TY - JOUR
T1 - Laser ablation ICP-MS of size-segregated atmospheric particles collected with a MOUDI cascade impactor
T2 - A proof of concept
AU - Robinson, Marin S.
AU - Grgić, Irena
AU - Šelih, Vid S.
AU - Šala, Martin
AU - Bitsui, Marsha
AU - Van Elteren, Johannes T.
N1 - Publisher Copyright:
Copyright © 2017 by ASME.
PY - 2017/5/16
Y1 - 2017/5/16
N2 - A widely used instrument for collecting size-segregated particles is the micro-orifice uniform deposit impactor (MOUDI). In this work, a 10-stage MOUDI (cut-point diameter of 10μm to 56nm) was used to collect samples in Ljubljana, Slovenia, and Martinska, Croatia. Filters, collected with and without rotation, were cut in half and analyzed for nine elements (As, Cu, Fe, Ni, Mn, Pb, Sb, V, Zn) using laser ablation ICP-MS. Elemental image maps (created with ImageJ) were converted to concentrations using NIST SRM 2783. Statistical analysis of the elemental maps indicated that for submicron particles (stages 6-10), ablating 10% of the filter (0.5cm2, 20min ablation time) was sufficient to give values in good agreement (±10%) to analysis of larger parts of the filter and with good precision (RSE<1%). Excellent sensitivity was also observed (e.g., 20±0.2pgm-3V). The novel use of LA-ICP-MS, together with image mapping, provided a fast and sensitive method for elemental analysis of size-segregated MOUDI filters, particularly for submicron particles.
AB - A widely used instrument for collecting size-segregated particles is the micro-orifice uniform deposit impactor (MOUDI). In this work, a 10-stage MOUDI (cut-point diameter of 10μm to 56nm) was used to collect samples in Ljubljana, Slovenia, and Martinska, Croatia. Filters, collected with and without rotation, were cut in half and analyzed for nine elements (As, Cu, Fe, Ni, Mn, Pb, Sb, V, Zn) using laser ablation ICP-MS. Elemental image maps (created with ImageJ) were converted to concentrations using NIST SRM 2783. Statistical analysis of the elemental maps indicated that for submicron particles (stages 6-10), ablating 10% of the filter (0.5cm2, 20min ablation time) was sufficient to give values in good agreement (±10%) to analysis of larger parts of the filter and with good precision (RSE<1%). Excellent sensitivity was also observed (e.g., 20±0.2pgm-3V). The novel use of LA-ICP-MS, together with image mapping, provided a fast and sensitive method for elemental analysis of size-segregated MOUDI filters, particularly for submicron particles.
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U2 - 10.5194/amt-10-1823-2017
DO - 10.5194/amt-10-1823-2017
M3 - Article
AN - SCOPUS:85019386949
SN - 1867-1381
VL - 10
SP - 1823
EP - 1830
JO - Atmospheric Measurement Techniques
JF - Atmospheric Measurement Techniques
IS - 5
ER -