Results were expressed as mg FeSO4·7H2O per L of vinegar. Antioxidants 2018, 7, 139 4 of 17 2.6. Determination of Individual Phenolic Compounds by GC-MS Simple phenolic compounds were isolated from vinegar samples by solid phase extraction (SPE) on C8 Isolute columns, essentially as described...
ChemicalFormula Zn,Cu,FeSO4·7H2O Species Sulfates CrystalSystem Monoclinic MohsScale 2 Color Pale greenish-blue, yellow-green, apple-green; very pale blue-green in transmitted light Streak White Luster Vitreous RefractiveIndex n = 1.477 - 1.479 n = 1.483 - 1.487 n = 1.488 - 1.489 ...