66. Excretion Kinetics of Specific Mercapturic Acids in a Voluntary and a Group of Subjects Occupationally Exposed to Styrene

Environmental and biological monitoring of benzene in traffic policemen, police drivers and rural outdoor male workers

“…46 The following reference values were proposed for the general population not occupationally exposed to benzene: <500.0 ng L À1 for blood benzene, <300.0 mg g À1 creatinine (for non-smokers) for t,t-MA and <5.0 mg g À1 creatinine (for non-smokers) for S-PMA. 50,51 The laboratory was not aware of which samples came from the traffic policemen, police drivers or roadmen, although both physicians and technicians were aware that a research study was being carried out.…”

Determination of dichloromethane, trichloroethylene and perchloroethylene in urine samples by headspace solid phase microextraction gas chromatography–mass spectrometry

“…The biological exposure index (BEI ® ) proposed as guideline by the American Conference of Governmental Industrial Hygienists (ACGIH, 2002) is 200 g/l for urine DCM [17]. For TCE [18] and PCE [19], urine concentrations of 26 and 100 g/l have been detected after exposures to 50 and 25 ppm, respectively. Besides to be industrial chemicals, these compounds became ubiquitous environmental pollutants, and measurable concentrations were detected in the urine of the unexposed general population [20].…”