Simultaneous determination of cysteine sulfinic acid and cysteic acid in rat brain by high-performance liquid chromatography

✍ Scribed by Shuji Ida; Kinya Kuriyama

• Publisher: Elsevier Science
• Year: 1983
• Tongue: English
• Weight: 443 KB
• Volume: 130
• Category: Article
• ISSN: 0003-2697
• DOI: 10.1016/0003-2697(83)90654-1

✦ Synopsis

A sensitive and specific assay method for cysteine sulfinic acid (CSA) and cysteic acid (CA) using high-performance liquid chromatography has been developed. The method includes postcolumn derivatization of various amino acids with o-phthalaldehyde in the presence of 2-mercaptoethanol. The column packed with cation-exchange resin (ISC-07/S1504, Shimadzu Scientific Instruments, Inc., Kyoto, Japan) was used for obtaining general separation of amino acids except CSA and CA, while the separation of CSA and CA was achieved using a strong-base anion exchange (ISA-07/S2504, Shimadzu Scientific Instruments) column. The fluorescence peak area for CSA was linear between 20 pmol and 5 nmol, whereas that for CA was 10 pmol to 5 nmol. The regional distribution of CSA, CA, and other amino acids in the rat brain was studied using this new assay method.