CSA chiral method

[michael.k raj]

Dear chromatographers,
Is any reference/method for the determination of chiral purity of camphor sulfonic acid (and its enantiomer).
Detection definitely would be a difficulty.
Owing to its polar nature, retention in RPLC and elution in NPLC,is difficult .
Though rotation will give some info',definitely at 0.1% level that may not be suitable............
Hooooooops! Can any one throw some light?
But definitely I need to know the isomer at lower level
Thanx in advance
-Raj

[michael.k raj]

Ha.....v,
No reply?

[michael.k raj]

I Really wonder how this problem has not drawn any attention,is that like nobody encountered with this or a similar kind of problem?
Regards
Raj

[yangz00g]

If somebody has the experience, they will help you. If no response, you know what it means.

An article in the new issue of LC-GC might give you some idea: a relatively new strategy, called aqueous normal phase (ANP), seems good for ploar acids like your target:

http://www.lcgcmag.com/lcgc/article/art ... ?id=310847