01/09/2026
Most heavy metal failures in food don't start on the factory floor. They start with the supplier.
Lead, arsenic, cadmium, and mercury get into raw materials through contaminated soil, irrigation water, or fertilizer residues absorbed by crops like cocoa, rice, and leafy greens long before processing even begins. By the time a finished product is tested, the contamination is already baked in.
That's the practical problem with testing only at the finished-goods stage: it tells you a batch failed. It doesn't tell you why, or whether the next shipment from the same supplier will fail too.
Malaysia's Food Act 1983 and Food Regulations 1985 set maximum permitted proportions for metal contaminants under the Fourteenth Schedule, varying by food category. Meeting that bar requires a method sensitive enough to measure accurately at low concentrations. ICP-MS fits that role: it can quantify multiple elements per run, separate isotopes, and reach detection limits in the parts-per-billion to parts-per-trillion range.
Sensitivity is only half of it. When a regulator questions a result, the first question is rarely about the number. It's about how the number was generated, and whether the lab can prove it. That's what ISO/IEC 17025 accreditation is built to demonstrate.
We wrote a full breakdown covering the legal limits, the ICP-MS methodology, and why raw material suppliers need independent validation, not just finished-product checks: https://www.kas-lab.com.my/blog/compliance-related-8/malaysian-heavy-metal-limits-in-food-why-icp-ms-testing-holds-up-under-audit-65
Subscribe to our Newsletter: https://marketing.kas-lab.com.my/linkedin-newsletter-subscription