TY - JOUR A1 - Rosner, Martin A1 - Pritzkow, Wolfgang A1 - Vogl, Jochen A1 - Voerkelius, S. T1 - Development and validation of a method to determine the boron isotopic composition of crop plants T2 - Analytical chemistry N2 - We present a comprehensive chemical and mass spectrometric method to determine boron isotopic compositions of plant tissue. The method including dry ashing, a three-step ion chromatographic boron–matrix separation, and 11B/10B isotope ratio determinations using the Cs2BO2+ graphite technique has been validated using certified reference and quality control materials. The developed method is capable to determine δ11B values in plant tissue down to boron concentrations of 1 mg/kg with an expanded uncertainty of ≤1.7‰ (k = 2). The determined δ11B values reveal an enormous isotopic range of boron in plant tissues covering three-quarters of the natural terrestrial occurring variation in the boron isotopic composition. As the local environment and anthropogenic activity mainly control the boron intake of plants, the boron isotopic composition of plants can be used for food provenance studies. PB - American Chemical Society CY - Washington, DC KW - Boron isotope variations KW - Delta-scale KW - Stable isotopes KW - Isotope reference materials KW - Provenance KW - Authenticity PY - 2011 UR - https://opus4.kobv.de/opus4-bam/frontdoor/index/index/docId/23495 AN - OPUS4-23495 SN - 0003-2700 SN - 1520-6882 VL - 83 IS - 7 SP - 2562 EP - 2568 AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany