• Accurately samples diisocyanates: HDI, MDI, IPDI, HMDI, 2,4-TDI, and 2,6-TDI.
  • The only filter-based sampling system that simultaneously traps and separates both monomers and oligomers; meets the specifications of several ASTM methods


Collection Method Dual filter cassette; 5-(m PTFE membrane traps aerosol phase, glass fiber filter impregnated with MAMA collects vapor phase
Sample Flow Rate 1 L/min
Sample Time 15 minutes
Derivatizing Reagent
(filter coating for vapor phase)
9-(N-methylaminomethyl) anthracene (MAMA)
Reagent Stability 10 months at ambient temperature
Derivatizing Solution
(for aerosol phase)
1-(2-Methoxyphenyl) piperazine (MOPIP)
Sample Stability Can be stored at 39.2 F (4 C) for up to 10 days. SKC recommends sample analysis as soon as possible.
Analysis Reverse phase HPLC with UV and fluorescence detection
Quantitation Limit 0.15 ppb for 2,4-TDI, 2,6-TDI, 1,6-HDI, IPDI, MDI, HMDI monomer
1.5 ppb for 1,6-HDI and MDI oligomers
Limit of Detection 0.2 mg/m3 for 2,4-TDI and 2,6-TDI
0.6 mg/m3 for 1,6-HDI
0.3 (UV)/0.08 (FD) mg/m3 ** for MDI

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