EN ISO 18635:2016

European foreword
Foreword
Introduction
1 Scope
2 Normative references
3 Principle
4 Interferences
5 Reagents
6 Apparatus
7 Sampling and sample pretreatment
8 Procedure
9 Expression of results
10 Test report
Annex A (normative) - Programme for pressurized liquid
        extraction
Annex B (informative) - Explanation of the calibration of the
        sum of SCCPs with multiple linear regression
Annex C (informative) - Examples of typical GC-MS conditions
Annex D (normative) - Alternative clean-up with column
        chromatography
Annex E (informative) - Alternative clean-up with gel
        chromatography
Annex F (informative) - Typical chromatograms of standard
         solutions 1 [mu]g/ml
Annex G (informative) - Presentation of goodness of fit of
        the calibration
Annex H (informative) - Example for recoveries of
        quality assurance solutions
Annex I (informative) - Chromatograms of real samples
Annex J (informative) - Performance data
Annex K (informative) - Quality control check solutions
Bibliography

ISO 18635:2016 specifies a method for the quantitative determination of the sum of short-chain polychlorinated n-alkanes also known as short-chain polychlorinated paraffins (SCCPs) in the carbon bond range, n-C10 to n-C13, inclusive in mixtures with chlorine mass fractions ("contents") between 50 % and 67 %, including approximately 6 000 of approximately 8 000 congeners.This method is applicable to the determination of the sum of SCCPs in sediment and suspended (particulate) matter, sewage sludge, and soil using gas chromatography-mass spectrometry with electron capture negative ionization (GC-ECNI-MS).Depending on matrix and the detection capabilities of the GC-ECNI-MS, the method can be applied to samples containing, e.g. 0,03 µg/g to 3 µg/g sum of SCCPs.