Table 1.

The transition ions, response factor, limits of quantitation, recovery rate, precision and concentration of ethyl vanillin in different strawberry samples.

Sample	Harvest date	concentration (μg/kg)	Transition1a	Transition2 b	RF c	Recover rate (100 %)	precision RSD, %		LOQ (μg/kg)
							intra-day	inter-day
Medallion®-1	01/21/2022	0.1372 ± 0.0014	166–137d	171–138e	1.05	95.6	4.52	4.76	0.009
Medallion®-2	02/12/2022	0.1059 ± 0.0077
Medallion®-3	02/22/2022	0.0733 ± 0.0011
Medallion®-4	12/08/2022	0.070 ± 0.0006
Medallion®-5	12/22/2022	0.0727 ± 0.0007
Medallion®-6	03/01/2023	0.0978 ± 0.0005

^aTransition ions of ethyl vanillin for quantitation.

^bTransition ions of [⁵H₂]-ethyl vanillin for quantitation.

^cResponse factor.

^dThe collision energy for transition ions 166–137 was 12.

^eThe collision energy for transition ions 166–137 was 12.