DL-γ-Amino-n-Butyric Acid aijiren Tech Scientific, P/N 207531 L-Tyrosine aijiren Tech Scientific, P/N 14064 Reagent Vials and Seals (for OPA/NAC Reagent and Acid Diluent) aijiren Tech, P/N 6820.0023 Sample Vial aijiren Tech, P/N 6000.0077 Sample Vial Cap aijiren Tech, P/N 6000.0076 Mobile Phase Preparation