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Commission Directive of 29 April 1981 laying down the Community method of analysis for the official control of vinyl chloride released by materials and articles into foodstuffs (81/432/EEC) (repealed)

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  1. Introductory Text

  2. Article 1.The analysis necessary for official control of vinyl chloride released...

  3. Article 2.The Member States shall bring into force the laws, regulations...

  4. Article 3.This Directive is addressed to the Member States.

  5. Signature

    1. ANNEX

      DETERMINATION OF VINYL CHLORIDE RELEASED BY MATERIALS AND ARTICLES INTO FOODSTUFFS

      1. 1. SCOPE AND FIELD OF APPLICATION

      2. 2. PRINCIPLE

      3. 3. REAGENTS

        1. 3.1. Vinyl chloride (VC), of purity greater than 99.5% (v/v).

        2. 3.2. N, N-dimethylacetamide (DMA), free from any impurity with the same...

        3. 3.3. Diethyl ether or cis-2-butene, in DMA (3.2) as the internal...

        4. 3.4. Distilled water or demineralized water of equivalent purity.

      4. 4. APPARATUS

        1. NB:

        2. 4.1. Gas-chromatograph fitted with automatic headspace sampler or with facilities for...

        3. 4.2. Flame ionization detector or other detectors mentioned in point 7....

        4. 4.3. Gas-chromatographic column

        5. 4.4. Sample phials or flasks fitted with silicon or butyl rubber...

        6. 4.5. Micro-syringes.

        7. 4.6. Gas-tight syringes for manual headspace sampling.

        8. 4.7. Analytical balance accurate to 0.1 mg.

      5. 5. PROCEDURE

        1. NB:

        2. 5.1. Preparation of standard VC solution (solution A)

          1. 5.1.1. Concentrated standard VC solution at approximately 2 000 mg/kg

          2. 5.1.2. Preparation of dilute standard VC solution

          3. 5.1.3. Preparation of the response curve with solution A

            1. NB:

        3. 5.2. Validation of preparation of standard solutions obtained in point 5.1...

          1. 5.2.1. Preparation of a second standard VC solution (solution B)

          2. 5.2.2. Validation of solution A

        4. 5.3. Preparation of the ‘addition’ curve

          1. NB:

          2. 5.3.1. Preparation of sample

          3. 5.3.2. Procedure

        5. 5.4. Gas-chromatographic determinations

          1. 5.4.1. Agitate the phials avoiding contact between the contained liquid and...

          2. 5.4.2. Put all the sealed phials (5.2 and 5.3) in a...

          3. 5.4.3. Take a sample from the headspace in the phial. When...

          4. 5.4.4. Construct a graph in which the ordinate value shows the...

          5. 5.4.5. Remove from the column (4.3) excess DMA using an appropriate...

      6. 6. RESULTS

      7. 7. CONFIRMATION OF THE VC

      8. 8. REPEATABILITY

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