Table 1.

LOD, LOQ, and specific ions of N-nitrosamines detected by LC–MS/MS

N-nitrosamine	LOD (μg/kg)	LOQ (μg/kg)	Precursor ion (m/z)	Fragment ion (m/z)
NDMA	2.55	7.71	75.0	43.2
NDEA	3.87	11.73	103.0	43.3/75.3
NDPA	1.11	3.38	131.0	43.2/89.2
NDBA	2.15	6.51	159.1	57.2/103.2
NPIP	0.66	2.01	115.0	41.2/69.0
NPYR	0.46	1.38	101.1	55.2
NMOR	2.25	6.82	117.1	86.2
NDPA-d14			145.0	50.8/97.0