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WHD Microanalysis
Consultants Ltd |
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Limitations
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Limitations High Vacuum: the SEM operates at a high vacuum and is therefore unsuitable for the examination of materials with a liquid component without suitable preparation involving drying. Biological samples: animal or vegetable material may be a problem due to the water content and delicate cell structure, unless it has been dead for a few million years. Some other materials, wood and bone for example, may not present any difficulty if dry. The SEM has made great contributions to the study of biological materials but this is a specialised field normally requiring specimen preparation techniques we do not offer. Clients who are able to prepare their own specimens are welcome to use our SEM to examine them. Specialist Interpretation in other fields: we cannot offer expert interpretation (beyond what might be termed 'general science') of results from materials outside our own areas of expertise; in these cases, our role is restricted to reporting what we find in the material submitted. Often, our clients are experts in their materials and require from us the basic information which SEM as a technique is uniquely able to supply in order to make their own interpretations. We can, of course, obtain a specialist's opinion on the SEM results obtained if required. |
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