Determination of Histamine in Human Serum/Plasma by SPE and HILIC LC-MS-MS
The Column
Reversed-phase HPLC analysis of histamine has been a challenge in the past due to the high polarity and poor retention. HILIC (hydrophilic interaction chromatography) offers a potential solution because of high polar analyte retention without the need of strong ion-pair reagents, which are not compatible with mass spectrometry (MS) detection and can cause signal suppression.
Histamine is a low-molecular-weight amine that plays several critical physiological roles, most notably in mediating the inflammation response. Reversed-phase HPLC analysis of histamine has been a challenge in the past due to the high polarity and poor retention. HILIC (hydrophilic interaction chromatography) offers a potential solution because of high polar analyte retention without the need of strong ion-pair reagents, which are not compatible with mass spectrometry (MS) detection and can cause signal suppression. Sample concentration and cleanup with solid phase extraction (SPE) further enhances the process and significantly increases throughput.
HILIC Peptide Retention Times Predicted Using New Approach
October 29th 2024Manitoba Centre for Proteomics and Systems Biology scientists produced a new means of predicting peptide retention times for hydrophilic interaction liquid chromatography (HILIC) at acidic pH in formic-acid based eluents.
Systematic Evaluation of HILIC Stationary Phases for MS Characterization of Oligonucleotides
Hydrophilic interaction chromatography–mass spectrometry (HILIC-MS) offers a flexible and efficient alternative to ion-pairing reversed-phase liquid chromatography (IP-RPLC) for oligonucleotide analysis, with column selectivity and mobile phase pH being key factors in optimizing retention and detection.
