- Gluten (ELISA)
- Gluten by R5 ELISA to show no grain or seed carryover, against 20 ppm if a gluten-free claim is made.
- Chlorophyll or color
- Chlorophyll content or a color reading as a freshness and identity check.
- 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, E. coli and Salmonella (often Staphylococcus aureus too). Field-grown grasses can carry high plate counts.
- Pesticide residues
- Multi-residue screen by GC-MS/MS and LC-MS/MS, required for organic claims and commonly requested for conventional material.
- Physical tests
- Loss on drying, mesh or particle size, bulk density, color and odor against the spec.