Table 2.

Recovery, standard deviation (SD), and precision (relative standard deviation, RSD) of N-nitrosamines migrated from baby bottle teats

N-Nitrosamine	Spiked level (μg/kg)	Recovery ± SD (%)	Precision (RSD %)
			Intra-day	Inter-day
NDMA	20	108.6 ± 2.26	2.08	4.22
	100	101.2 ± 0.79	0.79	3.00
	500	86.31 ± 1.57	1.82	6.88
NDEA	20	101.3 ± 0.43	0.42	2.81
	100	101.7 ± 0.40	0.39	2.50
	500	100.1 ± 0.18	0.18	0.40
NDPA	20	101.0 ± 0.86	0.86	2.49
	100	101.2 ± 0.50	0.50	2.32
	500	101.6 ± 0.18	0.18	4.86
NDBA	20	104.2 ± 0.59	0.59	5.51
	100	102.8 ± 0.50	0.50	1.69
	500	100.7 ± 0.41	0.41	0.84
NPIP	20	104.3 ± 0.55	0.53	2.29
	100	100.2 ± 0.19	0.19	1.81
	500	93.70 ± 0.56	0.50	4.42
NPYR	20	101.8 ± 0.21	0.20	3.72
	100	100.2 ± 0.64	0.64	3.08
	500	93.95 ± 0.57	0.61	3.41
NMOR	20	102.7 ± 0.25	0.24	2.64
	100	100.7 ± 0.86	0.86	1.50
	500	100.5 ± 0.37	0.36	0.56

All data were calculated from measurements carried out in triplicate