89results about "Tube electrostatic deflection" patented technology

Methods and analysers useful for time of flight mass spectrometry are provided. A method of separating charged particles comprises the steps of: providing an analyser comprising two opposing mirrors each mirror comprising inner and outer field-defining electrode systems elongated along an axis z, the outer system surrounding the inner and defining therebetween an analyser volume, the mirrors creating an electrical field within the analyser volume comprising opposing electrical fields along z, the strength along z of the electrical field being a minimum at a plane z=0; causing a beam of charged particles to fly through the analyser, orbiting around the z axis within the analyser volume, reflecting from one mirror to the other at least once thereby defining a maximum turning point within a mirror; the strength along z of the electrical field at the maximum turning point being X and the absolute strength along z of the electrical field being less than |X| / 2 for not more than ⅔ of the distance along z between the plane z=0 and the maximum turning point in each mirror; separating the charged particles according to their flight times; and ejecting at least some of the charged particles having a plurality of m / z from the analyser or detecting the at least some of charged particles having a plurality of m / z, the ejecting or detecting being performed after the particles have undergone the same number of orbits around the axis z.

The invention provides an ion mobility analyzer and a combination unit thereof and an ion mobility analysis method. The ion mobility analyzer comprises an electrode system that surrounds an analysis space, and a power supply device that attaches to the electrode system an ion mobility potential field which moves along a space axis direction. In an analysis process of the mobility of ions to be tested, the ions to be tested are placed in a motion migration electric field all the time, the direction of motion of the migration field is always the same as an electric field force that the ions to be tested are subjected to in the migration field, in theory, an infinitely long migration path can be formed, ions with extremely small difference in mobility or particle size are distinguished. Through nonlinearity of the migration field, simultaneous space constraint and separation effects of ions of various mobility can be realized. The analyzer can be combined with various ion sources, detectors, mass analyzers, other ion mobility analyzers and chromatographic and spectral analysis methods, and is easy to form a large-scale analyzer array together with electrodes through a multiplexing power supply.

An interface for mass spectrometers. The interface uses non coaxial sampling pathways of the analyte ion beam prior to entering the entrance of a mass spectrometer for decreasing chemical background, and can be done in such a way as to permit multiple sprayers, increasing sample throughput and sensitivity for LC / MS (liquid chromatography / MS). The interface includes an ion source having an exit from which a beam of analyte ions are emitted, a curtain plate and an aperture in the curtain plate member, an orifice plate having an orifice therein. The orifice plate is being spaced from the curtain plate member defining a flow passageway therebetween, and the aperture in the orifice plate is aligned with a sample entrance to a first vacuum stage of a mass spectrometer maintained substantially lower than atmospheric pressure. The aperture in the curtain plate member is non coaxially aligned with the orifice in the orifice plate and the interface includes a gas flow mechanism for directing a counter flow gas into the flow passageway.