Camlab Lovibond MD 610, Instruction Manual

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158
MD 610_2d 11/2019
Iron, total LR
with Liquid reagent
0.03 – 2 mg/l Fe
2+/3+
Digestion procedure for the determination of total iron.
Total iron consists of soluble, complexed and suspended
iron. Do not filter the sample but ensure the sample is
homogeneous by vigorously shaking immediately prior to
sampling. For Total Soluble (including all complexed) filtra-
tion will be necessary.
This procedure requires equipment and reagents not in-
cluded in the standard test pack supplied.
1. Filla clean100-ml-Erlenmeyerflask with 50 ml homog-
enized sample.
2. Add 5 ml 1:1 Hydrochloricacid and one spoon KP962
(Ammonium Persulphate Powder) .
3. Boil for 20 minutes , maintaining the sample volume
above 25 ml with deionised water.
4. Cool the sample to room temperature.
5. Fill the vial with drops of the same size by holding the
bottle vertically and squeezeslowly:
1 drop KS135 (Phenolphthalein Substitute Indica-
tor)
6. Add drops of KS144 (Calcium Hardness Buffer) , one
drop at a time with mixing , until a pink/red colour just
appears.
7. Fill the sample up to 50ml with deionised water.
8. Fill a clean vial (24 mm Ø) with 10 ml of the water
sample , closetightly with the cap.
9. Placethe vial in the sample chamber making sure that
the marks
are aligned.
2
5
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