CPC G01N 33/6815 (2013.01) [G01N 21/33 (2013.01); G01N 21/64 (2013.01); G01N 33/52 (2013.01); C07C 309/65 (2013.01); C07C 309/73 (2013.01)] | 20 Claims |
1. An analytical method comprising:
contacting a sample containing D-cysteine, L-cysteine, or a mixture thereof with a probe, wherein said contacting is carried out under conditions effective to result in double ipso-substitution of any cysteine present in the sample; and
determining, based on any double ipso-substituted cysteine that forms, the absolute configuration of D/L-cysteine in the sample, and/or the enantiomeric composition of cysteine in the sample, and/or the concentration of total cysteine in the sample.
|