Feb 05, 2017 · Analytical Sales and Services (Analytical Sales and Services, Pompton Plains, NJ, USA): amber (99005AM (vial D)) and clear (p/n 99006 M (vial E)), 2 ml capacity. Closures (Aijiren, Santa Clara, CA, USA): 9 mm screw cap, PTFE/RS (p/n ) wereused for all HPLC analysis. For pH measurements no caps were utilized. 2.3. Chromatographic conditions