Purified Water Specification as per IP/BP/USP

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32080
Purified water specification and limits of test according to USP, BP, EP and IP given below in table:
   Sr. No.
             Parameters
                                    Limits
1.
Description
Clear, Colorless, odorless and tasteless liquid.
2.
pH
Between 5.0 to 7.0
3.
Conductivity
Not more than 1 µS/cm
4.
Acidity / Alkalinity
On addition of Methyl red solution the resulting solution should be not red.
On addition of Bromo thymol blue solution the resulting should not blue.
5.
Ammonium
Test solution should not be colored in intense with compared to standard solution.
6.
Calcium & Magnesium
A pure blue colored should be produced.
7.
Heavy Metals
Not more than 0.1 ppm
8.
Chloride
The appearance of the solution should not be changed for at least 15 minutes.
9.
Nitrate
Not more than 0.2 ppm
10.
Sulphate
The appearance of the solution should not be changed for at least 1 hour.
11.
Oxidisable Substances
The test solution should remain faintly pink.
12.
Residue on evaporation
Not more than 0.001%
13.
Microbiological Limits
Total bacterial Count
Not more than 100 cfu/ml
Total Fungal Count
Not more than 10 cfu/ml
Escherichia Coli
To be absent
Salmonella aureus
To be absent
Pseudomonas
To be absent
Staphylococcus aurogenosa
To be absent

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