This publication uses a column 150 x 4.6 mm, the void volume of this column is 1.75 mL. At the flow rate of 1.2 mL/min, the non-retain peak should be out at 1.75/1.2 = 1.45 min. However, the glyphosate is eluted at 0.86 min. Something is missing here.

Chapter Residue Analysis of Glyphosate and Aminomethylphosphonic Aci...

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