2,4-D Retention on Primesep 100 and Obelisc R

 

2,4-D makes up half of the formula for Agent Orange, the defoliant that was used during the Vietnam War and Malayan Emergency. Commonly used in lawn and turf pesticides, 2,4-D is typically mixed with other pesticides such as mecoprop and dicamba. It was analyzed on Primesep 100 and Obelisc R. Primesep 100 separates using reverse-phase and acidic ion-pairing groups. Obelisc R has many modes of separation which allow it to tune retention. Method is LC/MS compatible and conditions could be replicated to retain many pesticides.

Condition 1

Column Obelisc R, 2.1×150 mm, 5 µm, 100A
Mobile Phase Gradient MeCN – 25-70%
Buffer Gradient AmAc pH 3.0- 30-60 mM
Flow Rate 0.4 ml/min
Detection UV, 270 nm

 

Condition 2

Column Obelisc R, 2.1×150 mm, 5 µm, 100A
Mobile Phase Gradient MeCN – 10-70%
Buffer Gradient AmAc pH 3.0- 20-60 mM
Flow Rate 0.4 ml/min
Detection UV, 270 nm

 

Condition 3

Column Primesep 100, 2.1×150 mm, 5 µm, 100A
Mobile Phase Gradient MeCN – 10-70%
Buffer Gradient AmAc pH 3.0- 20-60 mM
Flow Rate 0.4 ml/min
Detection UV, 270 nm

 

Description

Class of Compounds
 Insecticide, Pesticide, Hydrophobic, Ionizable
Analyzing Compounds 2,4-D

 

Application Column

Obelisc R

SIELC has developed the Obelisc™ columns, which are mixed-mode and utilize Liquid Separation Cell technology (LiSC™). These cost-effective columns are the first of their kind to be commercially available and can replace multiple HPLC columns, including reversed-phase (RP), AQ-type reversed-phase, polar-embedded group RP columns, normal-phase, cation-exchange, anion-exchange, ion-exclusion, and HILIC (Hydrophilic Interaction Liquid Chromatography) columns. By controlling just three orthogonal method parameters - buffer concentration, buffer pH, and organic modifier concentration - users can adjust the column properties with pinpoint precision to separate complex mixtures.

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Primesep 100

The Primesep family of mixed-mode columns offers a wide variety of stationary phases, boasting unprecedented selectivity in the separation of a broad array of chemical compounds across multiple applications. Corresponding Primesep guard columns, available with all stationary phases, do not require holders. SIELC provides a method development service available to all customers. Inquire about our specially-tailored custom LC-phases for specific separations.

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Application Analytes:
2,4-Dichlorophenoxyacetic acid

Application Detection:
UV Detection
SIELC Technologies usually develops more than one method for each compound. Therefore, this particular method may not be the best available method from our portfolio for your specific application. Before you decide to implement this method in your research, please send us an email to research@sielc.com so we can ensure you get optimal results for your compound/s of interest.