Samples were loaded into U-shaped borosilicate glass tubes, and excited to vibrate at their characteristic frequencies. The characteristic frequency varies with the sample's density. By measuring the characteristic frequency, the density of the sample can be calculated. Given the temperature dependence of the density value, the temperature of the sample must be accurately determined.
Concentration Measurement:
In binary mixtures, the density is a function of the components. Therefore, with the aid of density/concentration tables, the density values of binary mixtures can be used to calculate their constituent components. This program is also applicable to approximate binary mixtures. These mixtures contain two primary components and some additional components with concentrations much lower than those of the two primary components.
Many carbonated soft drinks can be considered a quasi-binary mixture of sugar and water, as the concentration of flavorings and acids is much lower compared to sugar and water. Consequently, the sugar concentration can be measured using a hydrometer. This applies similarly to the determination of alcohol concentration in distilled spirits, which can also be regarded as a quasi-binary mixture of ethanol and water.
The DMA35 portable density meter measures liquid density (units: g/cm³ or kg/m³) using the U-tube oscillation method. In addition to density, users can also choose from various other measurement units (relative density, density at reference temperature, concentration).
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