Sr.No. | Test | Acceptance criteria |
1 | Description | Clear, colorless and odorless liquid. |
2 | Total Organic carbon | Not more than 500 ppb |
3 | Conductivity (at 25°C) | Less than 1.3 µS/cm |
4 | Bacterial Endotoxins | Less than 0.25 EU/ml. |
5 | Microbial limit test | |
a. | Total aerobic microbial count | Less than 10 cfu / 100ml. |
b. | Pathogens | |
i. | Escherichia coli | Should be absent |
ii. | Salmonella sp. | Should be absent |
iii. | Pseudomonas aeruginosa | Should be absent |
iv. | Staphylococcus aureus | Should be absent |
6 | Acidity or alkalinity | No red or blue color produced. |
7 | pH | Between 5.0 and 7.0 |
8 | Ammonium | Less than 0.2 ppm |
9 | Calcium and magnesium | A pure blue colour is produced |
10 | Heavy metals | Less than 0.1 ppm. |
11 | Chlorides | The solution shows no change in appearance. |
12 | Nitrates | Less than 0.2 ppm |
13 | Sulphates | The solution shows no change in appearance. |
14 | Oxidisable substances | The solution remains faintly pink |
15 | Residue on evaporation | Less than 0.001 % |