eLibrary >
BS ISO 17280:2015 Surface active agents. Determination of 1,4-dioxan residues in surfactants obtained from epoxyethane by gas chromatography >
BS ISO 17280:2015 Surface active agents. Determination of 1,4-dioxan residues in surfactants obtained from epoxyethane by gas chromatography, 2015
- Foreword
- 1 Scope
- 2 Normative references
- 3 Principle
- 4 Reagents
- 4.1 1,4-Dioxane, purity 99,5 % minimum.
- 4.2 4-Methyl-1,3-dioxane, purity 98 % minimum.
- 4.3 N, N-dimethylformamide (DMF).
- 4.4 Carrier gas: nitrogen or helium, purity 99,99 % minimum.
- 5 Apparatus
- 5.1 Analytical balance, 0,1 mg readability.
- 5.2 Gas chromatography system, attached with temperature programmed device and flame ionization detector (FID).
- 5.3 Head space sampling unit
- 5.4 20 ml crimped top glass vials, sealing pliers and sealing clamp suitable for head space unit.
- 5.5 Septum and crimped tops, lined with aluminium or PTFE, for closing the vials.
- 5.6 Sealing pliers, for the vials.
- 5.7 Capillary column, capable of the separation characteristics shown in Figure 2.
- 5.8 Volumetric flasks, 50 ml and 100 ml capacity.
- 5.9 Gas tight syringes or glass pipettes, 1 ml ± 0,01 ml capacity.
- 6 Preparation of calibration solutions
- 6.1 Calibration solution A
- 6.2 Calibration solution B
- 7 Procedure
- 7.1 Preparation of the test sample
- 7.2 Standard addition procedure
- 7.2.1 Preparation of test sample solutions
- 7.2.2 Determination
- 7.2.3 Expression of results
- 7.3 Relative response factor procedure
- 7.3.1 Determination of relative response factor
- 7.3.2 Preparation of test sample solutions
- 7.3.3 Determination
- 7.3.4 Expression of results
- 8 Chromatographic conditions
- 9 Evaluation
- 9.1 General
- 9.2 Identification
- 9.3 Calculation
- 10 Precision
- 10.1 Repeatability limit
- 10.2 Reproducibility limit
- 11 Test report
- Annex A (informative) Statistical data from the ring carried out [Go to Page]