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Analysis of leaves by using the laser ICP-MS with isotope dissolution method
H Scholze1, E Hoffmann, C Lüdke
1Laboratorium für spektroskopische Methoden der Umweltanalytik, Intitut für Spektrochemie und angewandte Spektroskopie, Gebäude 11.1, Rudower Chaussee 5, D-12489, Berlin, Germany.
Analytical and Bioanalytical Chemistry
|July 1, 1996
Summary
This study details a new method using laser ablation inductively coupled mass spectrometry (laser ICP-MS) to measure trace elements in birch leaves and ashes. The technique offers precise and accurate results for environmental analysis.
Area of Science:
- Environmental Science
- Analytical Chemistry
- Geochemistry
Background:
- Accurate determination of trace elements in biological samples like birch leaves is crucial for environmental monitoring.
- Traditional methods involving sample digestion can be time-consuming and may introduce contamination.
- Developing direct solid-sampling techniques for elemental analysis is an ongoing area of research.
Purpose of the Study:
- To describe and validate a method for trace element determination in birch leaves and ashes using laser ablation inductively coupled mass spectrometry (laser ICP-MS).
- To assess the precision, accuracy, and detection limits of the laser ICP-MS method.
- To compare the results obtained from direct solid analysis with those from traditional solution-based ICP-MS analysis.
Main Methods:
- Samples of birch leaves and their ashes were prepared into pellets without binders.
- Direct analysis of solid samples was performed using laser ICP-MS (ELAN 5000 with laser sampler type 320).
- A calibration procedure involving enriched isotopes was employed.
- Results were compared to those obtained after sample digestion and subsequent solution ICP-MS analysis.
Main Results:
- The laser ICP-MS method, combined with isotope dilution calibration, provided quantitative data for trace elements in birch leaves and ashes.
- The method demonstrated good precision and accuracy when compared to conventional digestion-ICP-MS techniques.
- Detection limits were established for various trace elements, indicating the method's sensitivity.
Conclusions:
- Laser ablation ICP-MS offers a viable and efficient alternative to traditional digestion methods for trace element analysis in complex biological matrices.
- The developed method is suitable for routine environmental monitoring and research requiring direct solid sample analysis.
- Further optimization could enhance the applicability of laser ICP-MS for a wider range of elements and sample types.