Why “high purity” is not an analytical quality term

The term “high purity” is frequently used for CBD products. It sounds technical and reassuring. From an analytical perspective, however, it is not defined. This article explains why “high purity” does not represent a reliable quality claim and how purity should be interpreted instead.

1. Why “high purity” is not analytically defined

1.1 No fixed thresholds

Analytical terms require defined limits or reference ranges. There are no generally accepted thresholds for “high purity”. Without such limits, the term lacks analytical precision.

1.2 No single measurement parameter

Purity may refer to different aspects: a single compound, a group of compounds or the absence of others. “High purity” does not specify which parameter was measured.

1.3 No method transparency

Analytical comparability depends on known methods. “High purity” provides no information on methods, detection limits or uncertainty.

2. Why purity without context is misleading

2.1 Purity does not describe composition

A high percentage value describes only a proportion, not the entire system. Without composition data, interpretation remains incomplete.

Read more: How to interpret purity, matrix and composition

2.2 Purity is not a quality tier

Quality is multi dimensional. Purity alone does not describe stability, reproducibility or analytical rigor.

2.3 Purity without a COA is not verifiable

Without a COA, purity claims cannot be checked. Even with a COA, context and traceability are essential.

Read more: What a COA can tell you and where its limits are

3. How to interpret purity correctly

3.1 Always read purity as relative

Purity gains meaning only in relation to matrix, composition and purpose. Isolated values create false precision.

3.2 Documentation before terminology

COAs, batch logic and composition matter more than labels. Terms never replace documentation.

3.3 Compare only like with like

Purity values are comparable only when methods and parameters match.