GB/T 18446-2001
Standard test method for unreacted toluene diisocyanates in urethane prepolymers and coatings solution by gas chromatography
JIS K 7301:1995
Testing methods for tolylene diisocyanate type prepolymers for thermosetting urethane elastomers
ASTM D3432-89(1996)e1
Standard Test Method for Unreacted Toluene Diisocyanates in Urethane Prepolymers and Coating Solutions by Gas Chromatography (Withdrawn 2004)