수질분야 총유기탄소 분석방법에 따른 장비별 특성 비교 (Comparison of Instrument Characteristics on the Total Organic Carbon Analysis Method in Water Samples)

김혜성 (Hye-Sung Kim); 황은태 (Eun-Tae Hwang); 이찬근 (Chan-Geun Lee); 조영철 (Ji-Min Lee)

Comparison of Instrument Characteristics on the Total Organic Carbon Analysis Method in Water Samples

Journal of Environmental Impact Assessment
Abbr : J EIA
2023, 32(5), pp.353~362
Publisher : Korean Society Of Environmental Impact Assessment
Research Area : Engineering > Environmental Engineering
Received : September 18, 2023
Accepted : October 5, 2023
Published : October 30, 2023

Hye-Sung Kim ¹, Eun-Tae Hwang ², Chan-Geun Lee ³, Ji-Min Lee ¹

¹충북대학교
²FITI 시험연구원
³(재)FITI시험연구원

Accredited

ABSTRACT

TOC, which can measure more than 90% of organic substances, can be measured quickly and easily,replacing BOD and COD, which were indicators of organic pollutants. According to water quality pollution control standards, when measuring TOC, if the inorganic carbon ratio in the sample is over 50%, the NPOC (Non-Purgeable Organic Carbon) method should be used. If volatile organic compounds (VOCs) are present at a certain concentration, the TC-IC (subtracting inorganic carbon from total carbon) method should be used. To validate the limitations of these analytical conditions, experiments were conducted by varying the ratio of TOC to IC in purified water and measuring the concentration of TOC in test solutions. The results showed no significant difference between the TCIC method and the NPOC method. When measuring samples with added VOC standard solutions, it was observed that the carbon loss due to purging was not significant when using the NPOC method. Therefore, it is concluded that the choice of analytical method does not lead to significant differences when VOCs are present in the sample. To account for potential variations in results based on water quality pollution control standards and regulations regarding the approval and testing of environmental measurement devices, a comparison of field sample concentration values was made using two widely used types of TOC analyzers in Korea. The results showed variations of 0.02 to 0.83 mg/L between methods depending on the manufacturer, highlighting the need for caution when selecting an instrument.

KEYWORDS

water pollution process test standard, notice on type approval and quality inspection of environmental measuring equipment, inorganic carbon, volatile organic compound, total organic carbon analyzer

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* References for papers published after 2023 are currently being built.

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Journal of Environmental Impact Assessment 2023 KCI Impact Factor : 0.51

Comparison of Instrument Characteristics on the Total Organic Carbon Analysis Method in Water Samples

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* References for papers published after 2023 are currently being built.

Journal of Environmental Impact Assessment 2023 KCI Impact Factor : 0.51

Comparison of Instrument Characteristics on the Total Organic Carbon Analysis Method in Water Samples

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