A New HPLC-ELSD Method for Simultaneous Determination of N-Acetylglucosamine and N-Acetylgalactosamine in Dairy Foods

Table 2

Comparison of results obtained by standard solution-based and matrix-matched calibration.

Matrix	FC	Recovery (%)
		GlcNAc		GalNAc
		S	M	S	M
Raw milk	25	101	100	98	101
	50	101	97	97	100
	100	102	100	99	102
UHT milk	25	98	100	100	100
	50	99	102	101	101
	100	102	101	99	100
Yogurt	25	103	103	98	97
	50	99	99	99	98
	100	99	101	100	99
Infant formula	25	99	100	100	100
	50	103	102	101	103
	100	102	102	102	102

S = standard solution calibration.
M = matrix-matched calibration.
FC = fortified concentration (mg/mL).