Potential of Multi-Element Isotopic Approach for Geographical Origin Discrimination of Tea

• Abstract:

  The determination of strontium and lead isotope abundance ratios by MC-ICP-MS (multicollection inductively coupled plasma mass spectrometry) has been applied to 28 authentic teas from various origin. A noticeably different value of 87Sr/86Sr has been obtained for Japanese tea. A distinctive trend of Pb-isotope ratios has been observed for the different geographic regions of sample origin. The combination of isotopic and elemental concentrations tremendously increases the discrimination possibilities compared to a single isotopic or elemental system.
• Keywords:

  geographic origin, food authenticity, strontium isotopes, lead isotopes, MC-ICP-MS
• Download:

  IMEKO-TC23-2016-024.pdf
• DOI:

  _unreg_tc23-2016.024

Event details: