Simultaneous determination of tylosin and josamycin residues in muscles, liver, eggs and milk by MLC with a monolithic column and time-programmed UV detection: application to baby food and formulae

Table 4 Assay of tylosin and josamycin in food samples using the proposed and reference methods

Method	TS		JM		TS		JM
Method	Prop.	Ref.	Prop.	Ref.	Prop.	Ref.	Prop.	Ref.
Sample type	Chicken muscle				Chicken liver
Mean recovery $(\bar{X})$ ^a	101.10	100.62	101.13	100.86	101.93	99.13	99.97	98.47
± S.D.	0.72	0.82	2.71	2.17	2.01	2.29	3.16	2.84
Variance	0.52	0.67	7.34	4.7	4.04	5.24	9.96	8.04
Students t-value^b	0.79		0.13		1.59		0.61
Variance ratio F-value^b	1.29		1.55		1.30		1.24
Sample type	Bovine muscle				Bovine liver
Mean recovery $(\bar{X})$ ^a	102.60	100.53	97.80	96.87	99.43	97.53	98.40	98.20
± S.D.	1.05	2.63	1.57	0.70	2.49	1.30	1.65	2.36
Variance	1.11	6.94	2.47	0.49	6.20	1.69	2.71	5.56
Students t-value^b	1.26		0.94		1.17		0.12
Variance ratio F-value^b	6.25		5.01		3.66		2.05
Sample type	Milk				Eggs
Mean recovery $(\bar{X})$ ^a	99.53	98.87	99.40	98.93	100.93	100.60	100.80	100.70
± S.D.	2.35	2.81	2.61	2.58	3.02	2.43	2.72	1.87
Variance	5.52	7.89	6.84	6.65	9.14	5.92	7.41	3.51
Students t-value^b	0.31		0.22		0.15		0.05
Variance ratio F-value^b	1.43		1.03		1.54		2.11
Sample type	Baby food				Baby formulae
Mean recovery $(\bar{X})$ ^a	100.03	99.70	99.67	98.03	98.00	97.03	98.80	97.37
± S.D.	2.51	1.90	3.07	1.98	2.85	1.91	1.35	1.80
Variance	6.30	3.61	9.40	3.94	8.13	3.64	1.83	3.24
Students t-value^b	0.18		0.77		0.49		1.10
Variance ratio F-value^b	1.75		2.38		2.23		1.77

ISSN: 2661-801X