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http://dx.doi.org/10.14249/eia.2015.24.2.154

Correlation of Urinary Hippuric Acid Concentration according to Occupational Exposure Level of Toluene and Worker's Characteristics  

Lee, Gye-Young (Department of Environmental Engineering, Chungbuk National University)
Shin, Taek-Soo (Department of Environmental Engineering, Chungbuk National University)
Hong, Sang-Pyo (Department of Environmental Engineering, Cheongju University)
Kim, Kwangyul (Department of Environmental Engineering, Chungbuk National University)
Publication Information
Journal of Environmental Impact Assessment / v.24, no.2, 2015 , pp. 154-162 More about this Journal
Abstract
Correlation between occupational exposure levels to toluene and urinary hippuric acid (HA) concentrations were studied for 124 workers at 54 work places. The highest indoor toluene concentration measured at printing process was 81.116 ppm, and their geometric average concentration was as high as 12.304 ppm. The geometric average concentration of hippuric acid in urine samples from workers who are exposed to toluene was 0.714 g/g creatinine. This is almost five times higher than the average HA concentration from non-exposure workers. Printing workers showed the average HA concentration of 1.145 g/g creatinine from their urine samples. It is the highest concentration among the workers exposed to toluene. The correlation coefficient between HA concentrations in urine and indoor toluene concentration at work places was relatively high as r=0.624 (P<0.01). But the correlations of HA with sex, smoking, drinking, age and employment history was relatively low. We can express the regression equation for the urinary HA concentration which is Y = 0.037X + 0.562 as exposure toluene concentration is X. The urinary HA concentrations showed significantly increase depend on indoor toluene concentration at work place.
Keywords
Occupational Exposure Level; Toluene; Hippuric acid(HA);
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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