India's Groundnut Export and the Aflatoxin Challenge
Indian groundnuts are a USD 1 billion-plus export category with a persistent compliance problem: aflatoxin contamination is the single biggest trade barrier, particularly for EU-bound shipments. The EU's RASFF system flagged 23 Indian groundnut shipments in 2024 for aflatoxin B1 levels exceeding 2 ppb — the EU limit. Each rejection costs the exporter USD 3,000–12,000 in border inspection, re-export or destruction, and damaged buyer relationships. The science behind the problem is well understood; the solution lies in rigorous supply chain management from harvest to container.
Understanding Aflatoxin in Groundnuts
Aflatoxin is produced by Aspergillus flavus and A. parasiticus moulds, primarily during post-harvest storage under warm, humid conditions. In Indian groundnuts, the critical contamination window is the 2–4 weeks between harvest and drying. If groundnuts are piled in the field or stored in jute bags without adequate ventilation and moisture control, aflatoxin levels can multiply from acceptable to non-compliant within days. EU Commission Regulation 401/2006 specifies the sampling protocol (a minimum of 10 incremental samples per 500 MT lot, composited to a 50kg aggregate sample) — most shipment rejections happen when this protocol is not followed.
EU customs laboratories use HPLC (High Performance Liquid Chromatography) for aflatoxin analysis — not lateral flow rapid test kits. Kits are useful for rapid field screening but cannot be used for compliance certification. Always request an HPLC-based aflatoxin analysis from a NABL-accredited lab before shipment. The NABL lab must have 'aflatoxin B1, B2, G1, G2' in its scope of accreditation — verify this at nabl.gov.in.
Why HPS Grade Consistently Meets EU Limits
HPS (Hand-Picked Selected) groundnuts command a price premium because the selection process inherently removes aflatoxin risk. HPS selection involves manual inspection under UV light — aflatoxin-contaminated kernels fluoresce blue-green under 365nm UV, allowing contaminated nuts to be physically removed. Combined with cold-chain storage from harvest to container stuffing (temperature ≤20°C, RH ≤65%), HPS groundnuts from Rajasthan and Gujarat consistently achieve aflatoxin B1 well below 1 ppb — providing a safety buffer even accounting for sampling variability.