Premium
Stationary phase‐based two‐dimensional chromatography combining both covalent and noncovalent interactions on a single HPLC column
Author(s) -
Lowe Elizabeth A.,
Lu Michael,
Wang Andy,
Cortez Hector,
Ellis Dustin,
Liu XiaoChuan
Publication year - 2006
Publication title -
journal of separation science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.72
H-Index - 102
eISSN - 1615-9314
pISSN - 1615-9306
DOI - 10.1002/jssc.200500257
Subject(s) - chemistry , chromatography , high performance liquid chromatography , monolithic hplc column , hydroquinone , boronic acid , catechol , reversed phase chromatography , column chromatography , hydrophilic interaction chromatography , ribonucleotide , covalent bond , chiral column chromatography , ribonucleoside , two dimensional chromatography , organic chemistry , nucleotide , rna , biochemistry , gene
A new type of 2‐D separation material was synthesized and studied. The material is suitable for 2‐D chromatography utilizing both covalent and noncovalent interactions. The first dimension is boronate affinity chromatography, and the second dimension is RP chromatography (or vice versa ). The polymeric media were prepared using p ‐vinylphenylboronic acid as the functional monomer. This monomer was selected due to the presence of the boronic acid group for the cis ‐diol/boronate interaction in boronate chromatography. Two crosslinkers were evaluated, namely ethylene glycol dimethacrylate and divinylbenzene. The crosslinker content was varied to maximize the polymer strength and the RP performance of the packed column. Several parameters were evaluated to define the optimum for polymer strength and column performance including crosslinker, porogen, initiator, and column‐packing parameters. The polymer‐based HPLC columns were successful in separating phenol, catechol, dimethylphthalate, and hydroquinone under RP conditions, and thus can be used as an RP HPLC column. The columns were also successful in separating catechol and adenosine under boronate chromatography conditions, and thus can be used as a boronate affinity column. Moreover, the two types of chromatography can be performed consecutively on the same column during one complete chromatographic run, making it a 2‐D chromatography. Under these 2‐D conditions, the catechol was separated from a mixture of phenol, catechol, dimethylphthalate, and hydroquinone; the adenosine ribonucleoside was separated from a mixture of adenosine ribonucleoside, adenosine deoxyribonucleoside, and uridine deoxyribonucleoside. This type of single‐column 2‐D HPLC eliminates the requirement of a complex and expensive multidimensional HPLC instrument and provides increased peak capacity for separation.