For this method,samples are collected closed-face by drawing known volumes of air through sampling devices consisting of three-piece cassettes, each containing two sulfuric acid-treated glass fiber filters separated by a spacer. Analysis is performed by extracting the filters with methyl alcohol and analyzing the free amines by high-performance liquid chromatography using an ultraviolet detector.

Analysis Type (Application Method): HPLC

Link to OSHA 78 Method

Compatible Filters:

37 mm Glass fiber filter type A/E in a 3 piece cassette holder (polystyrene cassettes without support pads). Forceps to handle filter membrane.


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