| Suitability and Effectiveness of Relative Accuracy for Continuous Water Quality Measuring System |
| 수질연속자동측정기의 상대정확도 적합성 및 유효성 연구 |
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김승열1, 추용엽1, 김상윤1, 최종우2 |
1한국산업기술시험원
2국립환경과학원 |
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| Abstract |
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As a step to improve relative accuracy test for continuous water monitoring equipment (CWMS) and to respond to consolidated effluent limitation guideline for the effluents discharged to surface water and municipal sewage treatment plant, this study proposes scientifically proven and reasonable methods for relative accuracy test. The current relative accuracy test of the performance standards for CWMS does not accurately reflect accuracy of the equipment especially tested by water samples containing low contents of target analytes. This study focuses on accuracy test and proposes new accuracy test methods considering minimum detectable level (MDL) and effluent characteristics through the comparison of standards of MCERTs, JIS and ISO. MCERTs suggested 10% of standard reference methods as performance standard when the measured reading value is above 0.5 mg/L. Otherwise it applies ± 0.05 mg/L. Therefore, this study sets up suitable percent (%) area of standard reference methods over item specific standard and decides special value considering percent of main test method (corresponding suitable area) error as suitable standard of error. This study presents improvement suggestion 20% of current standard, 10% of UK and Japan and 15% of standard considering domestic conditions as percent (%) of main test method and suggests suitability and effectiveness of the results of the performance standards. |
| Key Words:
Continuous water monitoring equipment, Relative accuracy, Precision, Accuracy |
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