Table 3.

Stability of folic acid and iodine in T after 6-month storage.

Types of		Retention of folic acid (%)			Retention of iodine (%)
Sol	Prem	25 °C	35 °C	45 °C	25 °C	35 °C	45 °C
I	H&S	–	–	–	93.2 ± 2.9	90.3 ± 3.9	92.3 ± 6.8
C	–	82.3 ± 6.1	80.4 ± 5.9	78.9 ± 3.5	95.3 ± 3.4	92.9 ± 3.6	89.2 ± 6.2
D	–	81.1 ± 1.2	77.3 ± 0.8	72.9 ± 3.3	92.2 ± 1.5	89.8 ± 2.1	86.8 ± 1.4
C	H&S	83.5 ± 0.5	82.2 ± 2.9	83.5 ± 0.5	89.6 ± 3.2	89.7 ± 3.9	87.4 ± 1.8
D	H&S	80.6 ± 1.5	77.8 ± 1.2	73.2 ± 1.5	93.1 ± 1.5	94.0 ± 4.3	93.0 ± 1.4

Sol. = solution: C = 0.5% folic acid + 2% iodine, D = 1% folic acid + 2% iodine, and I = 2% iodine. Prem. = iron premix: H&S = iron premix coated with 5% HPMC and 5% soy stearin.