Determination of pH in highly saline waters

Marcus, Yizhak

doi:10.1351/pac198961061133

Cited by 20 publications

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“…However, in high ionic strength solutions such as the Dead Sea brine, the liquid junction potential of the brine may be considerably different than that of the low ionic strength calibrating buffers. Various approaches were adopted to overcome this problem (e.g., Ben-Yaakov and Sass 1977;Marcus 1989;Knauss et al 1990). These approaches employed either systems of ion selective electrodes (ISE) or different pH scales (e.g., Bates 1974).…”

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confidence: 99%

The determination of pH in hypersaline lakes with a conventional combination glass electrode

Golan¹,

Gavrieli²,

Lazar³

et al. 2014

Limnology & Ocean Methods

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pH in natural waters is commonly measured with a pH glass combination electrode. This method, however, yields accurate results only in low ionic strength solutions whereas its application to high ionic strength solutions "suffers" from bias introduced mainly by liquid junction potential. The determination of pH in high ionic strength solutions was conducted with dual ion selective electrodes systems that are liquid‐junction‐free. In the present work, we provide a method for determining the pH over a very wide range of ionic strengths using a conventional glass pH electrode. The method is based on calibrating the signal of the conventional combination glass electrode against the signal of a liquid‐junction‐free H+|Cl‐ electrode pair. The calibration was conducted on the Dead Sea brine and its dilutions with deionized water. It yielded a pH correction function of ionic strength, ΔpH(I), that allows evaluating the pH of Dead Sea brines and other brines of similar compositions using a regular glass combination pH electrode, over an ionic strength range of ~1‐10 m. A pH measurement of the Dead Sea brine with a conventional combination glass electrode yielded a value of 6.26 ± 0.04 after applying the ΔpH(I) correction function, identical to the 6.27 ± 0.03 value obtained by the liquid‐junction‐free H+|Cl‐ electrode pair.

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confidence: 99%

The determination of pH in hypersaline lakes with a conventional combination glass electrode

Golan¹,

Gavrieli²,

Lazar³

et al. 2014

Limnology & Ocean Methods

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“…Measuring pH correctly in high ionic strength solutions is challenging. 13,20,21 The pH measurements were done with double-junction pH probes, which were resistant to Na + ion interference. The solution pH was continuously monitored during the experiments.…”

Section: Methodsmentioning

confidence: 99%

An Electrochemical Study of the Effect of High Salt Concentration on Uniform Corrosion of Carbon Steel in Aqueous CO₂ Solutions

Sani

Brown

Nešić

2021

J. Electrochem. Soc.

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Uniform C O 2 corrosion of carbon steel facilities is often a major problem when handling produced water in the oil and gas fields. High amounts of dissolved salts are often present in produced water. A limited number of research studies has been conducted on the effect of salt concentration on uniform C O 2 corrosion. In this study, the effect of NaCl concentration on uniform C O 2 corrosion of X65 carbon steel was investigated in C O 2 saturated aqueous solutions using a rotating cylinder system at 30 °C, autogenous pH, and 1 bar total pressure in an NaCl concentration range of 0‒4.27 molality (m) (0‒20 wt.%). With increasing NaCl concentration, the corrosion rate increased sharply and reached its maximum value at ∼0.17 m (1 wt.%) NaCl and then decreased with further increase in NaCl concentration. The observed trend in the corrosion rate with increasing NaCl concentration was primarily a consequence of the change in the cathodic limiting current density, which was the main factor controlling the rate of the overall corrosion process. The additional factor was the change in the rate of the anodic reaction with salt concentration.

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“…For those who wish to get more detailed information on the terminology of pH metry and on the measurement of pH in aqueous and water-organic solutions, physiological fluids, waters, atmosphere precipitations, etc., we give some reference literature [1][2][3][4][5][6][7][8].…”

Section: Iupac Recommendations For Reference Standard Samplesmentioning

confidence: 99%

IUPAC Recommendations for Reference Standard Samples in pH Measurements

2005

J Anal Chem

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Determination of pH in highly saline waters

Abstract: Abstract

Cited by 20 publications

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The determination of pH in hypersaline lakes with a conventional combination glass electrode

The determination of pH in hypersaline lakes with a conventional combination glass electrode

An Electrochemical Study of the Effect of High Salt Concentration on Uniform Corrosion of Carbon Steel in Aqueous CO₂ Solutions

IUPAC Recommendations for Reference Standard Samples in pH Measurements

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Determination of pH in highly saline waters

Abstract: Abstract

Cited by 20 publications

References 0 publications

The determination of pH in hypersaline lakes with a conventional combination glass electrode

The determination of pH in hypersaline lakes with a conventional combination glass electrode

An Electrochemical Study of the Effect of High Salt Concentration on Uniform Corrosion of Carbon Steel in Aqueous CO2 Solutions

IUPAC Recommendations for Reference Standard Samples in pH Measurements

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An Electrochemical Study of the Effect of High Salt Concentration on Uniform Corrosion of Carbon Steel in Aqueous CO₂ Solutions