Every Vintessential™ test kit includes a QC standard supplied with a Certificate of Analysis. Each standard is rigorously tested for accuracy, stability and consistency, with a known certified value.
When running a batch, the standard should be within ±10% of the value listed on the bottle or CoA.
For example, the Malic Acid kit includes a standard of approximately 0.2 g/L.
If your result falls outside ±10%:
Most deviations are caused by technique — not the kit itself.
