Method for studying liquid and device for carrying out said method
    3.
    发明授权
    Method for studying liquid and device for carrying out said method 失效
    用于研究液体的方法和用于执行所述方法的装置

    公开(公告)号:US06874357B2

    公开(公告)日:2005-04-05

    申请号:US10466845

    申请日:2002-08-01

    Abstract: The present invention relates to physical chemistry and can be used for a quality test of liquids, in particular, multi-component liquid products, to ascertain the conformity of various process liquids, pharmaceutical preparations, foodstuffs, biological liquids to standard in pharmacology, food processing and chemical industries, and in medical diagnostics. The method of invention enables determining of the mechanical impedance within a drop (1) of test liquid having a specified volume, in the preferred embodiment, 5 mcl, placed on the surface of a piezoelectric resonator (3) of ultrasound frequencies, which provides for excitation of shear modes within drop (1) while it is drying up. The obtained time dependence of the mechanical impedance of drop (1) is used as the information parameter. This information parameter is rather sensitive to the state of the liquid-crystalline structure of multi-component liquids, therefore, comparing the obtained time dependence with the same data for the etalon specimen allows one to assess the composition of a multi-component liquid, test the quality of liquid products, for example, foodstuffs, assess the prospective effectiveness of medical treatment with various medical preparations through analysis of a biological liquid, etc.In the apparatus of invention, the mechanical impedance of test liquid is determined from the disbalance voltage of a bridge circuit (9) comprising a piezoelectric resonator of ultrasound frequencies (3), in preferred embodiments, from the amplitude and/or phase of the disbalance voltage, which ensures high accuracy of measurements.

    Abstract translation: 本发明涉及物理化学,并且可以用于液体,特别是多组分液体产品的质量测试,以确定各种工艺液体,药物制剂,食品,生物液体与药理学标准,食品加工 化学工业和医疗诊断。 本发明的方法使得能够确定放置在超声频率的压电谐振器(3)的表面上的具有指定体积的测试液体的液滴(1)中的机械阻抗,该特定体积在优选实施例中为5mcl,其提供 在干燥期间在液滴(1)内激发剪切模式。 所获得的液滴(1)的机械阻抗的时间依赖性被用作信息参数。 该信息参数对多组分液体的液晶结构的状态相当敏感,因此,将获得的时间依赖性与标准具样品的相同数据进行比较允许评估多组分液体的组成,测试 液体产品,例如食品的质量,通过分析生物液体等来评估各种药物制剂的医疗前景效果。在本发明的装置中,测试液体的机械阻抗由不平衡电压 在优选实施例中,包括超声波频率(3)的压电谐振器的桥接电路(9),来自所述不平衡电压的幅度和/或相位,这确保了测量的高精度。

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