Skip to main content
Research article - Peer-reviewed, 2012

Revisiting herbage sample collection and preparation procedures to minimise risks of trace element contamination

Dahlin, Sigrun; Edwards, Anthony C; Lindström, Bodil; Ramezanian Bajgiran, Atefeh; Shand, Charles; Walker, R; Watson, Christine A; Öborn, Ingrid

Abstract

A renewed interest in trace elements (TE), as micronutrients as well as potentially toxic elements, and new options for multi-element analysis has led to an increased number of scientists engaging in TE studies. Accreditation, certification and quality control of TE analyses often applies only to the last step in the sample chain when prepared samples are sent to the laboratory for digestion/extraction and subsequent analysis. However, all stages of the chain from initial sampling to final analysis require an understanding of the specific challenges involved in TE studies and an awareness of the contamination risks as well as approaches to limit these. Contamination can potentially be introduced during all stages of handling and preparation of plant samples, e.g. through dust and the materials that make up the different work surfaces, tools and containers used. Milling devices originally used during preparation of two sets of archived herbage samples were tested to indicate the degree of contamination that can arise from milling. For example, some of the milling devices tested showed effects on several TE concentrations while also increasing the variability between samples. A titanium knife mill which was included for comparison gave the best results, showing no measurable contamination by TE of primary interest, while it allowed a high throughput of samples. To enhance the quality of data on TE in bulky plant material such as herbage and to ensure future usability of newly archived samples, we suggest that field handbooks and sample preparation protocols (where needed) are revised to include precautions against TE contamination in all handling steps. This will ensure reliable data on concentrations of micronutrients and potential toxic TE in plant material. (C) 2012 Elsevier B.V. All rights reserved.

Keywords

Micronutrient; Plant sample; Sample drying; Sample milling; Sample storage

Published in

European Journal of Agronomy
2012, volume: 43, pages: 33-39
Publisher: ELSEVIER SCIENCE BV PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS

Authors' information

Swedish University of Agricultural Sciences, Department of Soil and Environment
Edwards, Anthony C
Swedish University of Agricultural Sciences, Department of Crop Production Ecology
Ramezanian Bajgiran, Atefeh
Swedish University of Agricultural Sciences, Department of Crop Production Ecology
Shand, Charles
Walker, R
Watson, Christine A
Swedish University of Agricultural Sciences, Department of Crop Production Ecology

UKÄ Subject classification

Agricultural Science

Publication Identifiers

DOI: https://doi.org/10.1016/j.eja.2012.04.007

URI (permanent link to this page)

https://res.slu.se/id/publ/38800