The certificate that Megazyme currently supplies for Phytic Acid Assay Kit is the certificate of analysis for the kit (available where the product is located on the Megazyme website).
Measurements using K-PHYT rely on accurate determination of phosphorus. The performance of this kit requires that a phosphorus standard curve is performed for each batch of tests and the phosphorus standard that is supplied with the kit is standardised against a certified phosphorus standard obtained from SIGMA (cat no. 79409). If required this certified standard may be used in place of the phosphorus standard that is supplied with K-PHYT. The oat sample supplied with the kit is to be used as a control and should generate phosphorus / phytic acid values within 10% of the value supplied on the sample label.