| 摘要 |
A method for using stable isotope profiling and optionally trace element profiling to differentiate the origin of commodities, such as pistachios (Pistachia vera), or salmon, is disclosed. Isotope ratios can be determined using any suitable method, such as stable isotope mass spectrometer. Geographic regions were well separated based on isotope ratios. Seasonal effects were found to affect some isotopes for some regions.
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