EN 13130-8:2004

Foreword
1 Scope
2 Normative references
3 Principle
4 Reagents
   4.1 Analytes
   4.2 Reagents
5 Apparatus
   5.1 General
6 Samples
7 Procedure
   7.1 Test sample screening
       7.1.1 Test sample extraction and derivatization
       7.1.2 Preparation of reagent blank sample
       7.1.3 Preparation internal standard check sample
       7.1.4 Preparation un-derivatized sample blank
       7.1.5 Chromatographic determination
   7.2 Quantification of isocyanates by standard addition
       7.2.1 General
       7.2.2 Preparation of standard solutions for quantification
             (0 micro g/ml to 5 micro g/ml)
       7.2.3 Procedure for standard addition
       7.2.4 Control sample
       7.2.5 Analysis
   7.3 Evaluation of data
       7.3.1 General
       7.3.2 HPLC interferences
8 Expression of results
   8.1 Calculation by least squares regression
   8.2 Graphical determination of using internal standard
   8.3 Precision data and detection limit
       8.3.1 General
       8.3.2 Repeatability
       8.3.3 Reproducibility
       8.3.4 Detection limits
9 Confirmation
   9.1 Requirement of confirmation
   9.2 Confirmation by re-analysis on an HPLC column of
       different elution characteristics
10 Test report
Annex A (normative) Calibration by standard addition omitting
        the internal standard
Annex B (informative)
Annex C (informative) Suggested gradient profile
Bibliography

This part of this European Standard describes a method for the determination of individual and total levels of residual isocyanates in plastics materials and articles.This method is applicable to the analysis of polyurethane polymers. The total level of isocyanate monomers in materials and articles determined according to the procedure described in this standard is given in milligrams of NCO per kilogram of material or article. The method is capable of quantitative determination of individual isocyanates measured as NCO at 0,04 mg/kg and total isocyanates at 1,0 mg/kg.NOTEThe method has been applied to the analysis of 9 isocyanate monomers listed in 3.1. It has not been applied to the analysis of octadecyl isocyanate, diphenylether-4,4'-diisocyanate or 3,3'-dimethyl-4,4'-diisocyanatobiphenyl as samples of these monomers have not been obtained. There is no reason to anticipate that the method may not be suitable for the analysis of these monomers also.