Question

how frequently should the concentration of a sanitizing solution be checked?
at least daily
at least every 12 hours
at least every 6 hours
at least every 2 hours

Explanation:

Sanitizing solutions can evaporate or get diluted, losing effectiveness. Checking concentration frequently ensures safety and efficacy. Every 2 - hour checks are standard in many hygiene protocols (like food service) to account for usage and environmental factors.

Answer:

At least every 2 hours