Oxalic acid (Collected urine)

Please observe dietary restrictions. |
Do not consume 48 hours before the test: rhubarb, tomatoes
Do not consume 24 hours before the test: cucumbers, chocolate back tea, asparagus, spinach, preparations containing vitamin C | Collection of 24h-urine in a 3000 mL jar (50) with hydrochloric acid (115). | Send in 10 mL urine using spot urine-tube with hydrochloric acid (53). | Indicate duration and volume of collection.