Sr isotope and trace elements analysis as a potential tool for determining the geographical origin of paprika

Hidehisa Tsuchida, Akimasa Nakano, Izumi Nakai

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

Sr isotope ratio and trace elements (Al, Ti, Mn, Fe, Ni, Cu, Zn, Rb, Sr) of 52 paprika samples (from Japan, Korea, New Zealand and Netherlands) were measured using inductively coupled plasma mass spectrometers of the double-focusing type and the quadrupole type, respectively. The relative standard deviation of the strontium isotope ratio (87Sr/86Sr) for a NIST SRM 987 standard was as small as 0.033% by optimizing the measurement conditions of the device. The obtained data were statistically evaluated so as to investigate whether there was a significant difference between domestic and foreign products cultivated by nourishing solutions. Although domestic products were limited to two cultivated areas, a linear discriminant analysis (LDA) model allowed the discrimination of domestic and foreign products with high (domestic products) accuracy. Consequently, the present study has demonstrated that the production place of paprika cultivated by a nourishing solution can be estimated by the 87Sr/86Sr isotope ratio and the Sr concentrations.

Original languageEnglish
Pages (from-to)625-628
Number of pages4
JournalBUNSEKI KAGAKU
Volume63
Issue number7
DOIs
Publication statusPublished - 2014
Externally publishedYes

Keywords

  • Double-focusing ICP-MS
  • Paprika
  • Strontium isotope ratio
  • Trace elements

ASJC Scopus subject areas

  • Analytical Chemistry

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