METHOD FOR MEASURING WATER IN COMPLEX COMPOUNDS Russian patent published in 2015 - IPC G01N31/16 G01N25/56 

FIELD: chemistry.

SUBSTANCE: invention refers to the quantitative and qualitative measurement of water as shown by an inner sphere of complex compounds (CCs) and can find application in coordination chemistry and pharmacy. What is presented is a method for measuring water in the solid CC, wherein water molecules in the inner sphere of the solid CC are identified by a sample dehydration temperature of 150-165°C on thermal curves - thermograms drawn within the temperature range of 20-1,000°C at a sample heating rate of 10 degrees/min, as well as by hydroxocomplex formation as a result of the alkalimetric titration of the CC solutions pre-dehydrated at a temperature of 120°C for 8 hours by detecting an endpoint respective to pH within the range of 4.87-4.95 on the differential titration curve; further, the quantitative content of water in the inner sphere of the solid CC is determined for the solid CC samples dehydrated by drying up at a temperature of 120°C for 8 hours as shown by specific areas of the thermogravigrams in the graphic system "Quantity of Removed Water, mmole - Dehydratation Temperature, °C".

EFFECT: achieving the higher information value and reliability, as well as simplifying the analysis.

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