Artikkelit jotka sisältää sanan 'point frequency method'
Turvelajin mikroskooppisesta määrityksestä.
English title: Two microscopic methods for the determination of peat types.
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Preparation of peat samples, identification of tissues and estimation of constituents are important in microscopic determination of peat type. Two microscopic methods for determining peat type are described: a wet sieving method and a drying, pulverizing and KOH solution method.
The wet sieving method does not involve a tissue-destroying base or acid treatment. In both methods slides are prepared from the peat suspension by pipetting and drying. The tissues are then identified under a microscope and checked by reference to literature and a slide collection. The amount of peat factors is estimated by the point frequency method. The wet sieving method is simpler and gives a higher proportion of better preserved tissues, making tissue identification more reliable.
Key words: peat type, epidermic tissues, wet sieving, point frequency method, microscopy.
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Haihu,
University of Turku, Department of Chemistry, SF-20500 Turku, Finland
Sähköposti:
ei.tietoa@nn.oo
- Etelämäki, Sähköposti: ei.tietoa@nn.oo
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