Table 1.

Airborne exposures and the associated urinary metabolite measured by LC-MS/MS.

Exposure	Metabolite (acronym)
Polycyclic aromatic hydrocarbons
Naphthalene	2-naphthol
Fluorene	1-hydoxyfluorene
	2-hydroxyfluorene
	3-hydroxyfluorene
Phenanthrene	1-hydroxyphenanthrene
	2-hydroxyphenanthrene
	3,4-hydroxyphenanthrene
Pyrene	1-hydroxypyrene
Volatile Organic Compounds
Benzene	phenylmercapturic acid (PMA)
1,3- butadiene	4-hydroxy-2-buten-1-yl-mercapturic acid (MHBMA-3)
Ethylene oxide, acrylonitrile, vinyl chloride	2-hydroxyethylmercapturic acid (HEMA)
Methylating agents	methylmercapturic acid (MMA)
Acrylonitrile	2-cyanoethylmercapturic acid (CNEMA)
Acrolein	3-hydroxypropylmercapturic acid (3HPMA)
Propylene oxide	2-hydroxypropylmercapturic acid (2HPMA)
Acrylamide	2-carbamoylethylmercapturic acid (AAMA)
Crotonaldehyde	3-hydroxy-1-methyl-propylmercapturic acid (HPMMA)