Determination of L-Ergothioneine in Cosmetics Based on Ultraperformance Liquid Chromatography-Tandem Mass Spectrometry

Table 3

Recovery and RSD of L-EGT (n = 6).

Target	Concentrations/(μg·kg^−1)	Cream		Toner
		Recovery/(%)	RSD/(%)	Recovery/(%)	RSD/(%)
L-EGT	200	88.2	1.60	93.9	2.08
	600	88.2	1.74	91.4	0.84
	1000	90.0	0.88	92.9	1.31