How to Control Aflatoxin in Peanut Export: A Complete Buyer’s Guide

Understanding Aflatoxin in Peanuts

Aflatoxin is a naturally occurring toxic compound produced by molds (Aspergillus flavus and Aspergillus parasiticus) that can grow on peanuts during cultivation, harvesting, drying, and storage. For peanut importers and food manufacturers, controlling aflatoxin levels is not just a quality concern — it is a regulatory requirement that can make or break market access.

As a peanut exporter with 20 years of experience, Jinkai Foods has developed a comprehensive aflatoxin control system that ensures every batch meets the strictest international standards, including EU limits of ≤5 ppb total aflatoxin.

Global Aflatoxin Regulations for Peanuts

Different markets have different aflatoxin limits for peanuts and peanut products. Understanding these requirements is essential for successful import:

Market	Total Aflatoxin Limit	B1 Limit	Testing Requirement
European Union	≤ 5 ppb	≤ 2 ppb	Mandatory batch testing
United States (FDA)	≤ 20 ppb	—	Random sampling
China (GB Standard)	≤ 20 ppb	≤ 5 ppb	Factory testing
Middle East	≤ 15 ppb	—	Certificate required
Southeast Asia	≤ 15-20 ppb	—	Varies by country

The EU standard (≤5 ppb total, ≤2 ppb B1) is the most stringent in the world and serves as the benchmark for premium peanut exports. Buyers sourcing for European markets should require suppliers to test every batch before shipment.

Where Aflatoxin Contamination Occurs

Aflatoxin contamination can occur at multiple stages of the peanut supply chain. Understanding these risk points is the first step in effective control:

1. Field Contamination (Pre-harvest)

Drought stress and high temperatures during the growing season create ideal conditions for Aspergillus mold growth. Peanuts grown in regions with inconsistent rainfall are at higher risk. This is why sourcing from established peanut-growing regions with controlled irrigation is critical.

2. Harvest & Drying

Improper drying after harvest is one of the most common causes of high aflatoxin. Peanuts must be dried to ≤10% moisture within 24-48 hours of digging. Delays in drying allow mold to proliferate.

3. Storage & Transportation

High humidity and temperature during storage and shipping can cause mold growth even in initially clean peanuts. Proper warehouse conditions (≤65% RH, ≤20°C) and moisture-controlled packaging are essential.

Jinkai Foods’ 5-Layer Aflatoxin Control System

We have implemented a multi-layered quality control system that addresses aflatoxin at every stage of production:

Layer 1: Raw Material Sourcing

• We source peanuts exclusively from contracted farms in Shandong province — China’s premier peanut-growing region with ideal climate and soil conditions.
• All raw materials are tested for aflatoxin upon arrival at our factory. Lots exceeding 10 ppb are rejected immediately.
• We maintain long-term relationships with farmers who follow good agricultural practices (GAP).

Layer 2: Processing & Sorting

• Color sorting machines — Advanced optical sorters remove discolored and damaged kernels that are more likely to contain aflatoxin.
• Destoning & grading — Removes foreign matter and separates kernels by size, ensuring uniform quality.
• Blanching process — Removing the red skin (testa) eliminates a significant portion of surface mold and aflatoxin.
• Metal detection & X-ray — Ensures no physical contaminants reach the final product.

Layer 3: In-House Laboratory Testing

• Our QC laboratory tests every production batch for aflatoxin using HPLC (High-Performance Liquid Chromatography).
• Testing follows the AOAC 994.08 official method for aflatoxin determination.
• Only batches passing internal QC proceed to packaging and shipment.

Layer 4: Third-Party Verification

• For EU and premium market orders, we provide SGS or Intertek third-party test reports.
• Certificates of Analysis (COA) are available for every shipment upon request.
• Our facilities are audited annually for BRCGS, HACCP, and ISO 22000 compliance.

Layer 5: Packaging & Shipping

• Vacuum packaging options for moisture-sensitive shipments.
• Food-grade woven bags and cartons with proper ventilation.
• Container loading in temperature-controlled conditions.
• Full traceability from farm to port — every bag can be traced to its production batch.

What Buyers Should Ask Suppliers

When evaluating peanut suppliers, ask these critical questions about aflatoxin control:

• “What is your typical aflatoxin level for blanched peanuts?” (Look for suppliers who consistently achieve ≤3 ppb, well below the 5 ppb EU limit.)
• “Do you test every batch, or only spot-check?” (Every-batch testing is essential for consistent quality.)
• “Can you provide third-party test reports (SGS/Intertek)?”
• “What is your rejection rate for raw materials?” (A high rejection rate indicates strict incoming QC.)
• “What certifications does your factory hold?” (BRCGS, HACCP, ISO 22000 indicate systematic quality management.)
• “What is your moisture content at shipment?” (≤5% for blanched peanuts prevents in-transit mold growth.)

Aflatoxin Testing Methods Explained

There are several methods used for aflatoxin testing in peanuts:

• HPLC (High-Performance Liquid Chromatography) — The gold standard for accuracy. Used for final batch certification and third-party testing.
• ELISA (Enzyme-Linked Immunosorbent Assay) — Rapid screening method used for incoming raw material testing. Provides results in 30-60 minutes.
• LC-MS/MS — Most sensitive method, capable of detecting aflatoxin at sub-ppb levels. Used for research and dispute resolution.

At Jinkai Foods, we use ELISA for rapid incoming material screening and HPLC for final batch certification. This dual approach ensures both speed and accuracy in our quality control process.

Storage Recommendations for Buyers

Even with properly tested peanuts, improper storage after delivery can lead to aflatoxin development. Follow these guidelines:

• Store in a cool, dry warehouse at ≤20°C and ≤65% relative humidity.
• Keep bags palleted off the floor to prevent moisture absorption.
• Use stock on a first-in, first-out (FIFO) basis.
• Maintain shelf life within 12-18 months from production date.
• Inspect shipments upon arrival for any signs of moisture damage or mold.

Our Aflatoxin Guarantee

At Jinkai Foods, we stand behind the quality of every shipment. If a customer receives a batch with aflatoxin levels exceeding the contracted specification, we take full responsibility and provide replacement or compensation. This commitment has earned us the trust of buyers in 20+ countries over 20 years of export experience.

Contact us to request free samples and current aflatoxin test reports. You can also learn more about our quality assurance policies and full product range.

Related Reading: Understanding Peanut Kernel Sizes | How to Import Peanuts from China