QIAquick Nucleotide Removal procedure. Complete removal of nucleotides from labeled oligos. GelPilot Loading Dye. Spin column handling options — B. Spin column handling options — A. Polyacrylamide gel analysis of radioactive labeling reactions before (b) and after (a) purification using the QIAquick Nucleotide Removal Kit are shown. GelPilot Loading Dye contains three tracking dyes to facilitate optimization of DNA resolution. QIAcube. Microcentrifuge.