Triple point of e-deuterium as an accurate thermometric fixed point

Conference · Wed Jan 01 00:00:00 EST 1986

OSTI ID:5699197

Pavese, F; McConville, G T

The triple point of deuterium (18.7/sup 0/K) is the only possibility for excluding vapor pressure measurements in the definition of a temperature scale based on fixed points between 13.81 and 24.562/sup 0/K. This paper reports an investigation made at the Istituto di Metrologia and Mound Laboratory, using extremely pure deuterium directly sealed at the production plant into small metal cells. The large contamination by HD of commercially available gas, that cannot be accounted and corrected for due to its increase in handling, was found to be very stable with time after sealing in IMGC cells. HD contamination can be limited to less than 100 ppM in Monsanto cells, both with n-D/sub 2/ and e-D/sub 2/, when filled directly from the thermal diffusion column and sealed at the factory. e-D/sub 2/ requires a special deuterated catalyst. The triple point temperature of e-D/sub 2/ has been determined to be: T(NPL-IPTS-68) = 18.7011 +- 0.002/sup 0/K. 20 refs., 3 figs., 2 tabs.

• Research Organization: Monsanto Research Corp., Miamisburg, OH (USA). Mound; Istituto di Metrologia G. Colonnetti, Turin (Italy)
• DOE Contract Number: AC04-76DP00053
• OSTI ID: 5699197
• Report Number(s): MLM-3352-OP; CONF-8604178-1; ON: DE86010412
• Resource Relation: Conference: International conference on temperature measurement in science and industry, Beijing, China, 16 Apr 1986; Other Information: Portions of this document are illegible in microfiche products
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
DEUTERIUM
TRIPLE POINT
EXPERIMENTAL DATA
HYDROGEN DEUTERIDE
IMPURITIES
TEMPERATURE MEASUREMENT
DATA
DEUTERIDES
DEUTERIUM COMPOUNDS
HYDROGEN COMPOUNDS
HYDROGEN ISOTOPES
INFORMATION
ISOTOPES
LIGHT NUCLEI
NUCLEI
NUMERICAL DATA
ODD-ODD NUCLEI
STABLE ISOTOPES
400201* - Chemical & Physicochemical Properties