Evaluation of the Stability of Solutions of Low Electrolytic Conductivity by Primary Measurements

Fraga, Isabel Cristina Serta; Lopes, J C; Cordeiro, Lidiane Rodrigues; Silva, Leonardo Firmino da; Borges, Paulo Paschoal

doi:10.1007/s10953-015-0384-3

Cited by 5 publications

(2 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Several designs of such cells are known, which are used as primary ones. The most popular among national metrology institutes (NMIs) are Jones-type cells with a removable central extension tube [1][2][3][4][5][6][7] and cells with a moving electrode [6][7][8][9][10]. Regardless of the cell design, the method for measuring EC remains the same.…”

Section: Introductionmentioning

confidence: 99%

“…The method is implemented by measuring the difference in resistance between two liquid columns of the same diameter but different lengths. Thus, the basis of a cell of any design [1][2][3][4][5][6][7][8][9][10] is always the electrical resistance of a virtual liquid column with a known geometry, which ultimately determines the cell constant. For an idealized model (figure 1), the constant can be easily calculated by its geometric parameters L (m) and D (m), but the question arises of how to fill such a cell with liquid.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Resistance bias estimation of a liquid column in a cylindrical conductivity cell with lateral liquid supply

Stennik,

Mikhal

2024

Eng. Res. Express

View full text Add to dashboard Cite

The article shows an idealized model of a cylindrical two-electrode conductivity cell with inletand outlet holes for filling located perpendicular to the cell axis. Based on the finite elementmethod (FEM), the non-uniformity of the current density distribution inside the cell wasdetermined. For a range of geometrical parameters of the cell, the resistance biases of the liquidcolumn with respect to the idealized model—a cell with a uniform current density distribution(without holes) are calculated. A mathematical expression is given that describes calculatingthe electrolytic conductivity value using the geometrical parameters of a conductivity cell,taking into account the field distortion caused by holes for filling. It has also been found that atthe ratio of the cell diameter to the hole diameter D/d ≥ 5, the entire field distortion inside thecell is provided by a liquid column in the holes with a length of only (h ≤ d) mm. Theoreticalestimates and mathematical models highlighted in this article were used in the creation of theprimary differential conductivity cell. Structurally, such a cell consists of two tubes of the samediameter but of different lengths, at the edges of which platinized electrodes are placed.

show abstract