2.Sulphur application slightly increased fresh yield,contents of free amino acids,total ascorbicacid(tAsA),ascorbicacid(AsA),dehydroascorbic acid(DAsA),while decreased content of tea polyphenols and ratio of tea polyphenols to free amino acids(TP/AA).
3.In a preservation experiment, TP (tea polyphenols), TP + CA (citric acid), TP + MA (malic acid) and TP + AA (ascorbicacid) were added to rape salad oil before AV (acid value) and POV (peroxidation value) in it were determined.
10.A new method for separating and determining ascorbicacid (AA), dehydroascorbic acid (DHAA) and dehydroisoascorbic acid (DHIAA) simultaneously using electrostatic ion chromatographys (EIC) was presented.