Predicting the Stability of Double Fortified Salt by Determining the Coating Quality of the Encapsulated Iron Premix

Table 1

colour space value of all premixes and uncoated extruded ferrous fumarate. A higher L value indicates whiteness, and a lower L indicates darkness.

Sample	L	a	b
Premix-1	90.71 ± 1.95	−0.58 ± 0.23	2.4 ± 0.64
Premix-2	78.82 ± 1.31	0.60 ± 0.15	−1.55 ± 0.13
Premix-3	80.18 ± 1.20	−1.14 ± 0.10	−1.03 ± 0.08
Premix-4	93.45 ± 1.12	−0.84 ± 0.21	1.56 ± 0.80
Uncoated premix	30.17 ± 0.4	12.63 ± 0.05	18.06 ± 0.16

L (+ =  lighter; − = blacker); a (+ = red; − = green); b (+ =  yellow; − = blue); the L values of Premix-2 and Premix-3 are not significantly different from each other, but are significantly lower that the values for Premix-1 and Premix-4, which not significantly different from each other.