Plexa Polymeric SPE

Agilent Bond Elut Plexa Polymeric SPE

Polymeric SPE sorbents engineered for cleaner extracts, lower matrix interference, and reliable sample preparation.

Agilent Bond Elut

Agilent Bond Elut Plexa Polymeric SPE products are designed to deliver cleaner extracts, reproducible recovery, and efficient solid phase extraction across demanding analytical workflows. The Plexa platform uses a distinctive polymeric architecture with a nonretentive, hydroxylated outer surface and a hydrophobic polymeric core, helping reduce binding of proteins and lipids at the sorbent surface while retaining small-molecule analytes more effectively.

This category brings together the core Bond Elut Plexa family, including general-purpose polymeric extraction as well as mixed-mode chemistries for selectively targeting basic or acidic compounds. By reducing matrix interferences and improving extract cleanliness, Plexa sorbents can help laboratories improve LC/MS sensitivity, support reproducible sample preparation, and simplify method development for complex biological and aqueous samples.

Bond Elut Plexa

Bond Elut Plexa is a general-purpose polymeric SPE sorbent designed for easy-to-use extraction methods and broad small-molecule retention. Its nonpolar PS-DVB core retains analytes while the hydroxylated, amide-free surface helps minimize protein and lipid fouling, producing cleaner samples and reduced ion suppression in downstream analysis.

Bond Elut Plexa PCX

Bond Elut Plexa PCX combines the clean-extract advantages of the Plexa platform with strong cation exchange functionality. This mixed-mode sorbent is designed to remove neutral and acidic interferences from the matrix while concentrating basic analytes, making it well suited for selective extraction and fractionation in biological and aqueous sample workflows.

Bond Elut Plexa PAX

Bond Elut Plexa PAX is a mixed-mode polymeric anion exchanger developed for extraction of acidic analytes. Agilent positions this chemistry for improved analyte cleanup and reproducibility with polar and nonpolar acidic compounds, helping laboratories reduce endogenous interferences and improve method robustness in challenging matrices.

Cleaner Extracts for Sensitive LC/MS Workflows

A major advantage of the Plexa design is improved extract cleanliness. By minimizing matrix-related background components, Bond Elut Plexa sorbents can help reduce ion suppression, improve reproducibility, and support better quantitative performance in LC/MS and other high-sensitivity analytical methods.

Built for Throughput and Reproducibility

Agilent offers Bond Elut Plexa chemistries in cartridge and well-plate formats to support both routine and higher-throughput sample preparation. The family is designed to support simplified workflows, reproducible manufacturing consistency, and dependable performance across laboratories handling environmental, pharmaceutical, food, and bioanalytical applications.

Chrom Tech supplies Agilent Bond Elut Plexa Polymeric SPE products for laboratories seeking cleaner extracts, targeted selectivity, and robust polymeric SPE performance. Whether your method calls for general-purpose retention, cation exchange for basic analytes, or anion exchange for acidic compounds, the Plexa family provides flexible options for modern sample preparation workflows.

Key Definitions â–¸
Polymeric SPE
A solid phase extraction format that uses polymer-based sorbents rather than silica, often selected for broad chemical compatibility, strong retention, and improved performance in complex sample matrices.
Bond Elut Plexa
A general-purpose polymeric SPE sorbent from Agilent designed to retain small molecules while helping reduce matrix interference through its hydroxylated outer surface and hydrophobic core structure.
Hydroxylated Outer Surface
The outer surface design of Bond Elut Plexa sorbents, intended to reduce unwanted interaction with proteins and lipids so extracts can be cleaner before chromatographic analysis.
PS-DVB Core
A hydrophobic polystyrene-divinylbenzene polymer core that provides the primary nonpolar retention mechanism in Bond Elut Plexa sorbents.
Mixed-Mode SPE
An SPE chemistry that combines more than one retention mechanism, such as nonpolar retention plus ion exchange, to improve analyte selectivity and sample cleanup.
Plexa PCX
A mixed-mode, nonpolar polymeric strong cation exchange sorbent used to retain basic analytes while removing neutral and acidic interferences from the sample matrix.
Plexa PAX
A mixed-mode, nonpolar polymeric strong anion exchange sorbent designed for selective extraction of acidic analytes, including compounds such as carboxylic acids, peptides, and amino acids.
Matrix Interference
Unwanted sample components, such as proteins, lipids, salts, or endogenous compounds, that can reduce sensitivity, create background noise, or interfere with reproducible analysis.
Ion Suppression
A reduction in LC/MS signal caused by co-extracted matrix components that interfere with ionization, often improved by cleaner SPE extracts.
Frequently Asked Questions â–¸
What is Agilent Bond Elut Plexa Polymeric SPE used for?
Agilent Bond Elut Plexa Polymeric SPE is used for sample cleanup, analyte isolation, and concentration prior to chromatographic analysis. It is especially useful when laboratories need cleaner extracts and lower matrix interference in LC/MS and other sensitive workflows.
What makes Bond Elut Plexa different from conventional polymeric SPE sorbents?
Bond Elut Plexa uses a distinctive structure with a hydroxylated, nonretentive outer surface and a hydrophobic polymeric core. This design helps reduce unwanted protein and lipid binding at the surface while still retaining small-molecule analytes more effectively.
What is the difference between Bond Elut Plexa, Plexa PCX, and Plexa PAX?
Bond Elut Plexa is the general-purpose nonpolar polymeric sorbent. Plexa PCX adds strong cation exchange functionality for extraction of basic analytes, while Plexa PAX adds strong anion exchange functionality for selective extraction of acidic analytes.
When should Bond Elut Plexa PCX be used?
Bond Elut Plexa PCX is typically used when the target compounds are basic analytes and the method benefits from removing neutral and acidic interferences from the matrix during extraction.
When should Bond Elut Plexa PAX be used?
Bond Elut Plexa PAX is generally chosen for acidic analytes when the method requires strong anion exchange selectivity along with nonpolar polymeric retention to improve cleanup and reproducibility.
How does Bond Elut Plexa help reduce matrix effects?
The Plexa sorbent design helps reduce co-extraction of proteins, lipids, and other interfering background components. Cleaner extracts can improve sensitivity, reduce ion suppression, and support more reproducible quantitative results.
Is Bond Elut Plexa available in high-throughput formats?
Yes. Agilent offers Bond Elut Plexa products in cartridge and well-plate formats, allowing laboratories to support both routine sample preparation and higher-throughput workflows.
Does Chrom Tech help with Bond Elut Plexa SPE selection?
Yes. Chrom Tech can help identify the best Bond Elut Plexa format and chemistry based on whether your method requires general-purpose cleanup, cation exchange for basic analytes, or anion exchange for acidic compounds.