Abstract:
:Infrared Spectrophotometry (IR) is now widely used to determine crystalline silica in industrial dust samples. Though the IR method has many advantages when dealing with respirable dust samples, some serious analytical errors are often caused by interference minerals contamination. These minerals have a characteristic absorption band corresponding in position to the analytical peak for crystalline silica. In this paper, six typical interference minerals (Kaolinite, Mullite, Muscovite, Pyrophyllite, Montmorillonite and Amorphous silica) were pre-size controlled to respirable range and their infrared spectra were measured by means of an FT-IR with the well-known potassium bromide tablet technique. The effects of these interference minerals on the Japanese OEL or the administrative control level for respirable dust which depend on the silica content were calculated and expressed in figures. The measured absorption coefficients of the interference minerals and quartz were 1.36-6.98 Abs/mg and 24.46 Abs/mg, respectively. The absorption band height ratios of each interference minerals were also measured. Then the efficiency and applicability of two spectrum correction methods for the interference minerals, absorbance ratio method and difference spectrum method were examined by using artificially mixed samples (standard interference mineral + standard quartz). By comparing the quantifying results for the mixture samples, it was revealed that the interfered spectra were almost corrected successfully when using the difference spectrum method, whereas correction by the absorbance ratio method resulted in apparent negative errors. Furthermore, the difference spectrum method was proven to be superior to the absorbance ratio method in applicability.
journal_name
J Occup Healthjournal_title
Journal of occupational healthauthors
Ojima Jdoi
10.1539/joh.45.94subject
Has Abstractpub_date
2003-03-01 00:00:00pages
94-103issue
2eissn
1341-9145issn
1348-9585journal_volume
45pub_type
杂志文章abstract::The present study examined degrees of job-related stress factors as well as mental and physical symptoms among Japanese hospital nurses in various departments, and clarified associations of departments and job-related stress factors with those symptoms. A self-administered anonymous questionnaire was distributed to 1,...
journal_title:Journal of occupational health
pub_type: 杂志文章,多中心研究
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更新日期:2008-01-01 00:00:00
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pub_type: 杂志文章
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pub_type: 杂志文章,随机对照试验
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更新日期:2008-01-01 00:00:00
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更新日期:2010-01-01 00:00:00
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pub_type: 杂志文章
doi:10.1539/joh.13-0244-cs
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更新日期:2018-11-27 00:00:00
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更新日期:2014-01-01 00:00:00
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pub_type: 杂志文章
doi:10.1002/1348-9585.12075
更新日期:2019-11-01 00:00:00
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journal_title:Journal of occupational health
pub_type: 杂志文章
doi:10.1539/joh.45.153
更新日期:2003-05-01 00:00:00
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pub_type: 杂志文章,评审
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更新日期:2020-01-01 00:00:00
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doi:10.1539/joh.13-0050-fs
更新日期:2014-01-01 00:00:00
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pub_type: 杂志文章
doi:10.1539/joh.12-0084-fs
更新日期:2012-01-01 00:00:00
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更新日期:2004-11-01 00:00:00
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更新日期:2011-01-01 00:00:00
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更新日期:2007-09-01 00:00:00
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pub_type: 杂志文章,评审
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更新日期:2005-01-01 00:00:00
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更新日期:2017-01-24 00:00:00
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更新日期:2019-07-01 00:00:00
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更新日期:2017-03-28 00:00:00
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更新日期:2011-01-01 00:00:00
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pub_type: 杂志文章,meta分析,评审
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更新日期:2009-01-01 00:00:00