DD ISO TS 17193 pdf download Milk — Determination of the lactoperoxidase activity — Photometric method (Reference method) 4 Reagents Use only reagents of recognized analytical grade, unless otherwise specified, and doubly distilled water or water of equivalent purity. 4.1 Buffer solution, pH 6,0. Dissolve 0,72 g of disodium hydrogenphosphate dihydrate (Na 2 HPO 4 2H 2 O) and 3,99...