Retention of N-Nitrosarcosine on Obelisc N Column

N-Nitrocarcosine is very polar compound with LogP of -0.5. It is a nitro derivative of glycine which is slightly acidic. HPLC method was developed on Obelisc N HILIC mixed-mode HPLC column. Nitrosarcosine is retained by combination of hydrophilic interaction chromatography and anion-exchange interaction. Compound exists in two forms which can be separated by adjusting pH of the mobile phase. Method is LC/MS compatible and uses ammonium formate as mobile phase modifier.

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