Melamine Testing in Milk, Infant Formula & Food | LC-MS/MS | NABL
Auriga Research provides NABL-accredited and FSSAI-notified melamine testing for milk, powdered and liquid infant formula, dairy products, eggs, pet food, and animal feed. Our reference method is LC-MS/MS with stable isotope-labelled internal standards, capable of confirmatory quantitation well below the FSSAI maximum limits of 0.15 ppm (liquid infant formula), 1 ppm (powdered infant formula), and 2.5 ppm (other foods and feed).
Auriga was among the first laboratories in India to establish LC-MS/MS-based confirmatory melamine analysis and continues to support FSSAI, dairy processors, infant formula manufacturers, feed producers, and importers with routine compliance and recall investigation testing.
Background — The 2008 Melamine Scandal
In 2008, large quantities of milk and infant formula in China were found to be adulterated with melamine powder. The protein content of milk is conventionally measured by the Kjeldahl nitrogen method, which assumes all nitrogen in the sample originates from protein. Melamine (C3H6N6) is 66% nitrogen by weight, so adding melamine powder fraudulently inflated apparent protein readings without using actual milk solids. More than 300,000 infants were sickened, over 50,000 hospitalised, and six died from melamine-related kidney damage. Globally, regulators including FSSAI, Codex, USFDA, and the EU subsequently set strict maximum limits and mandatory testing for at-risk product categories.
FSSAI & Codex Regulatory Limits
| Product Category | Maximum Limit | Reference |
|---|---|---|
| Liquid infant formula | 0.15 mg/kg (ppm) | FSSAI 2016 / Codex CXS 193-1995 |
| Powdered infant formula | 1 mg/kg (ppm) | FSSAI 2016 / Codex CXS 193-1995 |
| Other foods and animal feed | 2.5 mg/kg (ppm) | FSSAI 2008 advisory / Codex CXS 193 |
Methods Used
- LC-MS/MS with stable isotope-labelled (¹³C₃ or ²H₆) internal standards — confirmatory quantitation at sub-ppm sensitivity
- Co-analysis of melamine and cyanuric acid (the toxic combination forming melamine-cyanurate kidney crystals)
- ELISA immunoassay — high-throughput screening; LC-MS/MS confirmation of all positive results
- HPLC-UV — secondary method for higher-concentration matrices
- GC-MS with derivatisation — available for specific matrices on request
- Sample preparation by SPE clean-up and trichloroacetic acid protein precipitation
Sample Matrices Accepted
- Liquid milk — raw, pasteurised, UHT, flavoured
- Powdered milk — skimmed, full-fat, dairy whitener, milk solids
- Infant formula — liquid and powdered, follow-on and weaning foods
- Condensed milk, evaporated milk, sweetened condensed milk
- Ghee, butter, cheese, paneer, yoghurt, ice cream
- Milk-based confectionery and bakery ingredients
- Whey protein and casein-based dietary supplements
- Eggs and egg products
- Pet food — wet, dry, treats
- Animal feed and feed ingredients (soy meal, wheat gluten, fish meal)
- Vegetable proteins and gluten ingredients (imported lots)
Health Effects of Melamine Exposure
Melamine itself has low acute toxicity, but when ingested with cyanuric acid (a common contaminant of industrial-grade melamine), the two combine in renal tubules to form insoluble melamine-cyanurate crystals. These crystals cause kidney stones, urinary tract obstruction, acute kidney injury, and renal failure. Infants and very young children are most vulnerable because of their smaller body mass and developing kidney function. This is why infant formula limits are stricter than those for general foods.
Who Needs Melamine Testing
- Infant formula and follow-on formula manufacturers — mandatory FSSAI testing
- Dairy processors, milk powder manufacturers, and dairy ingredient suppliers
- Importers of dairy products, infant formula, and milk-based ingredients
- Pet food manufacturers — especially after the 2007 US pet food melamine recall
- Animal feed manufacturers using imported soy, wheat gluten, and rice protein concentrate
- Whey protein, casein, and dairy supplement brands
- Recall investigation teams and dairy quality assurance laboratories
- Export inspection councils and third-party auditors
Why Auriga for Melamine Testing
Among the first labs in India for LC-MS/MS melamine analysis
Auriga was among the first laboratories in India to establish LC-MS/MS confirmatory melamine and cyanuric acid analysis with stable isotope-labelled internal standards — well before mandatory FSSAI testing was rolled out.
Arbro Group analytical heritage
Established analytical heritage through the Arbro Group (Arbro Lab since 1990, Auriga Research since 2007), with NABL ISO/IEC 17025 accreditation — the audit trail FSSAI enforcement officers, APEDA, EIC, and international dairy buyers look for in a high-stakes contaminant testing partner.
Expedited 48-72 hour service for recall investigations
Urgent 48-72 hour reporting available for recall investigations, shipment release decisions, and dairy QA hold-and-release scenarios where a delay measures in tens of lakhs of inventory at risk.
Reports accepted by FSSAI, APEDA, and international buyers
NABL-accredited CoAs accepted by FSSAI enforcement, APEDA dispatch certification, EIC, and major international dairy buyers in EU, GCC, ASEAN, and the United States.
Co-analysis of melamine + cyanuric acid
Single LC-MS/MS run reports both melamine and cyanuric acid — the toxicologically relevant combination that forms insoluble melamine-cyanurate crystals in the kidneys.
Full matrix scope under one roof
Liquid and powdered milk, infant formula, dairy products, eggs, pet food, and animal feed (including imported soy and wheat gluten) — single point of contact, no partner-lab dependency.
How It Works
Get a Quote
Share your product type and the parameters you need tested. Your dedicated SPOC will confirm the testing scope, the applicable method, and the exact sample quantity required for your specific panel before you dispatch anything.
Send Your Sample
Dispatch your sample with a completed Test Request Form to the nearest Auriga lab. Each sample is individually bar coded and registered in YLIMS, Auriga's in-house Laboratory Information Management System, upon receipt. Testing begins within 24 hours of sample registration.
Testing and QA Review
Your sample is tested against the confirmed validated method by Auriga's scientific team. Every result passes through a formal internal QA review and sign-off before the report is generated.
Receive Your NABL Report
Your NABL-accredited test report is delivered digitally within the committed turnaround time. Reports carry Auriga's NABL accreditation under ISO/IEC 17025:2017 and are accepted by FSSAI, APEDA, EIC, and major international buyers. You can track your sample status in real time through YLIMS at any point in the process.
Turnaround Time
Standard LC-MS/MS confirmatory melamine and cyanuric acid analysis is reported within 7-10 working days of sample receipt. ELISA screening results are available in 3-5 working days. Expedited 48-72 hour reporting is available for urgent recall investigations and shipment release decisions — flag this requirement at the quote stage so the SPOC can fast-track sample log-in and analyst assignment.