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

Table 2

Calibration curve, LOD, and LOQ of L-EGT.

Sample	Regression equation	Linear range/(ng/mL)	Correlation coefficient	LOD/(μg/kg)	LOQ/(μg/kg)
Cream	Y = 1.68e^5X−5.11e^5	5–200	1.000	50	100
Toner	Y = 2.48e^5X−4.48e^5	5–200	1.000	25	50