산업폐수 중 노닐페놀류 측정불확도 산출
Estimation of Measurement Uncertainty for Nonylphenol Compoundsin Industrial Wastewater
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초록
This study focuses on quantifying the impact of various factors on nonylphenol analysis and identifying the key contributors affecting the analytical outcomes. We calculated the measurement uncertainty arising from the analysis process using GC-MS, aiming to pinpoint uncertainty sources, quantify them numerically and then calculated the overall uncertainty through uncertainty synthesis. The results revealed that factors such as calibration curve construction, internal standard injection, and reproducibility through repeated testing significantly influenced the synthetic standard uncertainty. Negligible effects were observed during processes, involving concentration and filling the standard volume post-purification, as well as during sample collection. The relative expanded uncertainty for nonylphenol concentration was within 4.6%. The uncertainty contributions from each step were as follows: sample collection, calibration curve construction, injection of internal standards, filling of the 1 mL standard volume, and reproducibility from repeated testing accounted for 0.0%, 92.7%, 4.0%, 0.1%, and 3.2% of the total uncertainty, respectively.
Abstract
This study focuses on quantifying the impact of various factors on nonylphenol analysis and identifying the key contributors affecting the analytical outcomes. We calculated the measurement uncertainty arising from the analysis process using GC-MS, aiming to pinpoint uncertainty sources, quantify them numerically and then calculated the overall uncertainty through uncertainty synthesis. The results revealed that factors such as calibration curve construction, internal standard injection, and reproducibility through repeated testing significantly influenced the synthetic standard uncertainty. Negligible effects were observed during processes, involving concentration and filling the standard volume post-purification, as well as during sample collection. The relative expanded uncertainty for nonylphenol concentration was within 4.6%. The uncertainty contributions from each step were as follows: sample collection, calibration curve construction, injection of internal standards, filling of the 1 mL standard volume, and reproducibility from repeated testing accounted for 0.0%, 92.7%, 4.0%, 0.1%, and 3.2% of the total uncertainty, respectively.
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