Accurate and precise zinc isotope ratio measurements in urban aerosols
Gioia, Simone ; Weiss, Dominik ; Coles, Barry ; Arnold, Tim LU
and Babinski, Marly
(2008)
In Analytical Chemistry
80(24).
p.9776-9780
- Abstract
We developed an analytical method and constrained procedural boundary conditions that enable accurate and precise Zn isotope ratio measurements in urban aerosols. We also demonstrate the potential of this new isotope system for air pollutant source tracing. The procedural blank is around 5 ng and significantly lower than published methods due to a tailored ion chromatographic separation. Accurate mass bias correction using external correction with Cu is limited to Zn sample content of approximately 50 ng due to the combined effect of blank contribution of Cu and Zn from the ion exchange procedure and the need to maintain a Cu/Zn ratio of approximately 1. Mass bias is corrected for by applying the common analyte internal standardization... (More)
We developed an analytical method and constrained procedural boundary conditions that enable accurate and precise Zn isotope ratio measurements in urban aerosols. We also demonstrate the potential of this new isotope system for air pollutant source tracing. The procedural blank is around 5 ng and significantly lower than published methods due to a tailored ion chromatographic separation. Accurate mass bias correction using external correction with Cu is limited to Zn sample content of approximately 50 ng due to the combined effect of blank contribution of Cu and Zn from the ion exchange procedure and the need to maintain a Cu/Zn ratio of approximately 1. Mass bias is corrected for by applying the common analyte internal standardization method approach. Comparison with other mass bias correction methods demonstrates the accuracy of the method. The average precision of δ66Zn determinations in aerosols is around 0.05‰ per atomic mass unit. The method was tested on aerosols collected in São Paulo City, Brazil. The measurements reveal significant variations in δ66ZnImperial ranging between -0.96 and -0.37‰ in coarse and between -1.04 and 0.02‰ in fine particular matter. This variability suggests that Zn isotopic compositions distinguish atmospheric sources. The isotopic light signature suggests traffic as the main source. We present further δ66ZnImperial data for the standard reference material NIST SRM 2783 (δ 66ZnImperial) 0.26 (0.10‰).
(Less)
- author
- Gioia, Simone
; Weiss, Dominik
; Coles, Barry
; Arnold, Tim
LU
and Babinski, Marly
- publishing date
- 2008-12-15
- type
- Contribution to journal
- publication status
- published
- in
- Analytical Chemistry
- volume
- 80
- issue
- 24
- pages
- 5 pages
- publisher
- The American Chemical Society (ACS)
- external identifiers
-
- scopus:58149110811
- ISSN
- 0003-2700
- DOI
- 10.1021/ac8019587
- language
- English
- LU publication?
- no
- id
- ea991bbc-5889-47f3-ae0b-a2007b9d9712
- date added to LUP
- 2024-10-24 18:40:11
- date last changed
- 2025-02-28 06:20:49
@article{ea991bbc-5889-47f3-ae0b-a2007b9d9712,
abstract = {{<p>We developed an analytical method and constrained procedural boundary conditions that enable accurate and precise Zn isotope ratio measurements in urban aerosols. We also demonstrate the potential of this new isotope system for air pollutant source tracing. The procedural blank is around 5 ng and significantly lower than published methods due to a tailored ion chromatographic separation. Accurate mass bias correction using external correction with Cu is limited to Zn sample content of approximately 50 ng due to the combined effect of blank contribution of Cu and Zn from the ion exchange procedure and the need to maintain a Cu/Zn ratio of approximately 1. Mass bias is corrected for by applying the common analyte internal standardization method approach. Comparison with other mass bias correction methods demonstrates the accuracy of the method. The average precision of δ<sup>66</sup>Zn determinations in aerosols is around 0.05‰ per atomic mass unit. The method was tested on aerosols collected in São Paulo City, Brazil. The measurements reveal significant variations in δ<sup>66</sup>Zn<sub>Imperial</sub> ranging between -0.96 and -0.37‰ in coarse and between -1.04 and 0.02‰ in fine particular matter. This variability suggests that Zn isotopic compositions distinguish atmospheric sources. The isotopic light signature suggests traffic as the main source. We present further δ<sup>66</sup>Zn<sub>Imperial</sub> data for the standard reference material NIST SRM 2783 (δ <sup>66</sup>Zn<sub>Imperial</sub>) 0.26 (0.10‰).</p>}},
author = {{Gioia, Simone and Weiss, Dominik and Coles, Barry and Arnold, Tim and Babinski, Marly}},
issn = {{0003-2700}},
language = {{eng}},
month = {{12}},
number = {{24}},
pages = {{9776--9780}},
publisher = {{The American Chemical Society (ACS)}},
series = {{Analytical Chemistry}},
title = {{Accurate and precise zinc isotope ratio measurements in urban aerosols}},
url = {{http://dx.doi.org/10.1021/ac8019587}},
doi = {{10.1021/ac8019587}},
volume = {{80}},
year = {{2008}},
}