Forensic Medicine While dispatching blood and urine for chemical analysis, sodium fluoride is added as preservative in the following concentration – A 30 mg/10 ml B 40 mg/10 ml C 50 mg/ ml D 100 mg/10 ml 💡 Explanation While dispatching blood and urine for chemical analysis, sodium fluoride is added as preservative in the following concentration - ✓ Correct Answer: D. 100 mg/10 ml