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Showing 1-30 of 38 results
Two Distinct Sample Prep Approaches to Overcome Matrix Effect in LC/MS of Serum or Plasma Samples
This article highlights the impact that sample matrix effects can have on LC/MS response and discusses two novel approaches to reduce it.
Solid Phase Extraction: Reversed-Phase Methodology
Reversed-phase interaction will retain most molecules with hydrophobic character; it is very useful for extracting analytes that are very diverse in structure within the same sample.
Impact of Mobile Phase Additives on LC-MS Sensitivity, Demonstrated using Spice Cannabinoids
This study demonstrates the impact of various mobile phase modifiers on the separation; formate modifiers outperform acetate in terms of MS signals (or sensitivity) and chromatographic resolution.
Method Optimization for LC-MS Analysis of Vitamin D Metabolite Critical Pairs in Serum
Novel sample prep technique coupled with the unique selectivity of the Ascentis Express F5 column enables a fast and simplified bioanalytical method for associated vitamin D metabolites.
Method Optimization for LC-MS Analysis of Vitamin D Metabolite Critical Pairs in Serum
Using HybridSPE-Phospholipid, Ascentis Express, and Other LC-MS Workflow Components
Quick, Sensitive LC/MS/MS Analysis of Aflatoxins in Cannabis
Analyte recovery values from spiked cannabis extracts ranged from 102 to 127% with RSD below 12% for 3 replicates. Excellent recovery values were even observed for Aflatoxins B2 and G2 which were spiked at a low level of 6.1 ppb.
Replace Classical Liquid-Liquid Extractions with EXtrelut® NT
Simplify your liquid-liquid extractions with our emulsion-free supported-liquid extraction (SLE) single step solution.
Vitamin D epi-Metabolites Separated with HybridSPE-Phospholipid
This Sigma-Aldrich article continues to detail new methodology for the analysis of Vitamin D metabolites using HybridSPE-Phospholipid technology.
QuEChERS Cleanup and Analysis of Veterinary Drugs in Milk by LC/MS/MS
Use QuEChERS methods to analyze samples of milk for veterinary drugs.
The Extraction of Amphetamine and Related Drugs using Molecularly Imprinted Polymer SPE
The Extraction of Amphetamine and Related Drugs using Molecularly Imprinted Polymer SPE
Solid Phase Extraction for Aflatoxin Analysis
Supel Tox AflaZea SPE improves analyte recovery with less sample volume, while HPLC confirms effective elimination of interferences.
Determination of Formaldehyde and Acetaldehyde in Air Using DNPH Cartridges and Automated On-Line Desorption Followed by HPLC
Carbonyl compounds react within the DNPH cartridge to form immobilized hydrazones, which can be subjected to automated desorption and HPLC analysis with UV detection.
Simplified LC-MS/MS for Herbicides in Cereals
Glyphosate analysis: LC-MS/MS method with Supel™ Carbon LC U/HPLC column for stability and retention.
Solid Phase Extraction (SPE) Overview
Solid phase extraction method extracts, partitions, and adsorbs components from liquid samples onto stationary phase resin.
Ion-Exchange SPE Methodology
Solid Phase Extraction Microbiology requires polar analytes introduced in a non-polar sample or mobile phase.
Pesticide Analysis in Turmeric by LC/MS/MS & GC/MS/MS
Dual-layer cartridge achieves efficient SPE clean-up for challenging pesticide residue testing in turmeric and spices.
Fast Vitamin D Metabolite Analysis
Vitamin D deficiency affects bone health, highlighting its vital role in calcium absorption and bone growth.
Analysis of Pesticide Residues in Pistachios Using QuEChERS Extraction and Cleanup with Supel™ QuE Z-Sep+
Pistachios 45% fat complicates pesticide analysis. But Z-Sep+ sorbent cleanup after QuEChERS extraction can reduce background for reliable results.
HybridSPE®-Phospholipid Technology
SPE technology uses phospholipid retention, interacting with zirconia ions, for selective phospholipid and protein removal.
Quantitative Analysis of PFAS in Drinking Water by LCMS
Simultaneous determination of 27 PFAS chemical compounds after enriching the water samples with SPE using a Supelclean® ENVI-WAX weak anion exchange tube.
LC/MS/MS Method for Determination of Glyphosate, AMPA, and Glufosinate in Cereals
Glyphosate and related compounds are measured in oatmeal and infant cereal using ion-exchange polymer-based particles for HPLC and SPE. Low level detection was obtained.
Solid Phase Extraction: Ion Exchange Methodology
SPE retention mechanism in this case is based on the electrostatic attraction of charged functional groups of the analyte(s) to oppositely charged functional groups on the sorbent.
Ion Exchange Methodology
Ion Exchange Methodology in Sold Phase Extraction, Counter Ion Selectivity & Ion Exchange and the basic steps.
Supel™-Select Polymeric SPE
Supel-Select HLB SPE - a hydrophilic modified styrene based polymer developed for the solid phase extraction of a broad range of compounds from aqueous samples.
HybridSPE-Phospholipid Technology
This Sigma-Aldrich article discusses how the HybridSPE-Phospholipid Technology works and how the phospholipids are removed.
LC-MS Analysis of PFAS Compounds in EPA Method 533 using Supelclean™ ENVI-WAX™ SPE
Learn how method EPA 533 is used for sample collection and preparation, featuring Supelclean™ ENVI-WAX™ SPE cartridges for LC-MS analysis on an Ascentis® Express PFAS HPLC Column.
Sample Cleanliness Using BioSPME
Learn about Supel™ BioSPME C18 96-pin tool to prepare a clean sample with minimal matrix effects for an LC-MS/MS analysis from human plasma and its comparison with acetonitrile-based precipitation.
LC-MS Analysis of Serum for a Wide Analyte Range Using a Novel HLB SPE Phase
Analysis of 20 pharmaceutical compounds in calf serum using Supel™ Swift HLB SPE cartridge for cleanup and LC-MS determination and another commercially available HLB cartridge for comparison.
LC-MS Analysis of Warfarin™ in Plasma Samples
LC-MS analysis of Warfarin demonstrates its potential in clinical laboratories for accurate plasma measurements.
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