eLibrary >
ISO 21863:2020 Water quality - Determination of alkylmercury compounds in water - Method using gas chromatography-mass spectrometry (GC-MS) after phenylation and solvent extraction >
Expand All
TOC Search:
ISO 21863:2020 Water quality - Determination of alkylmercury compounds in water - Method using gas chromatography-mass spectrometry (GC-MS) after phenylation and solvent extraction, 2020
- Foreword
- Introduction
- 1 Scope
- 2 Normative references
- 3 Terms and definitions
- 4 Principle
- 5 Interferences
- 5.1 Interferences with sampling, sample storage and sample preparation
- 5.2 Interferences with GC-MS
- 6 Reagents and standards
- 7 Apparatus and materials
- 8 Sample collection, preservation and storage
- 9 Procedure
- 9.1 Sample preparation
- 9.1.1 pH-adjustment of water sample
- 9.1.2 Phenylation and solvent extraction
- 9.1.3 Dehydration of toluene extract
- 9.2 Preparation of samples for GC‑MS
- 9.3 Optimization of operating condition for GC‑MS
- 9.4 Identification of individual substances with GC‑MS
- 9.5 Blank tests
- 10 Calibration
- 10.1 General requirements
- 10.2 Performance test of GC‑MS
- 10.3 Calibration with internal standard
- 10.3.1 General requirement
- 10.3.2 Procedure of calibration
- 10.4 Spike recovery test of target substances
- 11 Calculation
- 11.1 Calculation of results after calibration with internal standards
- 11.2 Treatment of results lying outside the calibration range
- 11.3 Quality checks for internal standardization
- 12 Expression of results
- 13 Test report
- Annex A (informative) Example of operating condition of GC-MS
- Annex B (informative) Examples of mass chromatograms and mass spectra of phenylated alkylmercury by GC-MS
- Annex C (informative) The use of sodium tetrapropylborate as an alternative derivatizing agent[4]
- Annex D (informative) The use of GC-AFS as an alternative detector
- Annex E (informative) Performance data
- Bibliography [Go to Page]