Vyhodnocení obsahu tuku a cukru v mléce elektrickou impedanční spektroskopií

Abstract

Na meranie sa použili dva prítroje, a to Analog Discovery 2 od firmy Digilent a impe- dančný analyzátor Keysight E4990A. Každý bol použitý na troška iné meranie. Zisťovalo sa správanie impedancie mlieka na nízkych frekvenciách a ako sa správa impedancia mlieka, aj mlieko samotné, pokiaľ je vystavené jednosmernému polarizačnému napätiu. Nakoniec sa vypočítali z nameraných charakteristík náhradné impedančné modely, ktoré sa porovnali, porovnali sa ich priebehy so skutočnými nameranými priebehmi a porovnanie nameraných charakteristík medzi jednotlivými prístrojmi.

Two instruments were used for the measurements: the Analog Discovery 2 by Digilent and the Keysight E4990A impedance analyzer. Each was used for slightly dierent types of measurements. The study investigated the impedance behavior of milk at low frequencies and how the impedance of milk, as well as the milk itself, behaves when exposed to a DC polarization voltage. At the end, equivalent impedance models were calculated from the measured characteristics, and these models were compared. The comparison included the curves of the models with the actual measured curves, as well as a comparison of the measured characteristics between the dierent instruments.