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KMID : 0895420130230020075
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Journal of Korean Society of Occupational and Enviromental Hygiene
2013 Volume.23 No. 2 p.75 ~ p.83
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Analysis of Quartz Concentrations by FTIR-DOF and FTIR-Transfer method in Concrete Manufacturing Industries
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Bae Hye-Jeong
Jung Jong-Hyeon
Phee Young-Gyu
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Abstract
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Objectives: This study was conducted to estimate quartz concentrations in the airborne respirable dust from concrete manufacturing industries and to compare performance of two analytical methods; direct on filter(DOF) and the transfer methods in the Fourier Transform Infrared Spectroscopy(FTIR).
Methods: Total 36 area samples were collected from 8 concrete manufacturing industries. Each respirable dust sample was collected by a 25 mm cassette attached to a 10 mm Dorr-Oliver nylon cyclone. The quartz content was estimated using the intensity of the absorption peak of quartz at 799 cm-1 by FTIR.
Results: By the comparison of quartz content in respirable dust between the two methods; the results of using DOF method were higher than that of transfer method. And the result of quartz concentrations in respirable dust estimated by DOF method were mostly higher than those by transfer method. Statistically significant difference of quartz concentrations in respirable dust were not found in shakeout; input; loading and transporting processes by two methods. But quartz concentrations in the molding process had the statistically significant difference between DOF and transfer method.
Conclusions: The results of the study is suggested that; it be needed to correct the influence of the interferences in order to establish the DOF method when interfering minerals have an effect on quantitative analysis of quartz in respirable dust by the direct on filter method with FTIR.
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KEYWORD
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concrete, FTIR, quartz, direct on filter, transfer method
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