Rice protein is particularly susceptible to arsenic and cadmium contamination due to rice's unique soil uptake chemistry. ICP-MS testing with optional inorganic arsenic speciation.
Rice plants uniquely accumulate inorganic arsenic from flooded paddy soils. Rice-based protein supplements consistently show higher total arsenic than other plant proteins.
Rice paddy flooding mobilizes soil arsenic into the water column where rice roots absorb it readily.
Inorganic arsenic (iAs) is far more toxic than organic arsenic forms. Speciation testing quantifies just the toxic fraction.
FDA has issued guidance on inorganic arsenic in infant rice cereal. Similar scrutiny is expected for rice protein supplements.
California Prop 65 NSRL for inorganic arsenic is 10 µg/day. Per-serving calculations help brands assess compliance.
Standard panel plus optional arsenic speciation.
Submitting takes less than 5 minutes. Most projects turn around in 5–10 business days from sample receipt.
Fill out our sample intake form — sample type, quantity, and timeline. We confirm turnaround and quote within one business day.
We'll send submission instructions and our San Diego shipping address. Most samples ship ambient or cold depending on stability requirements.
Results are delivered as a signed PDF COA within the agreed turnaround. Rush service (2–3 business days) available for urgent timelines.
Total arsenic includes both organic (arsenobetaine, arsenosugars) and inorganic (arsenate, arsenite) forms. Inorganic arsenic is the toxic fraction. For risk assessment purposes, inorganic arsenic is the critical number.
For most regulatory COA purposes, total arsenic is sufficient. For products with high total arsenic (>0.5 ppm), speciation testing helps demonstrate that most arsenic is the less-toxic organic form.
No specific US federal limit exists for rice protein supplements, but California Prop 65 and NSF 173 provide guidance thresholds used by the industry.
Submit your samples and receive an ISO 17025 accreditation pending Certificate of Analysis. Results in 5–10 business days.