EN 13130-2:2004

Foreword
1 Scope
2 Normative references
3 Principle
4 Reagents
5 Apparatus
6 Samples
7 Procedure
   7.1 Preparation of standards
   7.2 Preparation of calibration graphs
   7.3 Validation of preparation of standard solutions
   7.4 Suitability of orthophthalic acid as an internal
        standard
   7.5 Extraction of olive oil simulant migration test
        samples
   7.6 Preparation of aqueous simulant migration samples
   7.7 Injection of samples
8 Expression of results
   8.1 Methods of calculation
   8.2 Precision
9 Confirmation of terephthalic acid
   9.1 Requirement for confirmation
   9.2 Re-analysis using an ion exchange column
   9.3 Multi-wavelength measurements/diode array spectra
        analysis
10 Test report
Annex A (normative) Reagents for confirmation of terephthalic
        acid
   A.1 Reagents for confirmation of terephthalic acid
Bibliography

This part of this European Standard specifies methods for the determination of the monomer terephthalic acid in food simulants; distilled water, 3 % w/v acetic acid aqueous solution, 15 % v/v ethanol aqueous solution and olive oil and other fatty food simulants, simulants D, e.g. a mixture of synthetic triglycerides or sunflower oil or corn oil. The methods are capable of determining terephthalic acid in the food simulants at the level of the specific migration limit of 7,5 mg of terephthalic acid per kilogram of food simulants. NOTEThis method was developed for the determination of terephthalic acid in 15 % v/v aqueous ethanol, as required by the regulations in force at the time the development work was carried out. However, this method, developed for 15 (v/v) aqueous ethanol, should be applicable to the determination in 10 (v/v) aqueous ethanol.