Diisocyanates; 1,6-Hexamethylene Diisocyanate (HDI), Toluene-2,6-Diisocyanate (2,6-TDI), Toluene-2,4-Diisocyanate (2,4-TDI)

For this method, samples are collected by drawing a known volume of air through glass fiber filters coated with 0.1 mg of 1-(2-pyridyl)piperazine (1-2PP) which are contained in open-face cassettes. Samples are extracted with 90/10 (v/v) acetonitrile/dimethyl sulfoxide (ACN/DMSO) and analyzed by high performance liquid chromatography (HPLC) using an ultraviolet or fluorescence detector. (The coated filters used in Method 47 for MDI are also acceptable for this procedure. Those filters are coated with 1 mg instead of 0.1 mg of 1-2PP.)

Analysis Type (Application Method): HPLC

Link to OSHA 42 Method

Compatible Filters:

Glass fiber filter, coated with pyridyl piperazine in a 2 piece polystyrene cassette filter holder. Forceps to handle filter membrane.


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