METHOD FOR DETERMINING THE SALINITY OF FLUID INCLUSIONS Russian patent published in 2022 - IPC G01N21/65 

FIELD: analytical chemistry.

SUBSTANCE: invention relates to the field of analytical chemistry, namely to a method for analyzing the components of solutes, salinity in the H₂O – NaCl system, and can be used in geology, experimental mineralogy and materials science. A method for determining the salinity of fluid inclusions in transparent minerals and synthetic materials with a spatial resolution at the level of units of micrometers includes obtaining at room temperature Raman spectra in the range of values of the relative wavenumber 2800-4000 cm^-1 from fluid inclusions in the sample and from calibration solutions with a variable mass fraction of NaCl, calculating the values of the Skew asymmetry parameter of the specified fragment spectrum by ratio:

,

where N is the number of points of the Raman spectrum; α_i is the intensity; is mathematical expectation of the intensity of the spectrum; Sd is standard deviation, determination of the salinity of fluid inclusions by the calibration dependence for the parameter of asymmetry of calibration solutions as a function of their salinity.

EFFECT: expansion of the arsenal of technical means, reducing the complexity of determining the salinity of fluid inclusions with a locality of up to units of micrometers, simplifying the processing of experimental data, ensuring the safety of inclusions in the volume of material after analysis.

1 cl, 4 dwg, 1 tbl