Notes on Non-metallic Component Analysis Reports
Date：2026-07-10 13:54:20 Classification
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Non-metallic Component Analysis Report Precautions
I. Sample Preparation Stage (3 Key Points)
1. Representative Sampling: Samples should be representative of the batch. Avoid taking scraps or abnormal parts. It is recommended to take 2-3 parallel samples from the same batch.
2. Sufficient Sample Quantity: Routine testing requires 5-10g, while complex projects (such as isomer analysis) may require more than 20g.
3. Avoid Contamination: Use clean aluminum foil bags or glass containers for sealing. Do not use plastic containers containing plasticizers to prevent the migration and interference of organic substances such as phthalates.
II. Selection of Detection Method (Core Points)
Clear Detection Standard: Select the corresponding method according to the application, such as GB/T, ISO, ASTM, or enterprise standards.
Instrument Matching: FTIR spectroscopy is suitable for qualitative identification of substrate type, while DSC/TGA is suitable for component ratio analysis.
Combining Quantitative and Qualitative Results: When the results of a single instrument are insufficient, it is recommended to use FTIR + DSC + TGA in combination to ensure data cross-validation.
Detection Limit Confirmation: For trace hazardous substances (ppm) (Level), confirmation that the instrument's detection limit meets the standard requirements is required.
III. Report Content Standardization (Key Points)
Complete Information: The report must include the client's information, sample description, testing basis, instrument and equipment, test results, limit standards, and three levels of signatures: issuer/reviewer/approver.
Clear Result Expression: Components should be labeled as percentages (%) or mg/kg, with the testing method and uncertainty included.
Spectrum Attachments: Infrared, DSC, and other spectra should be included as appendices to the report to ensure traceability of results.
Qualification Marks: The report must bear the CMA and CNAS seals (and, if necessary, the ILAC-MRA international mutual recognition mark).
IV. Institution and Process Considerations
Select a qualified third-party laboratory and confirm that its testing scope covers the tested items (Dezewei Testing CNAS Registration No.: L8083).
Communicate the testing cycle in advance: Regularly 5-7 working days, expedited 2-3 days but the cost will increase by 30%-50%.
Confidentiality Agreement Signing: A confidentiality agreement is mandatory when formulas or trade secrets are involved. NDA
Report Version Control: Both electronic and paper versions are retained. Any changes to the report require a new report marked as invalid.
V. Report Usage and Timeliness Management
Validity Management: Non-metallic component analysis reports are generally valid for 1-2 years. Retesting is mandatory after changes to raw material formulations or processes.
Client Approval: For export reports, the list of approved institutions must be confirmed with overseas clients in advance (e.g., some EU clients only accept reports from ILAC-recognized laboratories).
Archiving for Future Reference: Original reports should be kept for 5-10 years for subsequent quality traceability or client audits.
Key Reminder: The greatest risk in non-metallic component analysis (especially for plastics, rubber, and coatings) is the omission of organic additives (plasticizers, flame retardants, antioxidants). It is recommended to proactively list all substances of concern when commissioning testing to avoid invalid reports due to incomplete testing scope.
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