ISO 19619:2018
Surface active agents — Determination of free propylene oxide content in propylene oxide adduct surfactants — GC method
ISO 19619:2018 specifies an analytical procedure for the determination of free propylene oxide in surfactants which are synthesized from propylene oxide copolymers.
The method is appropriate for the qualitative and quantitative determination of propylene oxide groups in propylene oxide adducts, polyethers and polyglycol esters by headspace gas chromatography (HS-GC) with a flame ionization detector (FID) based on external procedure. Gas chromatography-mass spectrometry (GC-MS) is used for the confirmatory purposes.
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Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Principles
5 Reagents
6 Apparatus
7 Preparation of calibration solutions
7.1 Standard solutions
7.1.1 General
7.1.2 Difference weighing
7.1.3 Commercial standard vial
7.2 Calibration solutions
8 Sampling and preparation of the test sample
8.1 Preparation of the test sample
8.2 Determination
8.3 Qualitative determination
8.4 Quantitative determination
9 Chromatographic and mass spectrometer conditions
10 Evaluation
10.1 General
10.2 Identification
10.3 Calculation
11 Precision
11.1 Repeatability
11.2 Reproducibility limit
12 Test report
Annex A (informative) Statistical data from the ring carried out
Bibliography
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Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Principles
5 Reagents
6 Apparatus
7 Preparation of calibration solutions
7.1 Standard solutions
7.1.1 General
7.1.2 Difference weighing
7.1.3 Commercial standard vial
7.2 Calibration solutions
8 Sampling and preparation of the test sample
8.1 Preparation of the test sample
8.2 Determination
8.3 Qualitative determination
8.4 Quantitative determination
9 Chromatographic and mass spectrometer conditions
10 Evaluation
10.1 General
10.2 Identification
10.3 Calculation
11 Precision
11.1 Repeatability
11.2 Reproducibility limit
12 Test report
Annex A (informative) Statistical data from the ring carried out
Bibliography