Simultaneous Determination of Lactulose and Lactose in Conserved Milk by HPLC-RID

Table 1

Concentrations of lactose and lactulose found in five different commercial brands of UHT milk.

Brand codification	Concentration in UHT milk (g/100 mL)
	Lactose	Lactulose
UHT1	5.66 ± 0.01	0.04 ± 0.00
UHT2	5.50 ± 0.51	0.02 ± 0.00
UHT3	6.64 ± 0.35	0.05 ± 0.00
UHT4	5.57 ± 0.21	0.02 ± 0.00
UHT5	5.47 ± 0.11	0.06 ± 0.00

UHT: ultrahigh temperature milk brand.
Values with the same letter in the column indicate that there is no statistically significant difference between the samples to the level of 5%.
Values represent the mean ± SEM.