HPLC Analysis of Triazine Herbicides in Grass on SUPELCOSIL^™ LC-8-DB after SPE using Supelclean^™ LC-SCX

sample preparation

SPE (Solid Phase Extraction)

sample/matrix

fresh grass clippings spiked with herbicides at 2 ppm

SPE tube/cartridge

Supelclean LC-SCX, 500 mg/3 mL (57018)

condition

1 mL methylene chloride

sample addition

2 mL grass extract. Wash with 2 x 2 mL acetonitrile.

drying

Dry packing for 5 min. under nitrogen purge

washing

Dry packing for 5 min under nitrogen purge; wash with 2 x 2 mL DI water

elution

1.5 mL methanol

eluate post-treatment

dilute to 2 mL with DI water

column

SUPELCOSIL LC-8-DB, 15 cm × 4.6 mm I.D., 5 μm (58347-U) with guard column (59553)

mobile phase

[A] acetonitrile; [B] water; (45:55, A:B)

flow rate

1.5 mL/min

detector

UV, 254 nm

injection

100 μL