Why does the turbidity calibration kit have different lot numbers and expiration dates for each of the vials?
Turbidity calibration standard kit lots and expiration dates
Each turbidity standard included in a kit is produced individually and has a lot number and expiration date of its own. These vials are then combined into a kit that is given a lot number and expiration date for the kit as a whole. This allows for maximum traceability of each set sold.