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In page Inductively coupled plasma mass spectrometry:

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The integrated Collisional Reaction Cell (iCRC) used by Analytik Jena ICP-MS is a mini-collision cell installed in front of the parabolic ion mirror optics that removes interfering ions by injecting a collisional gas (He), or a reactive gas (H2), or a mixture of the two, directly into the plasma as it flows through the skimmer cone and/or the sampler cone.[6][7] The iCRC removed interfering ions using a collisional kinetic energy discrimination (KED) phenomenon[citation needed] and chemical reactions with interfering ions similarly to traditionally used larger collision cells.