Abstract: The present invention relates to a painted sheet metal part, such as a car body, with a polyacid layer between the coat of paint and the surface of the sheet metal part and to a method for applying such a coating on the part before painting. Initially, the part is cleaned and de-greased, and subsequently the polyacid layer is deposited and stabilized. In order to be able to apply this layer without losing wet adhesion qualities of the coat of paint and the anti-corrosive effect of coating layer, while presenting fewer ecological disadvantages or harmful consequences, polyacids, which comprise homopolymers or copolymers of carboxylic acids containing double bonds or of functional esters of carboxylic esters, or copolymers of carboxylic acids with vinyl compounds, are used pursuant to the present invention as the protective bonding layer. The polyacids used are further combined with polymers having a glass transition temperature above 100.degree. C.

Abstract: The invention concerns a process and a device for taking samples in particular from waste gases containing substances of moderate and low volatility in a gas or aerosol phase. To this end, a partial current is diverted and conducted into a separation area (10), where the substances to be tested from the partial current, either in dust-bonding form or in the condensate, undergo a separation process and are fixed. When applied to a specific sample for the analysis of organic substances of medium to low volatility, in particular polychlorinated dibenzo(p)dioxins (PCDD) and polychlorinated dibenzofurans (PCDF), the separation process can be restricted according to the invention in such a way that the partial current, together with the gaseous and liquid water portion contained in it, undergoes a two-stage separation process, where it is drawn through an inert dust-filter region (11), and drawn through a region (12) filled with an adsorber such as a synthetic adsorbent resin with a multi-reticular structure.

Abstract: In a process for obtaining in a continuous operation a specimen gas from a flowing gas current of a pressurized crude gas for analysis purposes, a branch current is withdrawn from the main current in an anisokinetic manner whereupon the branch current of the crude gas is passed through a cooling device and a specimen is then withdrawn from the branch current likewise in an anisokinetic manner and the specimen is subjected to pressure release and filtering prior to passing it into a gas analysis apparatus.