Spark emission spectrometer and method for operating same

An optical emission spectrometer with at least one spark chamber comprising an oblong electrode being arranged inside thereof and at least one entry for an inert gas, wherein the inert gas entry is arranged such that the inert gas flows around the electrode along its longitudinal axis, wherein in the inert gas entry and/or between inert gas entry and electrode at least one sieve-like insert is provided and/or the electrode in the flow cross-section of the inter gas flow is surrounded by at least one sieve-like insert,

• wherein a further inert gas entry is provided in the spark chamber,
• wherein the electrode is at least partially surrounded by a nozzle which in at least a portion along the electrode tapers so that this results in a necking of the inert gas flow,
• wherein the electrode extends to a region outside the nozzle which is adjacent to a window and that the inter gas entry of the inert gas is arranged between the window and the electrode, and
• wherein the further inert gas entry is arranged such that the flow deviates by at least 10° with respect to the longitudinal axis of the electrode into the direction of the window.