chemical and physical properties further complicate collection; the choice of
measurement technique depends on the objectives of data collection, including
the chemical species of interest, funds available, and desired detection
include TO-5 which had lower sensitivity and reproducibility and was more
labor-intensive. Method TO-11A uses
coated dinitrophenylhydrazine (DNPH) cartridges to collect the samples and
analyzes them using high performance liquid chromatography (HPLC).
|TO-13A allows for a
variety of sampling media; an effective choice is the combination of
polyurethane foam (PUF) and XAD-2®. Samples are analyzed by high resolution gas
chromatography/mass spectrometry (GC/MS).
|TO-15 uses specially
prepared canisters analyzed by high resolution gas chromatography/mass