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KMID : 0895419940040010096
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Journal of Korean Society of Occupational and Enviromental Hygiene
1994 Volume.4 No. 1 p.96 ~ p.102
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A Study on the Analytical Errors of Non - proficient Laboratories Participated in Quality Control Program
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신용철
오세민/박승현/백남원/박동욱/이나루/윤충식
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Abstract
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Factors affecting non-proficient analytical ability were compared and evaluated by rating of laboratories and round. Analyst Indices between proficient and non-proficient participants were different. Coefficients of determination(R²) for standard of toluene, xylene and trichloroethylene of the 4th round between some proficient and non-proficient participants were significantly different(p$lt;0.05). But, there was no difference in the 5th round. Average desorption efficiency of non-proficient participants was 88%-98%, which was lower than 96%-100% of some randomly selected proficient participants. Also non-proficient participants have a large variance of desorption efficiency, 11.79-19.69%. In the 5th round, desorption efficiency of metyl iso-butyi ketone(MIBK) reported by all participants was lower than 90% tested by NIOSH and especially low compared to other analyses. Participants evaluated to be non-proficient in the metal part have 85%-100.84% of average recovery, which was larger variance than 98% of some proficient participants. Although it is difficult to find quantitatively factors causing non-proficiency in analytical ability, pretreatment techniques and experience of analyst seems to be more important factors to produce accurate analytical result.
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