An improved method for water vapor detection
| Autor: | M. A. Steinmetz, D. M. Baldwin, Thomas Adams, D. B. Manner, S. R. Heisey |
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| Rok vydání: | 1983 |
| Předmět: |
Correlation coefficient
Chemistry Biomedical Engineering Analytical chemistry Evaporation Water Thermal Conductivity Electronics Medical Sweat Glands Display device Thermal conductivity Body Water Skin Physiological Phenomena Calibration Measuring instrument Animals Humans Volatilization Water vapor Voltage |
| Zdroj: | Annals of Biomedical Engineering. 11:117-129 |
| ISSN: | 1573-9686 0090-6964 |
| DOI: | 10.1007/bf02367495 |
| Popis: | We describe improvements in and details for the construction, calibration and use of a device using a thermal conductivity cell for the measurement of low-level rates of water evaporation (E) from a small surface area. E is measured from 0.0 to 1.0 mg . min-1 with a correlation coefficient of 0.999 between measured and independently verified rates and amounts of water evaporation. Data are available as a recordable analog d.c. voltage as well as in digital display for E and for the amount of water evaporated during an operator defined time period. The device we describe is noninvasive and it is designed to be constructed of conventional components. It is useful not only for measuring transcutaneous water diffusion in normal and diseased skin, but also it is adequately sensitive and rapidly responding to follow thermoregulatory and psychogenic sweating in small (nom. 1.0 cm2) skin areas. It can also be used to measure accurately and precisely the rates at which water is adsorbed by and removed from inanimate materials, as well as to determine how much water they store. |
| Databáze: | OpenAIRE |
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