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Total Migration and Non-Volatile Residue Constant Weight Tester: Principles, Applications and Standards
Release time:
2026-06-01
Total Migration and Non-Volatile Residue Constant Weight Tester: Principles, Applications and Standards
1. Introduction
The Total Migration and Non-Volatile Residue Constant Weight Tester is a laboratory instrument designed for precise gravimetric analysis of residues in packaging materials, food contact materials, pharmaceuticals, and chemical products.
It is widely used to determine:
- Total migration of substances
- Non-volatile residue content
- Evaporation residue after solvent extraction
- Mass change under controlled heating conditions
This instrument plays a critical role in quality control and regulatory compliance testing.
2. Test Principle
The instrument is based on the constant weight gravimetric method.
The process includes:
1. Sample preparation with simulants or solvents
2. Controlled evaporation or drying process
3. Repeated weighing until constant mass is achieved
4. Calculation of residue or migration level
High precision temperature control and automated weighing ensure repeatability and accuracy.
3. Applications
This tester is widely used in:
Food packaging industry
- Total migration testing of packaging materials
- Compliance with food safety regulations
Pharmaceutical industry
- Extractables and leachables testing
- Container closure system evaluation
Material manufacturing
- Polymer residue analysis
- Quality control of raw materials
Third-party laboratories
- SGS, TÜV, and national inspection institutions
4. Relevant Standards
Common international standards include:
- GB 31604 series (China food contact materials)
- EU Regulation No. 10/2011
- ISO 1186 (Plastics – Migration testing)
- FDA food contact material guidelines
These standards define test conditions, simulants, and acceptance limits.
5. Advantages of Constant Weight Method
Compared with traditional manual evaporation methods, modern constant weight testers provide:
- Higher accuracy and repeatability
- Automated weighing process
- Reduced human error
- Improved efficiency in laboratory workflow
6. Relationship with Other Testing Methods
This instrument is often used together with:
- Drying loss (LOD) testing
- Ash content determination
- Residue after ignition testing
These combined methods provide a complete understanding of material purity and safety.
7. LabStone Solution
LabStone provides advanced constant weight testing instruments designed for:
- High precision measurement
- Stable temperature control system
- Automated weighing and calculation
- Compliance with international standards
These systems are suitable for food, pharmaceutical, chemical, and packaging laboratories.
8. Conclusion
The Total Migration and Non-Volatile Residue Constant Weight Tester is an essential instrument for ensuring material safety and regulatory compliance in modern industries.
It provides reliable data for evaluating migration behavior and residue content in various materials.
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