Total reflection X-ray fluorescence analysis of pollen as an indicator for atmospheric pollution |
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| Institution: | 1. ITC-irst, Centro per la Ricerca Scientifica e Tecnologica, via Sommarive 18, 38050 Povo, Trento, Italy;2. IASMA, Istituto Agrario di S. Michele all''Adige, Via Edmondo Mach 1, 38010 S. Michele all''Adige, Trento, Italy;3. APPA, Agenzia Provinciale Protezione Ambiente, Piazza A. Vittoria 5, 38100 Trento, Italy;4. Ital Structures, Via Monte Misone 11/d, 38066 Riva del Garda, Trento, Italy;1. Mechanical Engineering Department, Dumlupinar University, 43270 Kutahya, Turkey;2. Black Carbon Metrology, Measurement Science and Standards, National Research Council, Ottawa, Ontario, Canada K1A 0R6;1. Radiological & Environmental Safety Division, Safety Quality & Resource Management Group, Indira Gandhi Centre for Atomic Research, Kalpakkam, 603102, India;2. Homi Bhabha National Institute, Training School Complex, Anushaktinagar, Mumbai, 400094, India;3. Environmental Assessment Division, Safety Quality & Resource Management Group, Indira Gandhi Centre for Atomic Research, Kalpakkam, 603102, India;1. Department of Chemical Engineering and Material Science, College of Engineering, Michigan State University, East Lansing, MI 48824, USA;2. Department of Microbiology and Molecular Genetics, Michigan State University, East Lansing, MI 48824, USA |
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| Abstract: | The viability of pollen is affected by environmental pollution and its use as a bio-indicator is proposed. Such effects can be observed and quantified by biological tests. However, a more accurate identification of the agents affecting the viability is required in order to validate the biological assay for environmental monitoring. The chemical analysis of pollen is meant to ascertain the existence of a correlation between its reduced biological functions and the presence of pollutants. Moreover, such biological systems act as accumulators and allow the detection and quantification of species present in the environment at low concentrations. Total reflection X-ray fluorescence analysis (TXRF) has been chosen for the investigation due to its high sensitivity, multielement capability and wide dynamic range. Corylus avellana L. (hazel) pollen has been collected in areas with different anthropic impact in the province of Trento, Italy. For the TXRF measurements, a liquid sample is needed, especially if a quantitative analysis is required. In the present work, the analysis after a microwave digestion has been compared with the analysis of a suspension of the pollen samples. In both cases, an internal standard has been used for the quantification. The concentrations of 17 elements ranging from Al to Pb have been determined in 13 samples. Analysis of the suspensions showed to be comparable to that of digested samples in terms of spectral quality, but the latter preparation method gave better reproducibility. Sub-ppm lowest limits of detection were obtained for iron and heavier elements detected. |
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