Nizar Katrangi PhD
Eyad Katrangi PhD
Urine Preservatives
The conditions and concentrations of urine preservatives are defined for 24-hour collections as follows:
| Ambient | Room temperature (21–25 degrees C) |
| Refrigerated | 4–8 degrees C |
| Frozen | -20 degrees C |
| Boric Acid (crystals) | 10 g per 24-hour collection |
| 6M Hydrochloric Acid | 30 mL per 24-hour collection |
