Sonoluminescence Spectroscopy for the Analysis of Natural Brine

Abstract

The use of ultrasound (us) for the determination of main component (NaCl) and main admixtures (CaCl₂, MgCl₂) of natural brine was investigated. The NaCl content was determined using us of ultrahigh frequency (10 to 25 MHz with the optimum at 20–22 MHz) and of 20 W·cm⁻² intensity. The admixture concentrations were determined with the simultaneous application of us of ultrahigh (10–25 MHz) and low (18–23 kHz) frequencies at intensities of 20 and 1.3–1.5 W·cm⁻², respectively. This approach reduced the lower determination boundary down to 0.1 g·dm⁻³, i.e., by a factor of 5. An analytical routine of complex determination of sodium chloride and macroimpurities content in brines of different origin was developed using sonoluminescence spectroscopy.

Keywords:

• Calcium chloride
• magnesium chloride
• natural brines
• sodium chloride
• sonoluminescence spectroscopy

Disclosure statement

No potential conflict of interest was reported by the author(s).