Abstract
Atmospheric particulate matter (PM) is a pollutant composed by various metals, that when accumulated in the respiratory system may cause serious health problems. Methods IO-3.1 (metal extraction in PM) and IO-3.4 [metal determination by inductively coupled plasma optical emission spectrometry (ICP-OES)] are the recommended by the United State Environmental Protection Agency. With the intent to evaluate the performance of the method developed in our laboratory for the extraction of metal in PM with HNO3 p.a. bidistilled and determination by ICP-OES of Al, Ca, Cd, Cu, Cr, Fe, K, Mg, Mn, Na, Ni, Pb, Ti, V and Zn, validation was executed according to the criteria established by the INMETRO determining the parameters: selectivity, linearity, precision, accuracy, robustness, limits of detection and quantification, as well as the comparison of the efficiency and precision with IO-3.1 method. The results show that our method meets all validation criteria established by the INMETRO; furthermore, it shows to be equivalent to IO-3.1 method.
Highlights
Atmospheric particulate matter (PM) pollutant is regulated in Brazil by the National Environment Consul through Resolution No 03/1990.1 This resolution establishes the limit of daily exposure and continued exposure to particulate matter in suspension (PTS) and inhalable particulate matter (PM10)
The objective of this study was to validate a methodology developed in our lab in order to determine metals in particulate matter by inductively coupled plasma optical emission spectrometry (ICP-OES)
The first evaluation of selectivity was performed by a standard addition curve. This was prepared by adding acid to blank filter with volumes of 0.04 to 1.6 mL of multielement standard solution 50 mg L−1 foreseeing concentrations 0.2 to 8.0 mg L−1, which are concentrations that are commonly found in atmospheric particulate matter
Summary
Atmospheric particulate matter (PM) pollutant is regulated in Brazil by the National Environment Consul through Resolution No 03/1990.1 This resolution establishes the limit of daily exposure (average of 24 h) and continued exposure (annual average) to particulate matter in suspension (PTS) and inhalable particulate matter (PM10). Elements present in PM such as Zn, Cd, Cr, Co, Al, Fe, Mn, Ni, Pb and Cu present toxicological effects when bonded to short carbon atom chains or when they are present in their cation form and may form complexes that have a negative influence on the biological functions, affecting the normal operation of the tissues in the human body. These metals have non degradable characteristics; accumulate in our organisms and ecosystems
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