TM 5-6630-215-12(a)Fill a graduated cylinder with the water to be analyzed tothe 25 ml mark.Pour into a sample cell.(b)To the contents of this cell add one ferrous iron testreagent powder pillow DWG No.13222E0715 and swirl to mix.(c)Allow the solution to stand 2 minutes.If iron is present,an orange color will develop.Proceed to step (d) while waiting.(d)Fill the second clean sample with the original samplewater and place it into the cell holder.Insert the Iron (FerroverMethod) Metal Scale into the meter and adjust the wavelength dial to510 nm.Adjust the light control for a meter reading of 0 mg/1.(e)Replace this blank sample with the prepared sample (step(c)) in the cell holder and read the mg/1 ferrous (Fe++) iron on themeter scale.c. Iron, total and Ferric (Fe+++) - 1,10-Phenanthroline Method(fig. 2-11, 2-12 and para 2-18).(1)Iron in Water (para 2-19b).(2)Iron, total.Test procedure.(a)Fill a graduated cylinder with the water to be analyzed tothe 25 ml mark.Pour into a clean sample cell.(b)Add the contents of one Ferrover reagent test powder pil-low (Dwg No.13222E0657) to the sample, swirl and mix.Let the samplestand 2 minutes and more than 10 minutes to allow the color todevelop.(c)Fill a clean sample cell with original sample water (step(a)) and place it in the cell holder.Insert the Iron (Ferrovermethod) meter scale in the meter and adjust the wavelength dial to 510nm.Adjust the light control for a meter reading of 0 mg/1.(d)Replace this blank sample with the prepared sample (step(c)) in the cell holder and read the Total Iron (in mg/1) on the meterscale.(3)Iron, Ferric (Fe+++) - by subtracting the Ferrous (Fe++)Iron Valve from the total Iron Valve, the Ferric(Fe++) Iron Valve inmg/L is obtained.NOTETo extend the range of the test a sample dilutionis necessary (para 2-10a and table 2-1).2-44
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