SPE (Solid Phase Extraction)
Fresh 1 L water samples, dechlorinated with sodium thiosulfate when necessary, at ambient temperature and pH.
Supelclean ENVI-Carb, 250 mg/6 mL (57092)
10 mL DI water at 20 mL/min
0.9 L water sample at 20 mL/min
10 min using clean nitrogen
10 mL DI water at 20 mL/min
10 mL 0.1% phosphoric acid in methylene chloride:acetonitrile (80:20) at 5 mL/min
polymeric-coated silica-based PAH specialty column, 20 cm × 3 mm I.D., 5 μm (Supelco equivalent, SUPELCOSIL LC-PAH, available upon request)
gradient, [A]: 0.05% phosphoric acid in DI water; [B]: acetonitrile
0.5 mL/min
50 °C
photodiode array- peak width: 0.053 min, sampling interval: 0.320 sec, monitor 210 nm & 225 nm
10 μL of extract (4-5 ppb each analyte in water)
using Zymark AutoTrace Extraction WorkStation 1.20
ENVI is a trademark of Sigma-Aldrich Co. LLC
Supelclean is a trademark of Sigma-Aldrich Co. LLC