Final answer:
Sodium acetate is used as a buffer solution in methods for urobilinogen in urine to stabilize the pH and ensure accurate measurement of urobilinogen levels.
Step-by-step explanation:
Sodium acetate is used in methods for urobilinogen in urine as a buffer solution to maintain a specific pH range. Sodium acetate acts as a weak base and helps stabilize the pH of the urine sample, ensuring accurate measurement of urobilinogen levels. It also prevents any interference or changes in pH that may affect the urobilinogen reaction.