The certified values delivered by this Standard Reference Material (SRM) are intended for use in validating analytical methods for the determination of major, minor, and trace elements in botanical materials, agricultural food products, and similar materials and for quality assurance when assigning values to in-house control materials.
The material for this SRM is leaves representative of healthy Georgia peach trees, variety “Coronet”, picked from a field in Peach County, GA (150 miles south of Athens, GA). The plant material for this SRM was collected and prepared under the direction of R.A. Isaac, Soil Testing & Plant Analysis Laboratory, The University of Georgia College of Agriculture. Fungicide and insecticide sprays were controlled to minimize heavy metal contamination. The leaves were dried and ground in a stainless-steel mill to pass a 1 mm screen. At NIST, the ground leaves were jet milled and air classified to a particle size of approximately 75 μm (200 mesh). Prior to bottling, the material was irradiated by 60Co to an estimated minimum absorbed dose of 27.8 kGy for microbial control.
keywords: Biological material, plant material , Trace elements, Heavy metals,