percentage relative error.