Lovibond MD 610, Инструкция по эксплуатации

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229
MD 610_1c 09/2015
Total Phosphate LR
with Liquid reagent
0.1 – 10 mg/l PO
4
This test will measure all phosphorous containing com-
pounds present in the sample, including ortho-Phosphate,
Polyphosphate and organic phosphorous compounds.
1. Fill a clean 100-ml-Erlenmeyer flask with
50 ml homo-
genized sample.
2. Add one spoon
KP962 (Ammonium Persulfate Pow-
der)
to the prepared water sample
3. Add
15 drops of KS278 (50% Sulphuric Acid)
to the
same water sample.
4. Boil for 20 minutes , maintaining the sample volume
above 25 ml with deionised water.
5. Swirl gently several times to mix the contents and allow
the Erlenmeyer flask to cool to room temperature.
6. Fill the Erlenmeyer flask with drops of the same size by
holding the bottle vertically and squeeze slowly:
2 drops KS135 (Phenolphthalein Indicator)
7. Add drops of KS144 (Calcium Hardness Buffer) , one
drop at a time with mixing , until a pale pink colour
just appears.
8. Fill the sample up to 50ml with deionised water.
9. Proceed as in point 3 of the method before (page 226).
The result is shown in the display in mg/l total-Phos-
phate.
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