SPE Products

MCX SPE cartridge eluting basic drugs with ammonia methanol solution

Optimizing SPE Elution Solvents for Basic Drug Extraction Using MCX Cartridges

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Chemical Structure of MCX Sorbent: Sulfonic Acid Functionality Mixed-mode cation exchange (MCX) cartridges represent a sophisticated approach to solid-phase extraction, combining both hydrophobic and ionic retention mechanisms. The sorbent consists of a silica-based substrate with bonded hydrophobic chains (typically C8 or C18) and sulfonic acid groups. These sulfonic acid moieties are strong acid functionalities (pKa […]

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robotic system performing SPE extraction using 96-well plate

Automating SPE Sample Preparation with 96-Well Plates

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Advantages of High-Throughput SPE Solid-phase extraction (SPE) has evolved significantly from traditional cartridge formats to high-throughput 96-well plate systems, revolutionizing sample preparation workflows in pharmaceutical, clinical, and environmental laboratories. The transition to automated SPE platforms offers substantial advantages over manual methods, particularly when processing large sample volumes. High-throughput SPE systems provide improved precision, accuracy, and

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WCX SPE cartridge used to isolate aminoglycoside antibiotics

WCX SPE for Extracting Aminoglycoside Antibiotics

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Characteristics of Aminoglycoside Antibiotics Aminoglycosides represent a class of broad-spectrum antibiotics with distinctive structural and chemical properties that present unique challenges for analytical extraction. These compounds, including gentamicin, tobramycin, streptomycin, and amikacin, share common features: multiple amino groups (typically 2-6), hydroxyl groups, and glycosidic linkages that contribute to their high polarity and water solubility. From

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MCX SPE cartridge used in forensic toxicology sample preparation

Using MCX SPE for Forensic Drug Analysis

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Common Forensic Drugs Analyzed with MCX SPE Mixed-mode cation exchange (MCX) solid phase extraction has become a gold standard in forensic toxicology laboratories for analyzing basic drugs and their metabolites. The most commonly targeted compounds include amphetamine and methamphetamine (phenylethylamine derivatives) and cocaine metabolites such as benzoylecgonine and norcocaine. These substances are potent central nervous

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MCX cartridge removing plasma interferences in analytical chemistry lab

Removing Matrix Interference in Plasma Using MCX SPE

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Major Plasma Interferences: Phospholipids, Proteins, and Salts Plasma presents one of the most challenging matrices for analytical chemists due to its complex composition. The three primary interference categories that significantly impact LC-MS analysis are phospholipids, proteins, and salts. Phospholipids are particularly problematic as they cause matrix effects, ion suppression, shorten column lifetime, increase MS maintenance

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WCX SPE cartridge used in peptide purification workflow

WCX SPE Protocol for Peptide Sample Cleanup

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Why WCX Works Well for Peptides: Understanding pKa Behavior Weak Cation Exchange (WCX) solid-phase extraction represents a sophisticated mixed-mode approach that combines both ion-exchange and reversed-phase retention mechanisms. This dual functionality makes WCX particularly effective for peptide sample cleanup, especially when dealing with strong bases and quaternary amines. The key to understanding WCX’s effectiveness lies

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MCX SPE cartridge extracting antidepressant compounds before LC-MS analysis

Step-by-Step Method for Extracting Antidepressants with MCX SPE

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Target Antidepressants for MCX SPE Extraction Mixed-mode cation exchange (MCX) solid phase extraction is particularly well-suited for the isolation of basic antidepressant compounds from biological matrices. The target antidepressants in this method include: Fluoxetine (Prozac®) – A bicyclic antidepressant with pKa of approximately 9.8, widely used for depression treatment with therapeutic levels of 40-450 ng/mL

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MCX and WCX SPE cartridges used for extracting basic drugs in a laboratory workflow

Choosing Between MCX and WCX SPE for Basic Drugs

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Overview of Mixed-Mode Cation Exchange SPE Mechanisms Mixed-mode solid phase extraction represents a sophisticated approach to sample preparation that combines multiple retention mechanisms within a single sorbent. For basic drug analysis, mixed-mode cation exchange (MCX and WCX) cartridges provide superior selectivity and sensitivity compared to traditional reversed-phase materials. These sorbents operate through a dual mechanism:

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