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http://dx.doi.org/10.7857/JSGE.2013.18.5.015

A Study on the Development of Soil-based PTMs for Analysis of BTEX  

Lee, Minhyo (National Instrumentation Center for Environmental Management, Seoul National University)
Lee, Guntaek (National Instrumentation Center for Environmental Management, Seoul National University)
Lee, Bupyoel (National Instrumentation Center for Environmental Management, Seoul National University)
Lee, Wonseok (National Institute of Environmental Research)
Kim, Gumhee (National Institute of Environmental Research)
Hong, Sukyoung (National Institute of Environmental Research)
Publication Information
Journal of Soil and Groundwater Environment / v.18, no.5, 2013 , pp. 15-25 More about this Journal
Abstract
In this study, two kinds of soil-based proficiency testing materials (PTMs), NICE-012L and NICE-012R were prepared and certified for Benzen, Toluene, Etylbenzene and Xylene with evaluation of uncertainties. In order to analyse BTEX (Benzen Toluene Etylbenzene Xylene) for the candidate materials, GC/MS was used after pretreatment according to methods of soil analysis by Ministry of Environment. For the homogeneity test among bottles in terms of candidate materials, ISO 13528 and IUPAC Protocol were used and according to the result, both candidate materials showed sufficient homogeneity. Also, the stability test over the candidate materials was accessed according to the ISO Guide 35 by classifying short-term and long-term stability and the result showed that both candidate materials showed decent stability. The reference values of the two candidate materials depending on BTEX components were derived from the average of the 11 samples that were used for verification of the samples' homogeneity. Uncertainty of measurement was combined by uchar that was caused by a characteristic value, $u_{bb}$ that was caused by between-bottle homogeneity, and $u_{stab}$ that was caused by stability, and then combined uncertainty ($u_{PTM}$) was multiplied to the coverage factor (k) derived from the effective degree of freedom from each factor that leads to expanded uncertainty (U) in about 95% of confidence level. The proficiency testing materials developed through this study were supplied to National Institute of Environmental Research (NIER) and utilized as an external proficiency testing materials for evaluating analysis capacity of soil agencies with specialty in terms of soil analysis approved by Minister of Environment.
Keywords
Proficiency testing materials (BTEX); Reference value; Homogeneity; Stability; Coverage factor (k);
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  • Reference
1 Australian Government, National Measurement Institute (NMI), 2010, Proficiency Study AQA 9-15, Hydrocarbons in soil, 32 p.
2 Cole, G.M., 1994, Assesment and Remediation of Petroleum Contaminated Sites, LEWIS PUBLISHERS, 56 p.
3 ISO 13528, 2005, Statistical methods for use in proficiency testing interlaboratory comparisons, p. 56-57.
4 ISO Guide 35, 2004, Certification of reference materials-General and statistical principles, p. 7-8, 43-47.
5 Kim, G.H., Kim, K.Y., Sa, D.M., Seo, J.S., Son, B.G., Yang, J.E., Eom, K.C., Lee, S.E., Jeong, K.Y., Jeong, D.y., Jeong, Y.T., Jeong, J.B., and Hyeon, H.N., 2006, Soil science, Hyangmunsa, 174 p.
6 KOLAS-G-002, 2007, Guide to the Expression of Uncertainty in Measurement, p. 71-76.
7 KS E 3076, 2002, Methods for X-ray fluorescence spectrometic analysis of silica stone and silica sand, p. 1-4.
8 KS L 1614, 2001, Determination of particle size distributions for fine ceramic raw powders by laser diffraction method, p. 1-9.
9 KS L ISO 18757, 2003, Fine ceramics (advanced ceramics, advanced technical ceramics) -- Determination of specific surface area of ceramic powders by gas adsorption using the BET method, p. 1-10.
10 Lee, M.H., 2003, Environment of soil and groundwater, Donghwa Publishing Co., 26 p.
11 Ministry of Environmen (MOE), 2012, Soil Environment Conservation Act.
12 Ministry of Environment (MOE), 2009, Soil Contamination Official Testing Standards, p. 214-229.
13 Ministry of Environment (MOE), 2010a, Waste Official Testing Standards, p. 58-61.
14 Ministry of Environment (MOE), 2010b, Test and Inspection Act on Environmental Fields.
15 National Academy of Agricultural Science (NAAS), 2010, Method for analysis of soil physico-chemical properties, p. 18- 19, p. 23-29.
16 National Institute of Environmental Research (NIER), 1999, Handbook of Environmental Science (2rd Edition), p. 1059-1090.
17 Raymond N, Yong, Abdel M.O. Mohamed and Benno P. Warkentin, 1992, Principles of Contaminant Transport in Soils, ELSEVIER, p. 176-180.
18 THE INTERNATIONAL HARMONIZED PROTOCOL FOR THE PROFICIENCY TESTING OF ANALYTICAL CHEMISTRY LABORATORIES (IUPAC Protocol), 2006, Pure Appl. Chem., 78(1), 145-196.   DOI
19 US Environmental Protection Agency (EPA), 1977, Serial No. 95-12, US Goverment Printing Office, Washington, D.C.
20 US Environmental Protection Agency (EPA), 2007, Resource Conservation and Recovery Act, Subtitle C.