Maria Inês Couto Monteiro

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The total Kjeldahl nitrogen (TKN) method was simplified by using a manifold connected to a purge-and-trap system immersed into an ultrasonic (US) bath for simultaneous ammonia (NH(3)) extraction from(More)
A method for determination of Co, Cr, Cu, Fe, Mn, Ni, Ti, V and Zn in coal fly ash samples using ultrasound-assisted digestion followed by inductively coupled plasma optical emission spectrometry(More)
The aim of this study was to analyze whether job market status is associated with differences in health services access and use. Data from the Brazilian National Household Sample Survey (PNAD/2008)(More)