Lentfer, C. J., Cotter, M. and Boyd, W. E. (2003). Particle settling times for gravity sedimentation and centrifugation:. J Archaeol Sci 30 (2). Vol 30(2), pp. 149-168.
 Title The title of the publication or report |
Particle settling times for gravity sedimentation and centrifugation: | |||
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Subtitle The sub title of the publication or report |
a practical guide for palynologists | |||
Issue The name of the volume or issue |
J Archaeol Sci 30 (2) | |||
Series The series the publication or report is included in |
Journal of Archaeological Science | |||
Volume Volume number and part |
30 (2) | |||
Page Start/End The start and end page numbers. |
149 - 168 | |||
Biblio Note This is a Bibliographic record only. |
Please note that this is a bibliographic record only, as originally entered into the BIAB database. The ADS have no files for download, and unfortunately cannot advise further on where to access hard copy or digital versions. | |||
Publication Type The type of publication - report, monograph, journal article or chapter from a book |
Journal | |||
Abstract The abstract describing the content of the publication or report |
Palynological analyses are becoming increasingly integrated into archaeological studies. Central to the preparation of samples is the use of centrifugation or still settling to remove sediment components and/or separate the palynomorphs. However, although there are many standard recipes describing palynological preparation, there appears to be no discussion of optimal centrifugation times and speeds or settling times. Since centrifugation may take up as much as 20--40% of preparation time, it is reasonable to consider potential reduction of this time; this may be achieved by reducing centrifuge time. This note discusses the theoretical bases for selecting settling times and centrifugation times and speeds, and provides indication of optimal values for the removal of particles of different sizes, especially those in the clay-sized range, in media of various viscosities. By returning to first principles, it appears that typical centrifugation times provided in recipes are conservative, and that considerable savings in time may be made by more judicious use of the centrifuge. Tables of values are provided as example, indicating order of magnitude of timing required. | |||
Year of Publication The year the book, article or report was published |
2003 | |||
Locations Any locations covered by the publication or report. This is not the place the book or report was published. |
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Source Where the record has come from or which dataset it was orginally included in. |
BIAB
(The British & Irish Archaeological Bibliography (BIAB))
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Created Date The date the record of the pubication was first entered |
08 Aug 2003 |
