(2) Chloride Test - High Range 1,000 -20,000 mg/l.
(a) Fill the plastic measuring tube level full of the water
that is to be tested and pour it into the Volumetric flask (Fig. 1-5,
(b) Add the contents of one Chloride Indicator Powder Pillow.
Swirl to mix.
The dropper pipet is shipped separately from the
solution because the solution slowly attacks the
rubber of the dropper.
The dropper must be con-
ditioned (wetted) by allowing it to soak in the
test solution for approximately two hours before
Otherwise the drop size may be too
small and the resulting answers too large.
(c) Add the Chloride Titrant Solution dropwise, stopper and
shake very vigorously between each addition.
Count the drops until
the color changes to orange.
Hold the dropper in a vertical position.
If the precipitate is orange and the solution is
yellow, greater agitation is required.
must be repeated.
(d) Each drop Chloride Titrant Solution is equal to 606 mg/l
(e) Remove dropper from solution bottle and rinse. Replace
original cap at completion of test.
Keep bottle tightly capped.
Ferric Iron Test Kit Range 0-10.0 mg/l (fig. 2-7).
(1) Iron in water.
Natural waters contain variable but minor
amounts of iron.
Iron in ground waters is normally present in the
ferrous (Fe++) or soluble state which is easily oxidized to ferric
(Fe+++) or insoluble iron on exposure to air. Iron can enter a water
system by leaching natural deposits from ironbearing industrial wastes,
effluents from pickling operations, or acidic mine drainage.
(a) Iron in domestic water supply systems stains laundry and
porcelain, causing more of a nuisance than a potential health hazard.
Taste thresholds of iron in water are 0.1 mg/l ferrous iron and 0.2
mg/l ferric iron, giving a bitter or astringent taste.
Water used in
industrial processes must usually contain less than 02. mg/l total
Domestic water suppliers containing more than 0.3 mg/l total
iron are objectionable due to staining and taste considerations.