Dokument-ID Dokumenttyp Autoren/innen Persönliche Herausgeber/innen Haupttitel Abstract Auflage Verlagsort Verlag Herausgeber (Institution) Erscheinungsjahr Titel des übergeordneten Werkes Jahrgang/Band ISBN Veranstaltung Veranstaltungsort Beginndatum der Veranstaltung Enddatum der Veranstaltung Ausgabe/Heft Erste Seite Letzte Seite URN DOI Lizenz Datum der Freischaltung OPUS4-47143 Zeitschriftenartikel Duewer, D. L.; Murray, J. A.; Wood, L. J.; Wise, S. A.; Hein, Sebastian; Koch, Matthias; Philipp, Rosemarie; Werneburg, Martina; Hackenberg, R.; Polzer, J.; Avila, M. A.; Serrano, V.; Kakoulides, E.; Alexopoulos, C.; Giannikopoulou, P.; Gui, E. M.; Lu, T.; Teo, T. L.; Hua, T.; Dazhou, C.; Chunxin, L.; Changjun, Y.; Hongmei, L.; Nammoonnoy, J.; Sander, L. C.; Lippa, K.; Quinn, L.; Swiegelaar, C.; Fernandes-Whaley, M.; Gören, A. C.; Gökcen, T. CCQM-K95.1 Low-polarity analytes in a botanical matrix: Polycyclic aromatic hydrocarbons (PAHs) in tea Extraction, chromatographic separation, and quantification of low-concentration organic compounds in complex matrices are core challenges for reference material producers and providers of calibration services. Evidence of successful participation in formal, relevant international comparisons is needed to document measurement capability claims made by national metrology institutes (NMIs) and designated institutes (DIs). To enable NMIs and DIs to update or establish their claims, in 2014 the Organic Analysis Working Group (OAWG) initiated CCQM-K95.1 "Low-Polarity Analytes in a Botanical Matrix: Polycyclic Aromatic Hydrocarbons (PAHs) in Tea". This was a follow-on comparison from CCQM-K95 which was completed in 2014. The polycyclic aromatic hydrocarbons (PAHs) benz[a]anthracene (BaA) and benzo[a]pyrene (BaP) are considered priority pollutants by U.S. Environmental Protection Agency and are regulated contaminants in food, pose chromatographic separation challenges, and for which exist well-characterized measurement procedures and standard materials. BaA and BaP in a smoked tea were therefore selected as representative target measurands for CCQM-K95.1. Ten NMIs participated in CCQM-K95.1. The consensus summary mass fractions for the two PAHs are in the range of (50 to 70) ng/g with relative standard deviations of (6 to 10) %. Successful participation in CCQM K95.1 demonstrates the following measurement capabilities in determining mass fraction of organic compounds, with molar mass of 100 g/mol to 500 g/mol and having polarity pKow −2, in a botanical matrix ranging in mass fraction from 10 ng/g to 1000 ng/g: (1) value assignment of primary reference standards (if in-house purity assessment carried out), (2) value assignment of single and/or multi-component organic solutions, (3) extraction of analytes of interest from the matrix, (4) cleanup and separation of analytes of interest from interfering matrix or extract components, and (5) separation and quantification using gas chromatography or liquid chromatography. IOP Science 2019 Metrologia 56 1 A 08002, 1 89 urn:nbn:de:kobv:b43-471430 10.1088/0026-1394/56/1A/08002 https://creativecommons.org/licenses/by/4.0/deed.de 2019-01-08 OPUS4-47144 Zeitschriftenartikel Duewer, D. L.; Sander, L. C.; Wise, S. A.; Philipp, Rosemarie; Hein, Sebastian; Hackenberg, R.; Polzer, J.; Avila, M. A.; Serrano, V.; Kakoulides, E.; Alexopoulos, C.; Giannikopoulou, P.; Chan, P.; Lee, H.; Tang, H.; Tang, P.; Yip, Y.; Lu, T.; Cheow, P. S.; Teo, T. L.; Sega, M.; Rolle, F.; Baek, S.; Kim, B.; Lee, S.; Cabillic, J.; Fallot, C.; Hua, T.; Dazhou, C.; Changjun, Y.; Chunxin, L.; Hongmei, L.; Lippa, K.; Itoh, N.; Quinn, L.; Prevoo-Franzsen, D.; Fernandes-Whaley, M.; Gören, A. C.; Gökcen, T.; Gündüz, S.; Krylov, A.; Mikheeva, A.; Baldan, A.; van der Hout, J. W.; van der Veen, A. M. H. CCQM-K131 Low-polarity analytes in a multicomponent organic solution: Polycyclic aromatic hydrocarbons (PAHs) in acetonitrile Solutions of organic analytes of known mass fraction are typically used to calibrate the measurement processes used to determine these compounds in matrix samples. Appropriate value assignments and uncertainty calculations for calibration solutions are critical for accurate measurements. Evidence of successful participation in formal, relevant international comparisons is needed to document measurement capability claims (CMCs) made by national metrology institutes (NMIs) and designated institutes (DIs). To enable NMIs and DIs to update or establish their claims, in 2015 the Organic Analysis Working Group (OAWG) sponsored CCQM-K131 "Low-Polarity Analytes in a Multicomponent Organic Solution: Polycyclic Aromatic Hydrocarbons (PAHs) in Acetonitrile". Polycyclic aromatic hydrocarbons (PAHs) result from combustion sources and are ubiquitous in environmental samples. The PAH congeners, benz[a]anthracene (BaA), benzo[a]pyrene (BaP), and naphthalene (Nap) were selected as the target analytes for CCQM-K131. These targets span the volatility range of PAHs found in environmental samples and include potentially problematic chromatographic separations. Nineteen NMIs participated in CCQM-K131. The consensus summary mass fractions for the three PAHs are in the range of (5 to 25) μg/g with relative standard deviations of (2.5 to 3.5) %. Successful participation in CCQM-K131 demonstrates the following measurement capabilities in determining mass fraction of organic compounds of moderate to insignificant volatility, molar mass of 100 g/mol up to 500 g/mol, and polarity pKow < −2 in a multicomponent organic solution ranging in mass fraction from 100 ng/g to 100 μg/g: (1) value assignment of primary reference standards (if in-house purity assessment carried out), (2) value assignment of single and/or multi-component organic solutions, and (3) separation and quantification using gas chromatography or liquid chromatography. IOP Science 2019 Metrologia 56 1A 08003, 1 102 urn:nbn:de:kobv:b43-471442 10.1088/0026-1394/56/1A/08003 https://creativecommons.org/licenses/by/4.0/deed.de 2019-01-08