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
|