WHEAT FLOUR FORTIFICATION WITH IRON - Idpas.org
WHEAT FLOUR FORTIFICATION WITH IRON - Idpas.org
WHEAT FLOUR FORTIFICATION WITH IRON - Idpas.org
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__________________________________________________<br />
Aliquot of 10 µg/ml<br />
Final Fe concentration<br />
solution taken (ml)<br />
(ppm)<br />
__________________________________________________<br />
0 0<br />
2 0.2<br />
5 0.5<br />
10 1.0<br />
15 1.5<br />
20 2.0<br />
25 2.5<br />
30 3.0<br />
35 3.5<br />
40 4.0<br />
45 4.5<br />
__________________________________________________<br />
Mix thoroughly by inverting flask 10-20 times. Using 10 ml of each of these standard solutions,<br />
continue under procedure beginning with step 8.<br />
6. Ashing aid<br />
a. Magnesium nitrate solution. Dissolve 50 g Mg(NO 3<br />
) 2<br />
.6H 2<br />
O in water and dilute to 100 ml<br />
or<br />
b. Redistilled HNO 3<br />
IV. Procedure<br />
1. Accurately weigh 2-10 g of sample (depending on concentration of iron expected) into clean<br />
crucible. (Begin to prepare blank solution at this point in same manner as sample.)<br />
2. Char on hot plate or under infrared lamp (optional).<br />
3. Ash overnight in muffle furnace at
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