It is written in the product information technical bulletin included in the kit to store it at room temperature so I would like to know if it is stored in low temperature, will the effectivity of the kit be affected?
The kit contains an assay buffer with a ph of 7.5, a calibrator and a reagent.
Here's the link to the product information.
http://www.sigmaaldrich.com/content/dam/sigma-aldrich/docs/Sigma/Bulletin/2/mak119bul.pdf