Specification of Purified Water

S. No. Test Specifications
Description Clear, colorless and odorless liquid.
2. Acidity orAlkalinity For acidity: The resulting solution should be no red colour.

For alkalinity: The resulting solution should be no blue colour.

3. pH Between 5.0 to 7.0.
4. Ammonium Sample solution should not more intensely coloured than standard solution.
5. Calcium & Magnesium Pure Blue Colour should be produced.
6. Heavy Metals NMT 0.1ppm
7. Chloride The appearance of the solution should not change for at least 15 min.
8. Nitrate NMT 0.2 ppm
9. Sulphate The appearance of the solution should not change for at least 1hr.
10. Oxidisable Substances The solution shouldremains faintly pink.
11. Residue On Evaporation NMT 0.001%
12. Conductivity NMT 4.7 µS/cm
13. Total Microbial Count:-  

 

NMT 100 cfu/ml

Total Aerobic Bacterial Count
Total Fungal Count Should be Nil.
Test for specific pathogens:-  

 

Should be Absent.

Escherichiacoli
Salmonella typhimurium Should be Absent.
Pseudomonas aeruginosa Should be Absent.
Staphylococcus aureus Should be Absent.

 

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Specification