Analysis of solid state calorimetric data using non-iterative strategies

Abstract

The elemental profi le of St John’s Wort was collected for a raw plant (SJW herb) and 6 processed forms (SJW A – F). A total of 27 elements were monitored including the toxic elements As, Cd, Hg and Pb as well as essential elements Ca, Mg, Cu and Zn. The level of As, Hg or Pb for all 7 samples were below detection limits. The raw plant and SJW sample C contained 0.86 ± 0.01 μg/g and 0.22 ± 0.02 μg/g of Cd. All samples showed > 20 μg/g of Al, Ca, Fe, Mg and Zn; in addition, the herb also had 103.1 ± 0.4 μg/g of Mn.