3.3. Comparison with the IFU 7a
3.3.1. Laboratory scale
In this experiment, 15 commercially purchased juices with sul-fites were analyzed with both methods, HPLC–IMER and IFU 7a, respectively.TheresultsofthiscomparisonaredisplayedinTable1. Thejuicescontained0–20mg/Lsulfite,calculatedasSO2.Inthelast column of the table, the % value of the difference in the results is displayed.