1. Addo, C. and Augustin, J. (1988) Changes in the vitamin B-6 content in potatoes during storage. J. Fd Sci., 53, 749–52.
2. Alcock, S.C., Finglas, P.M. and Morgan, M.R.A. (1990) An enzyme-linked immunosorbent assay for pyridoxamine and its comparison with alternative analytical procedures. Fd Agric. Immunol., 2, 197–204.
3. Alcock, S.C., Finglas, P.M. and Morgan, M.R.A. (1992) Production and purification of an R-protein-enzyme conjugate for use in a microtitration plate protein-binding assay for vitamin B12 in fortified food. Fd Chem., 45, 199–203.
4. Andersson, I., Lundqvist, R. and öste, R. (1990) Analysis of vitamin B2 in milk by a radioisotope dilution assay. Milchwissenschaft, 45, 507–9.
5. AOAC (1990a) Thiamin (vitamin Bi) in foods. Fluorometric method. Final action. In AOAC Official Methods of Analysis, 15th edn (ed. K. Helrich), Association of Official Analytical Chemists, Inc., Arlington, VA, 942.23.