GC Analysis of Glycols in Water on SPB^®-1000 after SPE using ENVI-Carb^™ Plus

sample preparation

SPE (Solid Phase Extraction)

sample/matrix

tap water spiked at 2 μg/mL with glycols

SPE tube/cartridge

ENVI-Carb Plus reversible cartridge, 400 mg/ 1mL (54812-U)

condition

1 mL methylene chloride, 2 x 2 mL methanol, 3 mL deionized water (cartridge not allowed to dry during conditioning)

sample addition

5 mL spiked tap water

drying

10 min, 10 mm mercury

elution

2 mL 80:20 methanol:methylene chloride

column

SPB-1000, 30 m x 0.25 mm I.D., 0.25 μm (24313)

oven

50 °C (1 min), 8 °C/min to 200 °C (7 min)

inj. temp.

220 °C

detector

FID, 220 °C

carrier gas

helium, 1.5 mL/min. constant

injection

1 μL, splitless (splitter open at 0.75 min.)

liner

4 mm I.D. FocusLiner^™ inlet liner with taper