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Food and Drug Administration is expanding its use of artificial intelligence to screen imported goods, relying on large-scale datasets and quantitative analytical techniques to identify potential risks before products reach the border

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In a broad aspect the present invention relates to a cation exchange chromatography process for purifying a peptide from a mixture comprising said peptide and related impurities, comprising the step of: separating said peptide and said related impurities of said mixture by elution in a solution comprising an organic modifier, water, optionally a salt component, and optionally a buffer, with a linear or step gradient or isocratically in salt component and/or with a linear or step pH-gradient or at a constant pH-value, wherein the pH-gradient or pH-value should be in the range where said peptide has a positive local or overall net charge different from the local or overall positive net charge of said related impurities so as to remove said related impurities