Skip to main content
. 2010 Oct 4;398(7):3115–3125. doi: 10.1007/s00216-010-4231-5

Table 1.

Average Zn isotope compositions determined for London Zn and the Zn double spike

Solution Number 64Zn/67Zn 66Zn/67Zn 68Zn/67Zn
JMC London Zna 175 12.161276 (1400) 6.871420 (750) 4.554100 (490)
64Zn–67Zn DSb 31 2.505641 (7200) 0.056089 (5300) 0.060645 (3500)

The uncertainties given in parentheses denote two standard deviations and they apply to the least significant digits. n = number of measurements

aThe isotopic data for the London Zn solution were obtained over a period of 6 months by internal normalization relative to 66Zn/64Zn = 0.565023 with the exponential law

bThe isotope data for the Zn DS were acquired during four measurement sessions over a period of 6 months by empirically optimized external normalizations relative to admixed Cu (see text for details)