How to apply for a metal composition analysis report
Date：2025-09-12 10:17:50 Classification
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Compositional analysis is a technique that uses microscopic spectroscopy and laser femtosecond laser detection to analyze the composition of products or samples, providing qualitative and quantitative analysis of each component. The complete process and key considerations for obtaining a metal composition analysis report are summarized in conjunction with laboratory testing standards and industry practices:
I. Clarify the Testing Purpose and Applicable Standards
1. Determine the Use of the Report
- Food Contact Materials (such as tableware and kitchenware): Must comply with GB 4806.9-2016 (China Food-Grade Metal Standard) and test for heavy metal migration (lead, cadmium, chromium, nickel, etc.).
- Products Exported to the EU: Must meet EC No. 1935/2004 and EN 601/602 (heavy metal migration limits).
- Industrial Material Quality Control: Comply with GB/T 15067.2-2016 (stainless steel composition) or ASTM E415 (international standard).
2. Select Testing Items
- Basic Composition Analysis: Content of major elements (e.g., percentages of iron, chromium, and nickel).
- Hazardous Substance Testing: Total amount of heavy metals such as lead, cadmium, arsenic, and mercury.
- Migration Testing (Food Contact): Dissolution of heavy metals in simulated acidic/greasy environments.
II. Selecting a Testing Agency and Submitting Samples
1. Agency Qualification Requirements
- Laboratories with CMA (China Metrology Accreditation) and CNAS (China National Accreditation Service) certifications are preferred.
- Recommended internationally accredited testing agency: Dezewei Testing (covering EU/US standards).
2. Sample Preparation Specifications
- Provide representative samples (from different batches/specifications). For example, for stainless steel lunch boxes, include the main body, coating, and welds.
- Indicate the material type (e.g., 304 stainless steel, aluminum alloy) and usage conditions (whether it will come into contact with acidic foods).
III. Laboratory Testing Process
| Test Type | Core Steps
| Quantitative Composition Analysis | Spectroscopy (ICP-OES), X-ray Fluorescence (XRF)
| Heavy Metal Migration Test | Immersion in Simulated Fluids (4% Acetic Acid, Olive Oil), High-Temperature Migration Test
| Corrosion Resistance Test | Salt Spray Test, Acid-Base Solution Corrosion Assessment
> Note:
> - Food contact materials require additional sensory evaluation (odor, discoloration) and label review (knife and fork marking).
IV. Report Generation and Certification
1. Report Content Requirements
- Include the test method, instrument model, and comparison limit (e.g., lead ≤ 0.1 mg/L).
- Attach the Qualification Certificate Number (CMA/CNAS) and laboratory seal.
2. Special Scenario Handling
- Exports to the EU: The report must indicate compliance with the additional requirements of the LFGB (Germany) or DGCCRF (France).
- For e-commerce platform registration: An anti-counterfeiting report with a QR code is required (e.g., Tmall, JD.com).
V. Cycle and Cost Reference
- Duration: Routine testing: 5-7 business days, migration testing or complex samples can be extended to 10-15 days.
- Cost:
- Basic component analysis: ¥800-2000;
- Full food-grade testing (including migration): ¥1500-3000.
Key Notes
1. Standard Updates: New EU Regulation EU 2023/1672 strengthens nickel migration limits (effective in 2025), requiring advance process adjustments.
2. Sample Contamination Risk: Avoid direct contact with metal surfaces before submitting for testing to prevent grease from affecting the results.
3. Report Validity: Typically 1-2 years, but e-commerce platforms may require annual renewal.
> Pre-testing is recommended to identify high-risk items (e.g., lead content in coatings) to avoid delays in rectification. If laboratory recommendations or refinement of limit lists are required, targeted analysis can be provided.
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