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KMID : 0381319830220010001
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Korean Journal of Occupational Health
1983 Volume.22 No. 1 p.1 ~ p.6
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The Comparision for the Relative and Weighing Methods of the Airborne Dust Concentration
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정광호/Chung, Kwang Ho
성수원/안규동/Sung, Soo Won/Ahn, Kyu Dong
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Abstract
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This experiment was carried out to investigate the correlation of accuracy among five kinds of instruments which determined an airborne dust at the various locations of same type work.
The results obtained were as follows;
1. Digital dust indicator-P type (DDI-P) instrument for determination of relative concentration was found not having significant variations shen it was used without corrective coefficient to the quantitative concentration at the places with a few airborne dust in office and laboratory room.
2. Generally, there were the high correlations between determination values resulted by Digital dust indicator (DDI) and Piezobalance (PB). However, the correlation of two instruments to a filter weighing method was insignificant when the scattering amounts of airborn dust and the work shops were different in the same type work. After determining several times(at least 5 times and over), it was desirable to fix the corrective-coefficient.
3. When the size of the particles of airborne dust was large or its concentration was high in suspended airborne dust, the determination values of High volume air samplerRespiralbe (HVS(R)) were 2-4 times higher than that of Low volume air samplerRespiralbe (LVS(R)).
4. The emyloyment of corrective coefficient for determination values of DDI and PB was not appropriate to HVS(R) comparing with LVS(R) because of the significant changeable differences.
In addition, the determination instruments for relative concentration was not appropriate to using by itself at a manufactruing process.
There were also problems about sampling time and evaluation when it was determined the total airborne dust with the open face type holder.
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