Both in spinach and green beans, the main compound was
5-CH3-H4folate which represented about 70% of folates at the
beginning of diffusion and also revealed the highest loss of all
derivatives during diffusion. At pH 7, 5-CH3-H4folate residual ratios
(C1/C0) in spinach decreased with increasing temperature. The
same trend was observed with higher residual ratio (C1/C0) at
pH 5. For green beans, 5-CH3-H4folate residual ratio (C1/C0) decreased
with temperature increase at pH 7 and pH 5.