Identification of atmospheric particulate matter derived from coal and biomass burning and from non-exhaust traffic emissions using zinc isotope signatures

High‐precision zinc isotope measurement of chemically different geostandards by multicollector inductively coupled plasma mass spectrometry

“…This result is in good agreement with most of previously published values (Figure 6). 3,22,26–30,32,35,52,53,62,66,67 The average δ 66 Zn Lyon of andesite AGV‐2 is 0.30 ± 0.03‰ (2SD, n = 14), which is identical to most of the published values within uncertainties 28,30–32,53,62 . The peridotite standard JP‐1 has an average δ 66 Zn Lyon of 0.19 ± 0.04‰ (2SD, n = 11), which is in agreement with the values of 0.22 ± 0.04‰ and 0.15 ± 0.2‰ reported by previous studies 3,68 .…”

“…Recently, the tiny (~0.1‰) variation of δ 66 Zn among MORB samples has been attributed to isotope fractionation during basaltic magma differentiation 25 . However, the published Zn isotope data for some commercially accessible geological rock standards yield significant interlaboratory offsets, for instance the reported δ 66 Zn Lyon values for the basalt geostandard BHVO‐2 vary from 0.20‰ to 0.48‰ among different laboratories, 3,26–28 the reported δ 66 Zn Lyon values for the andesite geostandards AGV‐1 and AGV‐2 vary from 0.22‰ to 0.50‰, 28–31 and for the basalt geostandard BCR‐2 the reported δ 66 Zn Lyon varies from 0.20‰ to 0.33‰ 26,28,32 . Some of these offsets even extend the isotopic variations observed in many high‐temperature geological processes as quoted above.…”