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BS EN 16857:2017 Foodstuffs. Determination of benzene in soft drinks, other beverages and vegetable-based infant foods by headspace gas chromatography mass spectrometry (HS-GC-MS), 2017
- National foreword
- 1 Scope
- 2 Normative references
- 3 Principle
- 4 Reagents [Go to Page]
- 4.1 Benzene, C6H6, purity is ≥ 99,0 % (CAS 71-43-2).
- 4.2 Benzene-d6, purity is ≥ 99, 6 atom % D (CAS 1076-43-3).
- 4.3 Helium purified compressed gas, purity equivalent to 99,995 % or better.
- 4.4 Methanol, suitable for headspace GC analysis (CAS 67-56-1).
- 4.5 Preparation of stock and standard solutions [Go to Page]
- 4.5.1 General
- 4.5.2 Benzene stock solution, mass concentration ρ approximately 2,20 mg/ml
- 4.5.3 Benzene intermediate standard solution, ρ approximately 54 µg/ml
- 4.5.4 Benzene standard solution, ρ approximately 0,5 µg/ml
- 4.5.5 Benzene-d6 internal standard (IS) stock solution, ρ approximately 2,36 mg/ml
- 4.5.6 Benzene-d6 internal standard (IS) solution, ρ approximately 4,2 µg/ml
- 4.6 Preparation of the calibration solutions
- 5 Apparatus
- 6 Procedure [Go to Page]
- 6.1 General
- 6.2 Sample treatment
- 6.3 Test sample preparation
- 7 HS-GC-MS analysis [Go to Page]
- 7.1 General
- 7.2 Headspace sampling conditions
- 7.3 Injection conditions for split/splitless injector
- 7.4 Oven conditions
- 7.5 Column conditions
- 7.6 Transfer line conditions
- 7.7 Mass spectrometer conditions
- 7.8 Mass spectrometer acquisition parameters and peak identification
- 7.9 Calibration curve
- 7.10 Sample analysis
- 8 Calculation
- 9 Precision data [Go to Page]
- 9.1 General
- 9.2 Repeatability
- 9.3 Reproducibility
- 10 Test report
- Annex A (informative)Typical chromatograms
- Annex B (informative)Precision data [Go to Page]