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Chiral Columns

100Å - Analytical Columns

The chiral phases, DNB-LEU or DNB-PHGLY, are prepared from N-3,5-dinitrobenzoyl protected derivatives of leucine or phenylgylcine. These phases are available in both the D- or the L- enantiomers of the amino acids.

The unique feature of amino-acid-derived chiral phases is that the elution order of enantiomers in the sample is dependent on the D- or L- chirality of the bonded amino acid. Therefore, the order of elution can be controlled by appropriate selection of stationary phase. This can be of tremendous advantage for those samples which contain a large excess of one enantiomer, in which case it is desirable to have the minor component elute first.

Many racemic acids and amines which cannot be resolved in their native form can be easily converted to amides or anilides which can be resolved by an amino-acid-derived chiral phase. The following compounds are candidates for amino-acid-derived chiral phases:

Aromatic alcohols	Aryl substituted phthalides
Aromatic amino acids	Aryl substituted lactams
Aromatic amino alcohols	Aryl substituted succinamides
Aromatic thiols	Aryl substituted hydantoins
Aromatic arnines	Aryl acetamides
Aromatic sulfoxides	Hydroxy-aryl phosphonates
Mandelic acid analogs

			4.6mm id	4.0mm id	3.0mm id	2.0mm id
Column Name	Column Length	Particle Size	Cat. No.	Cat. No.	Cat. No.	Cat. No.
D-DNB-LEU	50 100 150 250	5 5 5 5	A7725-D-LEU A6725-D-LEU A5725-D-LEU A3725-D-LEU	A7625-D-LEU A6625-D-LEU A5625-D-LEU A3625-D-LEU	A7525-D-LEU A6525-D-LEU A5525-D-LEU A3525-D-LEU	A7425-D-LEU A6425-D-LEU A5425-D-LEU A3425-D-LEU
L-DNB-LEU	50 100 150 250	5 5 5 5	A7725-L-LEU A6725-L-LEU A5725-L-LEU A3725-L-LEU	A7625-L-LEU A6625-L-LEU A5625-L-LEU A3625-L-LEU	A7525-L-LEU A6525-L-LEU A5525-L-LEU A3525-L-LEU	A7425-L-LEU A6425-L-LEU A5425-L-LEU A3425-L-LEU
D-DNB-PHGLY	50 100 150 250	5 5 5 5	A7725-D-PHGLY A6725-D-PHGLY A5725-D-PHGLY A3725-D-PHGLY	A7625-D-PHGLY A6625-D-PHGLY A5625-D-PHGLY A3625-D-PHGLY	A7525-D-PHGLY A6525-D-PHGLY A5525-D-PHGLY A3525-D-PHGLY	A7425-D-PHGLY A6425-D-PHGLY A5425-D-PHGLY A3425-D-PHGLY
L-DNB-PHGLY	50 100 150 250	5 5 5 5	A7725-L-PHGLY A6725-L-PHGLY A5725-L-PHGLY A3725-L-PHGLY	A7625-L-PHGLY A6625-L-PHGLY A5625-L-PHGLY A3625-L-PHGLY	A7525-L-PHGLY A6525-L-PHGLY A5525-L-PHGLY A3525-L-PHGLY	A7425-L-PHGLY A6425-L-PHGLY A5425-L-PHGLY A3425-L-PHGLY

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