SN/T 3182-2012 in English
VALIDFood contact materials-Polymers-Test methods for overall migration into olive oil-Modified method for use in case where incomplete extraction of olive oil occurs
- Issued on:2012-05-07
- Implemented on:2012-11-16
- File Format:PDF
- Delivery:Via email within 1~3 business days
$136.00
| Standard No: | SN/T 3182-2012 |
| Document status: | VALID |
| Title in English: | Food contact materials-Polymers-Test methods for overall migration into olive oil-Modified method for use in case where incomplete extraction of olive oil occurs |
| Title in Chinese: | 食品接触材料 高分子材料 橄榄油模拟物中总迁移量的试验方法 橄榄油不完全抽提时的改进方法 |
| Language: | English |
| File Format: | Electronic (PDF) |
| Delivery: | Via email within 1~3 business days |
| Issued on: | 2012-05-07 |
| Implemented on: | 2012-11-16 |
| Professional Classification: | SN-Import&Export Inspection |
| Related Keywords: | centrifuge speed ≥5000r/min solvent extraction use
olive oil olive oil-modified method olive oil simulant incomplete extraction |
| Related Topics: | total migration
Olive Oil Migration Olive Oil Total Migration Total Migration: sn/t+3367-2012 total migration sn/t3367-2012 migration olive oil Olive Oil Total Migration total migration olive oil olive oil migration Olive Oil Total Migration What method is used for polymer materials food oil material |
Introduction
Standard Background and Scope of Application
This standard is equivalent to the international standard EN 1186-10:2002, and proposes an improvement plan for the incomplete extraction problem that occurs when testing the total migration of polymer materials in olive oil simulant. It is applicable to full immersion test scenarios within the temperature range of 5℃-175℃.
Key technical principles
| Core steps | Technical points | Innovation and improvement |
|---|---|---|
| Mass difference subtraction | Calculate the migration amount by the mass difference before and after the sample is immersed | Increase the mandatory requirement of centrifuge speed ≥5000r/min |
| Solvent extraction | Use solvent systems such as dichloromethane/tetrahydrofuran | Optimize solvent selection for different plastic types |
| Methylation reaction | Conversion of fatty acids catalyzed by BF3-methanol complex | The reaction time is clearly controlled to be 10±1min |
Key instrument requirements
The experiment requires the following equipment: centrifuge (≥5000r/min), reflux device, gas chromatograph and other equipment. Glassware such as centrifuge tubes and flasks must meet the accuracy requirements of GB/T 12804-2008.
Operation process optimization
- Pretreatment stage: Prepare the sample according to SN/T 2334-2009, and use an antistatic gun to eliminate interference
- Extraction stage: Use gradient solvent treatment (dichloromethane→KOH solution→methanol)
- Derivatization stage: Strictly control the amount of BF3-methanol added to 5±0.2mL
- Result calculation: Correction calculation according to the formula M=[(m₁-(m₂-m₀))-mₐ]×1000/S
Key points of quality control
- Parallel test ≥3 times, 1 outlier is allowed to be eliminated
- When the migration amount is ＞100mg, the amount of internal standard needs to be increased
- Temperature control deviation does not exceed ±1℃
- Result report is accurate to 1mg/dm²
Implementation suggestions
Laboratories should note: For PVC materials, tetrahydrofuran solvent is preferred, and PE materials are recommended to use xylene; when there are interferences in the sample, refer to Appendix A for method suitability verification.
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