Abstract: A device for UV-spectrometric analysis of gaseous compounds includes a measurement channel, a window member transparent for ultraviolet radiation, a radiation source capable of generating ultraviolet radiation, and a spectrographic member for measuring of ultraviolet radiation emitted by the radiation source. The device is arranged such that ultraviolet radiation entering the measurement channel can propagate through the measurement channel, interact with the accommodated gas and be measured by the spectrographic member. An end of the measurement channel is open towards the window member and a channel for guiding a protection gas is arranged in connection to the window member such that protection gas fed through the protection gas channel is allowed to flow over and cover the side of the window member facing the measurement channel and to flow further into the measurement channel.

Abstract: The invention concerns a device (20) for UV-spectrometric analysis of gaseous Compounds, comprising: a measurement Channel (5) to accommodate a flow of sample gas, a window (16) transparent for ultraviolet radiation arranged at a first end (5a) of the measurement Channel (5), a radiation source (11) generating ultraviolet radiation arranged to emit radiation through the window (16) into the measurement Channel (5), and a spectrograph (3) for measuring ultraviolet radiation at a second, opposite, end (5b) of the measurement Channel (5). The invention is characterized in that the spectrograph (3) is provided with an opening (12) wherein the second end (5b) of the measurement Channel (5) is open towards the spectrograph (3) such that an inside of the spectrograph (3) and the measurement Channel (5) are in communication via said opening (12). The spectrograph (3) is filled with a protection gas which is allowed to flow through said opening (12) and into the measurement Channel (5).

Abstract: The invention concerns a device (20) for UV-spectrometric analysis of gaseous compounds, said device (20) comprising: a measurement channel (5) intended to accommodate a flow of sample gas to be analyzed, a window member (16) transparent for ultraviolet radiation arranged at a first end (5a) of the measurement channel (5), a radiation source (11) capable of generating ultraviolet radiation arranged to emit radiation through the window member (16) and into the measurement channel (5), and a spectrographic member (3) for measuring of ultraviolet radiation emitted by the radiation source (11) arranged at a second, opposite, end (5b) of the measurement channel (5), wherein the device (20) is arranged such that ultraviolet radiation entering the measurement channel (5) at the first end (5a) can propagate through the measurement channel (5), interact with the accommodated gas and be measured by the spectrographic member (3) at the second end (5b) of the measurement channel (5).

Abstract: The invention concerns a device (20) for UV-spectrometric analysis of gaseous Compounds, comprising: a measurement Channel (5) to accommodate a flow of sample gas, a window (16) transparent for ultraviolet radiation arranged at a first end (5a) of the measurement Channel (5), a radiation source (11) generating ultraviolet radiation arranged to emit radiation through the window (16) into the measurement Channel (5), and a spectrograph (3) for measuring ultraviolet radiation at a second, opposite, end (5b) of the measurement Channel (5). The invention is characterized in that the spectrograph (3) is provided with an opening (12) wherein the second end (5b) of the measurement Channel (5) is open towards the spectrograph (3) such that an inside of the spectrograph (3) and the measurement Channel (5) are in communication via said opening (12). The spectrograph (3) is filled with a protection gas which is allowed to flow through said opening (12) and into the measurement Channel (5).

Abstract: Column for liquid chromatography contains a glass tube for sorbent packing closed with simple column seals and inserted into a jacket made of metal or plastic material. The jacket transfers axial forces exerted on the column seals by liquid pressure action by means of sockets. It secures the tightness of the column, enables the connection of the column to a chromatographic system, and has a protective function at the same time. The columns can be coupled in series by means of doubled sockets.

Abstract: The invention pertains to the sealing of pistons for pressurizing, pumping and displacing aggressive liquids and organic solvents. The design includes the sealing head proper and its attachment to the piston. Owing to its shape and material it is made of, the sealing head ensures a variable sealing thrust proportional to the pressure acting on the piston, thus enhancing the useful life of the seal.

Abstract: The invention relates to a method for preparation of perfectly spherical particles of silicagel with controlled particle size and controlled pore diameter, which are suitable as packings for high-speed liquid chromatography and gel permeation chromatography. Free liquid silicic acid is obtained by acidifying of solutions of alkaline metal silicates in organic solvents by organic acids miscible with water in the presence of higher amine as an emulsifier and polymerized to hydrogel in the form of spherical particles. These are isolated and partially hardened by heating above 100.degree. C in a neutral organic medium, e.g. amyl acetate or dibutyl sebacate, to remove a part of water by distillation, then subjected to hydrothermal processing with water under pressure at a temperature above 150.degree. C and eventually stabilized.