What is the shelf life of Reagecon’s pH Buffer Capsules once made into a solution

Reagecon Buffer Capsules (pH 4.00, 7.00, 9.00 & pH 10.00) once reconstituted should be stored in an air tight container (in an upright position) at room temperature, away from any strong light source (e.g. sunshine, UV lamp). They will have a shelf life of 3 months provided Good Laboratory Practice is strictly adhered to, it is strongly advised to record the date of reconstitution on the bottle, to close it immediately after every use and to discard the contents of the bottle when less than 10% of the original volume of the solution is left. This 3 month expiry date is valid provided the product is properly stored and handled in compliance with these instructions. This expiry date ceases to be valid if the product is damaged, contaminated or modified.

Please note that Reagecon Buffer Capsules pH 9.00 & pH 10.00 (once reconstituted) are less stable than Reagecon Buffer Capsules pH 4.00 & pH 7.00 as these products absorb CO₂ from the atmosphere, therefore it is imperative to follow the above recommendations in order to allocate a 3 month expiry date to these products.