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As an alterative to photodiode array or mass spectral analysis, a heart-cutting two-dimensional liquid chromatography technique (2D-LC) can be utilized to assess peak purity. In this work, the strengths of the heart-cutting 2D-LC technique are presented by highlighting a case study where a co-eluting impurity present at 0.8 % was non-detectable using traditional methods. However, when fractions taken...
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