title: Analysis of 6R- and 6S-tetrahydrobiopterin and other pterins by reversed-phase ion-pair liquid-chromatography with fluorimetric detection by post-column sodium nitrite oxidation.
abstract: A rapid and sensitive reversed-phase ion-pair liquid chromatographic system with fluorimetric detection by post-column sodium nitrite oxidation was established for measuring six pterin compounds (6R-5,6,7,8-tetrahydrobiopterin, 6S,5,6,7,8-tetrahydrobiopterin, 7,8-dihydrobiopterin, biopterin, pterin and D-neopterin). The coefficients of variation for these pterins were 0.705-3.714%, and the minimum detectable amount was ca. 10-20 pg at a signal-to-noise ratio of 3. A linear detector response was also verified. The concentrations of the pterin compounds in rat tissues were measured by the described method. Furthermore, by means of brain microdialysis, the output of pterin compounds from rat striatum was detected. Therefore, these results demonstrate that this system can be applied to analyses not only of various rat tissues but also of dialysates collected in vivo.
authors.affiliation: Suntory Institute for Biomedical Research, Osaka, Japan.
authors.forename: Y
authors.initials: Y
authors.lastname: Tani
authors.forename: T
authors.initials: T
authors.lastname: Ohno
mesh_terms: D000818:Animals; D001708:Biopterins / Q000031:analogs & derivatives* / Q000032:analysis; D001923:Brain Chemistry; D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D003342:Corpus Striatum / Q000737:chemistry; D007477:Ions; D008099:Liver / Q000737:chemistry; D008297:Male; D017551:Microdialysis; D010084:Oxidation-Reduction; D011622:Pterins / Q000032:analysis*; D051381:Rats; D011916:Rats, Inbred F344; D015203:Reproducibility of Results; D012977:Sodium Nitrite / Q000737:chemistry; D013050:Spectrometry, Fluorescence; D013447:Sulfites / Q000032:analysis; D013696:Temperature
chemical_list: D007477:Ions; D011622:Pterins; D013447:Sulfites; D001708:Biopterins; C003402:sapropterin; D012977:Sodium Nitrite; C025026:sodium sulfite