Piezoelectric sensor for e.g. determining impulses of individual drops impinging on measuring surfac

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It a method is described for the analytical determination of alkaline earth carbides or- [...] with the aid of the Raman spectroscopy, which is characterized thereby that a) the alkaline earth carbide containing sample with a monochromatic light source in the wavelength range of or- [...] 200 to 1200 nm irradiated, b) the light reflected from the sample by means of suitable optical devices into its components of different wavelengths after cutting and c) the wavelength dependent intensity of the reflected luminous flux measures light with a wave length range, about 1700 to 2000 cm - 1 with respect to the irradiated wavelength is red or blue-shifted. It has shown this surprisingly that with the process of the invention, and thus a qualitative and quantitative detection of a content determination of alkaline earth carbides [...], in particular of calcium carbide and/or calcium carbide--containing solid substances is possible. The measurement values obtained with the method of analysis according to the invention can here for controlling quality of product produced and/or used for the control of the corresponding installations be used and/or used.