Closed capillary method for tracer diffusion measurements in liquids

Pentti Passiniemi, Simo Liukkonen, Z. Noszticzius

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

A continuous closed capillary method is described in which the lower half of the capillary is filled at the beginning of the experiment with radioactive solution and the upper half with inactive solution. Measurement of any change in the activity is based on the position dependent counting efficiency of the nuclear detector system. It has been shown that convection disturbances arising in the filling process present no difficulties to use of this method. The tracer diffusion coefficient of 22NaCl has been determined in 0.1 and 1.44 mol dm-3 aqueous sodium chloride solutions at 298.15 K. The results agree with the corresponding open-ended capillary and diaphragm-cell values of other authors. An average precision of 0.4% was attained in the measurements. The systematic errors of the open-ended capillary method, the ΔL-effect and the immersion effect, are eliminated in closed capillaries. Also, in contrast to the two other methods, no calibration is required.

Original languageEnglish
Pages (from-to)1834-1839
Number of pages6
JournalJournal of the Chemical Society, Faraday Transactions 1: Physical chemistry in Condensed Phases
Volume73
DOIs
Publication statusPublished - 1977

Fingerprint

tracers
Liquids
liquids
Systematic errors
Diaphragms
Sodium Chloride
Calibration
Detectors
diaphragms
sodium chlorides
systematic errors
submerging
counting
convection
disturbances
diffusion coefficient
Experiments
detectors
cells
Convection

ASJC Scopus subject areas

  • Chemistry(all)

Cite this

Closed capillary method for tracer diffusion measurements in liquids. / Passiniemi, Pentti; Liukkonen, Simo; Noszticzius, Z.

In: Journal of the Chemical Society, Faraday Transactions 1: Physical chemistry in Condensed Phases, Vol. 73, 1977, p. 1834-1839.

Research output: Contribution to journalArticle

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