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Analytical problems encountered with NIOSH method 5521 for total iscyanates

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1001 ‎$0‎MAPA20080285500‎$a‎Key-Schwartz, Rosa J.
24510‎$a‎Analytical problems encountered with NIOSH method 5521 for total iscyanates‎$c‎Rosa J. Key-Schwartz
520  ‎$a‎A recent analysis for total isocyanates in air using National Institute for Occupational Safety and Health Method 5521 presented difficulties in the identification of an oligomeric isocyanate species. Two problems were encountered during the analysis. Two problems were encountered during the analysis. A false negative response in the high performance liquid chromatography chromatogram was encountered in a majority of the field samples
61007‎$0‎MAPA20080472740‎$a‎National Institute for Occupational Safety and Health
65011‎$0‎MAPA20080585679‎$a‎Higiene industrial
65011‎$0‎MAPA20080558994‎$a‎Isocianatos
65011‎$0‎MAPA20080631598‎$a‎Contaminación en ambientes laborales
65011‎$0‎MAPA20080591960‎$a‎Métodos de análisis
7400 ‎$a‎American Industrial Hygiene Association journal
7730 ‎$t‎American Industrial Hygiene Association journal‎$d‎Akron, Ohio‎$g‎Vol. 56, nº 5, May 1995 ; p. 474-479