IDEA #902FTE Millimeter wavelenth dielectrometer for wines and fruit juices authenticity determination

MILLIMETER WAVELENTH DIELECTROMETER FOR WINES AND FRUIT JUICES AUTHENTICITY DETERMINATION Photos/Pictures: an and temperature frequency. The Description: We present automated millimeter wavelengths (31.8GHz) dielectrometer with high differential sensitivity to identify wines and fruit juices authenticity. The wine trade is a multi-million-income industry in which fraud can have enormous financial repercussions. Therefore the development of reliable and simple methods of wines and fraud identification is very actual. The innovation element of the dielectrometer is differential cavity that consists of two identical cells (Fig. 1). The base of the proposed identification method is the measurement the difference of complex permittivity (CP) of monitoring liquid in one cell and CP of distilled water in another cell. We use the dependence of electromagnetic wave propagation constant on CP of liquid. CP of monitoring wines is calculated using measured difference of attenuation and phase shifts of the waves in the cells and also known CP of distilled water at definite absolute measurement errors of the difference of attenuation and phase shifts do not exceed 0.005 dB and 0.001 rad, respectively. Thus, our dielectrometer allows with confidence to detect a rather small СР difference between two high loss liquids (of order of 0.01%). Innovative aspect and main advantages: The nowadays analysis of wines and fruit juices is the classical methods of analytical chemistry that are generally time-consuming and/or expensive and not suitable for continuous monitoring. At tasting the subjective factor presents. We suggest the usage of the CP as an integral parameter of physical- chemical wine and fruit juice structure to solve the task of fast monitoring of wine and fruit juice composition and authenticity testing. The time of sample analysis using the dielectrometer does not exceed one minute and an active storage is only distilled water. The measurement process is automated and the dielectrometer can be managed by personnel with technical secondary education. The verification nature test of dielectriometer sample was carried out together with National Institute of Vine and Wines “Magarach” (Ukraine). We determined enough high paired correlation of CP of monitoring wines with main physical –chemical wine parameters (Table 1). It permits, for example, to determine the region of wine manufacture of the same sort or to detect fraud by adding water to pulp or must before the fermentation process. Areas of Application: The CP measurement can be used by testing laboratories of Ukraine and other countries for quality assessment of the wines and juices as an express inspection certification low – cost system. For example, the dielectrometer is delivered to National Institute of Vine and Wines “Magarach” for testing under practice conditions. The proposed dielectrometer can be directly built into the technological process stream of wine production. Also the dielectrometer can be used as a device for scientific research at physical and chemical properties of water solutions, for example, biological liquids. Fig.1. The measurement cell of the dielectrometer - the brass cylinder cavity filled with high loss liquid under test. 1 is the liquid under test; 2 is the quartz rod of 2.5 mm of radius and 28 mm of length; 3 and 4 are the input/output waveguides. (E.M.Ganapolskii, Z.E.Eremenko, V.N. Skresanov “A millimeter wave dielectrometer for high loss liquids based on the Zenneck wave”. Measurement Science and Technology (UK), V. 20 (2009) 055701 (8pp)). Parameter ε′ ε′′ - 1.0 - 0.84 - 0.98 - 0.88 - 0.93 - 0.77 - 0.98 0.11 - 0.92 -0.05 fraction of 0.80 - 0.89 0.72 - 0.97 0.28 -0.37 0.03 -0.52 0.56 0.80 - 0.92 0.80 - 0.94 0.15 -0.24 0.16 -0.52 0.39 Basic Volume ethanol Mass concentration: sugars Common extract Titratable acids Additional Mass concentration: glycerol Malic acid Succinic acid Specific conductivity Kinematic viscosity Tartaric acid рН Potassium Sodium Calcium Table.1 Coefficient of pair correlation between real 2ε′ and imaginary 2ε′′ CP parts of natural white table wines and their physical-chemical parameters. Values in bold are for coefficient of pair correlation more than |0.7|. Stage of Development: The millimeter wave band dielectrometer which can be used to the identification of grape table wines and juices now field tested, available for demonstration. Contact details: Contact person: Zoya Eremenko Institute for Radiophysics and Electronics named after A. Usikov, National Academy of Sciences of Ukraine 12 Akademika Proskura Str. 61085, Kharkov, Ukraine. Tel: (380-57)-7203-385; Fax: (380-57)-3152-105 Mob: 38(097) 527-60-10 E-mail: zoya.eremenko@gmail.com Web-site: http://www.ire.kharkov.ua/