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How do you test for heavy metals and pesticide residues?

Every batch of Sichuan pepper oil is screened for heavy metals and pesticide residues against Chinese national limits (GB 2762 and GB 2763).

Safety Testing

ParameterLimit referenceMethod
Lead (Pb)GB 2762ICP-MS / AAS
Arsenic (As)GB 2762ICP-MS / AAS
Cadmium (Cd)GB 2762ICP-MS / AAS
Mercury (Hg)GB 2762ICP-MS / AAS
Pesticide residuesGB 2763GC-MS/MS multi-residue screen
Peroxide value≤ 0.25 g/100 g (T/TSSP 039-2023)GB 5009.227-2023
MicrobiologicalFood-grade limitsGB 4789 series
  • Source pericarps are screened pre-extraction; finished oil is re-tested post-release
  • Extended European Pharmacopoeia limits (incl. multi-element scan) can be added on request
  • Results are printed on the COA; full analytical reports are available under NDA

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Guilin Four Seasons Sunshine

Founded in 2006, Guilin Four Seasons Sunshine F&F Co., Ltd. is a natural plant extract manufacturer and OEM/ODM partner in Guilin, China, combining proprietary Living-Fragrance physical extraction with supercritical fluid extraction to deliver pure, traceable botanical ingredients to global food, flavor, fragrance and personal care brands.