文章基本信息

标题：Use of Inhalable Cr+6 Exposures to Characterize Urinary Chromium Concentrations in Plating Industry Workers
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作者：Jyh-Larng CHEN ; Yue-Liang GUO ; Perng-Jy TSAI 等
期刊名称：Journal of Occupational Health
印刷版ISSN：1341-9145
电子版ISSN：1348-9585
出版年度：2002
卷号：44
期号：1
页码：46-52
DOI：10.1539/joh.44.46
出版社：Japan Society for Occupational Health
摘要：In this study, both personal sampling and biological monitoring were conducted on 27 and 30 workers selected from decorative plating and hard-surface plating operation, respectively. For personal sampling, the inhalable aerosol sampling technique was adopted in order to measure worker’s soluble Cr⁺⁶ exposure level (C_INH) on the last day of the workweek. For biological monitoring, a urine specimen was collected at the end of the shift on the last day of the work week in order to determine a worker’s urinary chromium concentration (C_URINE). Results show that hard-surface plating workers had higher C_INH (arithmetic mean ≈ 25.2 μg/m³) than decorative plating workers (arithmetic mean ≈ 1.91 μg/m³). The above results could be due to the longer plating time involved in the former plating operation than in the latter. The relationship between C_INH and C_URINE was found as C_URINE=1.86 C_INH-0.21(R²=0.87, n=57), which suggests that the inhalable aerosol sampling results were able to explain the variation in workers’ urinary chromium concentrations up to 87%. Assuming the level of C_INH was equivalent to the current TLV-TWA of 50 μg/m³, the above regression model yielded a level of C_URINE as approximately 93 μg/g·creatinine. The above value is clearly different from the current present biological exposure index BEI of 30 μg/g·creatinine which is known to be applicable only to welding workers. The above discrepancy could be due to the intrinsic difference in particle size distribution between the Cr⁺⁶ droplets generated during the plating process and Cr⁺⁶ fumes generated during the welding process. Considering that no BEI has been suggested for chromium plating industries, the result obtained in this study will be helpful in introducing a new BEI in the future.
关键词：Chromium plating;Inhalable aerosol sampling;Soluble Cr+6 exposures;Urinary chromium concentration