Sampling and Analysis of Isocyanates Used in Paints
Background
Commonly Used Aliphatic Isocyanate Monomers
Polyisocyanate Species Found in Paints
Polyisocyanate Species Found in Paints (cont.)
Complications in Total Isocyanate Determination
Six Steps in Sampling and Analytical Methods
Collection Efficiency Problems
Collection
Overspray Aerosol Particle Size
Derivatization
Factors Affecting Derivatization Efficiency
Impinger / Filter Comparisons
Sampling Recommendations
Sample Preparation
Analytical Separation: Reversed-Phase HPLC
Analytical Strategies
Bulk Product for Calibration
Monomer Calibration
HPLC: Isocratic or Gradient Elution?
Advantages of Isocratic Elution
Advantages of Gradient Elution
HDI/IPDI Oligomer Bulk
Identification of Derivatized Isocyanates
Quantification
Conclusions
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