منابع مشابه
Gas chromatographic determination of urinary o-cresol for the monitoring of toluene exposure.
A sensitive and reproducible gas chromatographic procedure for the quantitative determination of urinary o-cresol is described. The first step involves acid hydrolysis (2N HCl, 100 degrees C, 10 min), which yields unconjugated o-cresol. After extraction (methylene chloride, pH 2), the organic layer is concentrated by evaporation and samples are analyzed by gas chromatography-flame ionization de...
متن کاملExperimental exposure to toluene: further consideration of cresol formation in man.
In two separate experiments 10 healthy men each were exposed at rest in an exposure chamber to about 200 ppm toluene in the air. Hippuric acid, o-, m-, p-cresol, and phenol in urine were detected by capillary gas chromatography at the beginning and at the end of exposure, and at variable times after the cessation of exposure. In addition toluene in blood was determined at the same intervals. Th...
متن کاملReproductive toxicology. o-Cresol.
Background: Data from Egyptian studies provide widely varying estimates on the prevalence of premalignant and malignant cervical abnormalities and human papilloma virus (HPVs) infection. To define the prevalence and risk factors of pre-invasive and invasive cervical cancer (cacx), a community based full-scale cross sectional, household survey including 5453 women aged between 35 and 60 years wa...
متن کاملUrinary hippuric acid concentration after occupational exposure to toluene.
The results of industrial investigations have shown a correlation between the rate of hippuric acid excretion in a single urine sample collected after daily occupational exposure and the amount of toluene absorbed. The rate of hippuric acid excretion and the average concentration of toluene vapour during exposure time were also related. The quantitative range of the test has been limited to amo...
متن کاملTentative criteria for assessing workers exposure to toluene by urinary toluene screening.
This study assessed screening thresholds for determining workers exposure to toluene (Tol) by urinary Tol (Tol-U) and proposed applicable criteria for on-site settings. Participants' urine samples (n = 21) were collected at the end of the workday during the latter half of a week and the Tol-U concentration was assayed. Simultaneously, each worker's exposure dose to Tol in the breathing zone dur...
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ژورنال
عنوان ژورنال: Scandinavian Journal of Work, Environment & Health
سال: 1979
ISSN: 0355-3140,1795-990X
DOI: 10.5271/sjweh.3103