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Specific Gravity of Blood and Plasma at 4 and 37 °C

Trudnowski, Raymond J, Rico, Rodolfo C·1974·Clinical Chemistry

Abstract

The specific gravity (relative density) of human whole blood and plasma from 25 healthy volunteers was determined gravimetrically. For whole blood it was found to be 1.0621 (95% confidence interval: 1.0652-1.0590) at 4 °C and 1.0506 (95% confidence interval: 1.0537-1.0475) at 37 °C. Plasma specific gravity was 1.0310 (95% confidence interval: 1.0324-1.0296) at 4 °C and 1.0205 (95% confidence interval: 1.0216-1.0193) at 37 °C. All of these values are referred to the density of water at 4 °C. We show the relationship between these values and those given in the literature for measurements at 25 °C. There was a small increase in whole blood specific gravity with increasing hematocrit, but it was not statistically significant over the 40-56 hematocrit range studied.

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Metadata

Authors
Trudnowski, R. J., & Rico, R. C.
Venue
Clinical Chemistry
Published
1974-05-01
Volume
20
Issue
5
Pages
615-616
ISSN
  • 0009-9147 (ISSN-L)
  • 1530-8561
OpenAlex
W2151210692
Cited by
207
References
0
FWCI
0.00
Type
journal article
Language
en
Open access
closed

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CoChat. (2026). Citation check: Specific Gravity of Blood and Plasma at 4 and 37 °C. https://app.cochat.ai/papers/10.1093/clinchem/20.5.615
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Trudnowski, R. J., & Rico, R. C. (1974). Specific Gravity of Blood and Plasma at 4 and 37 °C. Clinical Chemistry. https://doi.org/10.1093/clinchem/20.5.615

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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).

Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.