Exposure-excretion relationship of styrene and acetone in factory workers : a comparison of a lipophilic solvent and a hydrophilic solvent

• Published in: Archives of environmental contamination and toxicology Vol. 25; no. 1; pp. 129 - 133
• Main Authors: MIZUNUMA, K, YASUGI, T, KAWAI, T, HORIGUCHI, S. I, IKEDA, M
• Format: Journal Article
• Language: English
• Published: Heidelberg Springer-Verlag 01.07.1993; Berlin; New York, NY
• Subjects: Acetone - blood; Acetone - pharmacokinetics; Acetone - urine; Adult; Air Pollutants, Occupational - blood; Air Pollutants, Occupational - pharmacokinetics; Air Pollutants, Occupational - urine; Biological and medical sciences; Chemical and industrial products toxicology. Toxic occupational diseases; Humans; Male; Medical sciences; Middle Aged; Occupational Exposure - analysis; Solvents; Styrene; Styrenes - blood; Styrenes - pharmacokinetics; Styrenes - urine; Toxicology; Human; Urine; Biological marker; Plastics processing industry; Occupational exposure; Blood; Biological monitoring; Toxicokinetics; Lipophilic compound; Organic solvent; Distribution; Styrene; Hydrophilic compound; Comparative study; Acetone
• ISSN: 0090-4341; 1432-0703
• DOI: 10.1007/bf00230723

A factory survey was conducted in the second half of a working week on 41 exposed male workers, who were engaged in fiber-reinforced plastics work and exposed to the mixed vapors of styrene and acetone. Nonexposed workers, 20 men, were recruited from the same factory. Styrene and acetone in respiratory zone air were monitored for a 8-h shift with carbon cloth- and water-equipped personal diffusive samplers, respectively. Blood and urine samples were collected at the shift-end. Acetone and styrene concentrations in whole blood, serum and urine were measured by head-space gas chromatography, and phenylglyoxylic acid in urine by high-performance liquid chromatography. All biological exposure indicators analyzed correlated significantly with the intensity of exposure to the corresponding solvent during the shift. The slopes of the regression lines indicate that a very small fraction of styrene absorbed will be excreted into urine as styrene per se, and that styrene is quite effectively excreted into urine after metabolic conversion. In contrast, the slopes of regression lines for acetone suggest that acetone distributes both in the blood and urine quite evenly. When the distribution of the solvent in serum was compared with that in the whole blood, it was found that almost all of styrene in blood is present in the serum, whereas acetone distributed very evenly in the cellular and noncellular fractions of the blood.