mahynski/slovenian-site-asparagus

Summary

This dataset is composed of stable isotope and trace element (SITE) levels measured in asparagus from Slovenia and neighboring countries. The details of collection and measurement may be found in this paper. The goal of these measurements is build authentication models to verify the geographic provenance of samples.

This data was originally provided by Dr. Lidija Strojnik and Prof. Nives Ogrinc from the Department of Environmental Sciences, Jožef Stefan Institute, Ljubljana 1000, Slovenia.

Details

Units for all SITE features are reported in lod.csv along with the limits of detection (LOD) for the instrument used to measure these levels in a given year.

Measurements of the stable isotope ratios of light elements are expressed in the δ-notation in ‰ according to the equation: δiE = (R(iE/jE)sample / R(iE/jE)standard) – 1, where i stands for the highest and j for the lowest atomic mass number of the element E (C, N, O, S), and R is the isotope ratio between the heavier and the lighter isotope of the element (13C/12C, 15N/14N, 18O/16O, 34S/32S) in the sample or standard. The δ13C values are expressed relative to V-PDB (Vienna-Pee Dee Belemnite) standard, δ15N values relative to AIR, δ34S values relative to V-CDT (Vienna-Canyon Diablo Troilite) standard and the δ18O values relative to the VSMOW (Vienna-Standard Mean Ocean Water) standard.

Acknowledgements

The Slovenian Forestry and Food, Administration for Food Safety, Veterinary Sector and Plant Protection under GA no. C2337-18–000044, C2337-19–000033, C2337-20–000048, C2337-21-000062 and C2337-22-000066 are gratefully acknowledged. Financial support was also provided from the Slovenian Research and Innovation Agency by P1-0143 and the IAEA project “Authenticity of High-Quality Slovenian Food Products Using Advanced Analytical Techniques” (Contract No. 23362).

Certain equipment, instruments, software, or materials, commercial or non-commercial, are identified in this paper to specify the experimental procedure adequately. Such identification is not intended to imply recommendation or endorsement of any product or service by NIST, nor is it intended to imply that the materials or equipment identified are necessarily the best available for the purpose. Contribution of the National Institute of Standards and Technology, not subject to US Copyright.