Phytochemistry: Methods for the Study of Inorganic Species in Plant Tissues

Farago, M. E.

doi:10.1002/9783527615919.ch10

Cited by 2 publications

(1 citation statement)

References 76 publications

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“…Detection limits vary for different elements and with the type of material being analysed. As a rough guide, for ‘thick’ biological samples (for which the electron penetration depth is substantial) in SEM–EPMA systems, detection limits are generally around 0.1% ( Farago, 1994).…”

Section: Introductionmentioning

confidence: 99%

Application of X‐ray element mapping across the lichen–rock interface

Williamson

McLean

Purvis

1998

Journal of Microscopy

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The application of element mapping in the scanning electron microscope with electron probe microanalysis across the lichen-rock interface is described with reference to Trapelia involuta growing on a granite substratum. The preparation of samples containing both organic and mineral components required the development of specialized techniques to maintain both chemical and structural integrity at the 2 mm resolution of the X-ray element maps. X-ray element maps show the distribution of entrained rock particles at the lichen-rock interface and chemical localization which is strongly related to anatomical structure for the essential elements S, Fe, Ca, Na, K and P. The ability to map element distribution across the lichenrock interface has wide-ranging potential applications in studies such as the biodeterioration of buildings and monuments and the mobilization and uptake of toxic elements from contaminated substrata. Fig. 4. X-ray element maps for K and P for a single apothecium from a second sample of T. involuta which was collected from a mine site in Cornwall to demonstrate the fine detail of element localization which can be resolved by X-ray element mapping. Abbreviations as in Fig. 1.

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Section: Introductionmentioning

confidence: 99%

Application of X‐ray element mapping across the lichen–rock interface

Williamson

McLean

Purvis

1998

Journal of Microscopy

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Evaluation of different extractants for copper, manganese and zinc in medicinal plants

Andrade

Campos

Pérez

2007

Chemical Speciation & Bioavailability

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The extraction of copper, manganese and zinc by different organic solvents and aqueous solutions from powdered and droughts of nine medicinal plants were investigated as a possible way of accomplishing the speciation of these metals in such samples. The extractants were 75 g L À1 HCl, 50 g L À1 NaCl, 50 g L À1 NaOH, 50 g L À1 Na 2 CO 3 , (1 : 1) glicero-alkali solution, pure water, ethanol and ether. None of the organic solvents extracted significant amounts of the three elements. For Cu, only the HCl solution has shown significant extraction efficiency. On average, Zn was more efficiently extracted when H 2 O, NaOH, and Na 2 CO 3 solutions were used while Mn was more efficiently extracted with the HCl and NaCl solutions. The differentiated extraction behavior of the studied elements in relation to the different aqueous extractants is an indicative of different pools of these elements in the plant substrate.

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Phytochemistry: Methods for the Study of Inorganic Species in Plant Tissues

Cited by 2 publications

References 76 publications

Application of X‐ray element mapping across the lichen–rock interface

Application of X‐ray element mapping across the lichen–rock interface

Evaluation of different extractants for copper, manganese and zinc in medicinal plants

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