Letter | Published:

Rapid Determination of D2O Content in Water using a Vapour Pressure Osmometer

Subjects

Abstract

I HAVE carried out determinations of D2O content in water using the vapour pressure osmometer ‘Mechrolab, Model 301 A’, designed to perform molecular-weight determinations. Briefly, the principle of this instrument is as follows1,2: two thermistors, charged with a drop of solvent and arranged in a d.c. Wheatstone bridge, are at the same temperature in an ambient atmosphere saturated with the vapour of the selected solvent. The bridge is equilibrated, and a drop of a solution of the same solvent is placed on one of the two thermistors (called the sample thermistor). Solvent condenses on this drop of solution until vapour pressure equilibrium is approached, and the temperature of the thermistor increases. Its resistance variation depends on the concentration of the solution and it is determined by rebalancing the bridge.

Access optionsAccess options

Rent or Buy article

Get time limited or full article access on ReadCube.

from$8.99

All prices are NET prices.

References

  1. 1

    Neumayer, I. J., Anal. Chim. Acta, 20, 519 (1959).

  2. 2

    Wilson, A., Bini, L., and Hofstader, R., Anal. Chem., 33, 135 (1961).

  3. 3

    Kirschenbaum, I., Physical Properties and Analysis of Heavy Water (McGraw-Hill, New York, 1951).

Download references

Author information

Rights and permissions

To obtain permission to re-use content from this article visit RightsLink.

About this article

Publication history

  • Issue Date

DOI

https://doi.org/10.1038/204875a0

Comments

By submitting a comment you agree to abide by our Terms and Community Guidelines. If you find something abusive or that does not comply with our terms or guidelines please flag it as inappropriate.