PROCESS OF EXPRESS QUALITY CHECK OF AROMATIC (ESSENTIAL) OILS AND ESSENCE-BASED PRODUCTS Russian patent published in 2008 - IPC G01N33/03 

FIELD: physics; technological process.

SUBSTANCE: invention involves static "piezoelectronic nose", the matrix of which consists of eight mass-sensitive piezo sensors with sorbent films on electrodes of different polarity, films being made of solutions of two polar, two half-polar, two non-polar chromatographic phases, as well as propolis and trioctylphosphinoxide solutions. After removal of free solvents the films weigh 10-20 mkg. 5-10 cm³ of aromatic oil is selected, thermostated for 5 minutes at the temperature of 20±2°C, 5-10 g or 5-10 cm³ of oil-based products is thermostated for 5 minutes at the temperature of 30±5°C, balanced gas phase of the tested sample is selected and inserted into detection cell, response of each piezo sensor is immediately registered, cumulative signal in the form of time "mass-aromagramm" is compared to the data bank of standard sample analysis results. If identity of cumulative signals reaches 60-80%, the sample is considered low-quality; if identity is over 80%, the tested sample complies with quality standard; if cumulative signal coincides with the template less that for 60%, the tested sample is rejected as non-conforming to the standard.

EFFECT: shorter analysis time; higher portability of detector; simpler measurement processing and decision making stage; higher accuracy, measurement objectivity and reliability of proof of artificial origin of an aromatic oil.

1 tbl, 3 dwg