Lactose residues in "lactose-free" milk

Lactose intolerance means that lactose cannot be digested. Lactose is contained in milk and milk products. "Lactose-free milk" is analyzed following Inline Dialysis. No lactose was detected in the milk sample investigated. The chromatogram of the spiked sample corresponds to the limit value of 100 mg/L that applies for lactose-free milk. The separation is performed on the Metrosep Carb 2 - 150/4.0 column.