(a) Chromatogram of a standard mixture of vitamin C (1), vitamin B3 (2),
vitaminB5 (3), vitaminB9 (4) and vitaminB2 (5), each at a concentration of 50mgL−1;
(b) chromatogram of an eucalyptus honey, (1) vitamin C; (2) vitamin B3; (3) vitamin
B5; (4) vitamin B9; (5) vitamin B2.