Small universal E-taster for rapid comparative analysis of liquids

TL;DR

This paper introduces a compact device and method for rapidly analyzing and comparing liquids by capturing their electrical impedance fingerprints as they dry on a quartz sensor, enabling quick quality assessment.

Contribution

It presents a novel, inexpensive, and portable E-taster device and method for liquid fingerprinting based on dynamic electrical impedance measurements.

Findings

Successfully distinguished spirits, wines, and milk solutions.

Provided quantitative measures of liquid differences.

Demonstrated rapid assessment at room temperature and humidity.

Abstract

An original method and a device for obtaining fingerprints of liquids are proposed. According to this method, a fingerprint is a dynamic parameter - an oscillogram of the electrical impedance of a quartz sensor on which a drop of the studied liquid dries. The design of the device and the principle of its operation are described. The method can be used for a quick and inexpensive assessment of the degree of compliance of a liquid with the standard. Moreover, the degree of the difference between liquids of different compositions is expressed quantitatively. The device is a compact console for a laptop. The method is implemented in the range of room temperatures and humidity. The work of the E-taster is demonstrated by comparing the fingerprints of spirits, wines of different types and brands and solutions of milk powder of different concentrations.