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Anal Bioanal Chem

Title:		Certified reference material of volatile organic compounds for environmental analysis: BTEX in methanol
Author(s):		Neves LA; Almeida RR; Rego EP; Rodrigues JM; de Carvalho LJ; de MG;
Address:		"National Institute of Metrology, Quality and Technology -INMETRO, Division of Chemical Metrology, 25250-020, Duque de Caxias, RJ, Brazil, laneves@inmetro.gov.br"
Journal Title:		Anal Bioanal Chem
Year:		2015
Volume:		20141202
Issue:		11
Page Number:		3225 - 3229
DOI:		10.1007/s00216-014-8314-6
ISSN/ISBN:		1618-2650 (Electronic) 1618-2642 (Linking)
Abstract:		"The Brazilian Metrology Institute (National Institute of Metrology, Quality, and Technology, Inmetro) has been developing a certified reference material (CRM) of the volatile organic compounds benzene; toluene; ethylbenzene; and ortho, meta, and para-xylenes (BTEX) in methanol, to ensure quality control for environmental-analysis measurements. The objective of this paper is to present the results of certification studies: uncertainty estimates related to characterization, a homogeneity study, and a stability study on a single lot of CRM composed of BTEX in methanol. The method used analysis of variance (ANOVA), a statistical tool, to evaluate the homogeneity and stability of the BTEX CRM, which complies with ISO Guide 30 series. The homogeneity and stability of the BTEX CRM was confirmed for all analytes and their respective properties. All the procedures used in this study complied with ISO GUIDE 34, ISO GUIDE 35, and the guide to the expression of uncertainty of measurement (GUM)"
Keywords:		Analysis of Variance Benzene/analysis Benzene Derivatives/analysis Environmental Monitoring/methods/*standards Methanol/analysis Reference Standards Toluene/analysis Uncertainty Volatile Organic Compounds/*analysis/*standards Xylenes/analysis;
Notes:		"MedlineNeves, Laura A Almeida, Renato R R Rego, Eliane P Rodrigues, Janaina Marques de Carvalho, Lucas Junqueira de M Goulart, Ana Leticia eng Research Support, Non-U.S. Gov't Germany 2014/12/03 Anal Bioanal Chem. 2015 Apr; 407(11):3225-9. doi: 10.1007/s00216-014-8314-6. Epub 2014 Dec 2"