- Identity
- HPLC anthocyanin profile (mainly cyanidin glycosides) to confirm aronia and detect other berry materials.
- Anthocyanin or polyphenol assay
- Total anthocyanins by pH-differential UV or HPLC, or polyphenols by Folin-Ciocalteu, with the method named.
- Brix and acidity
- Brix, titratable acidity and pH for juice concentrate.
- Heavy metals
- Lead, arsenic, cadmium and mercury by ICP-MS, checked against the buyer's limits and any Prop 65 exposure targets.
- Microbiology
- Total plate count, yeast and mold, coliforms or E. coli, and Salmonella. Raw powders carry more microbial load than extracts and are often steam treated.
- Pesticide residues
- Multi-residue screen by GC-MS/MS and LC-MS/MS, required for organic material and commonly requested for conventional lots.