Abstract
It is shown that o-carboxyphenylglyoxal, which is converted from ninhydrin by alkali, produces a chemiluminescent lucigenin reaction under alkaline conditions when with reacted with guanidino compounds. It is also demonstrated that phenylglyoxal, which is a model compound of o-carboxyphenylglyoxal, produces a strong chemiluminescent lucigenin reaction under alkaline conditions when reacted with guanidino compounds. Moreover, ESR spectra showed the presence of 5,5-dimethyl-1-pyrroline N-oxide (DMPO)-spin adducts of superoxide anions in a mixture of phenylglyoxal and guanidino compounds under alkaline conditions. It was confirmed that the superoxide anions were generated by the reaction of phenylglyoxal with guanidino compounds under alkaline conditions, thereby causing lucigenin chemiluminescence. The chemiluminescent reaction of lucigenin in a mixture of phenylglyoxal and the guanidino compounds was applied to HPLC for guanidino compounds. The present chemiluminescence-HPLC system has a 2-fold greater sensitivity than chemiluminescence-HPLC using ninhydrin. Arginine, guanidine and methylguanidine were detected in serum from a hemodialysis patient with chronic renal failure.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
