title: Simultaneous high-performance liquid chromatography-tandem mass spectrometry (HPLC-MS-MS) analysis of cyanide and thiocyanate from swine plasma.
abstract: An analytical procedure for the simultaneous determination of cyanide and thiocyanate in swine plasma was developed and validated. Cyanide and thiocyanate were simultaneously analyzed by high-performance liquid chromatography tandem mass spectrometry in negative ionization mode after rapid and simple sample preparation. Isotopically labeled internal standards, Na(13)C(15)N and NaS(13)C(15)N, were mixed with swine plasma (spiked and nonspiked), proteins were precipitated with acetone, the samples were centrifuged, and the supernatant was removed and dried. The dried samples were reconstituted in 10 mM ammonium formate. Cyanide was reacted with naphthalene-2,3-dicarboxaldehyde and taurine to form N-substituted 1-cyano[f]benzoisoindole, while thiocyanate was chemically modified with monobromobimane to form an SCN-bimane product. The method produced dynamic ranges of 0.1-50 and 0.2-50 μM for cyanide and thiocyanate, respectively, with limits of detection of 10 nM for cyanide and 50 nM for thiocyanate. For quality control standards, the precision, as measured by percent relative standard deviation, was below 8 %, and the accuracy was within ±10 % of the nominal concentration. Following validation, the analytical procedure successfully detected cyanide and thiocyanate simultaneously from the plasma of cyanide-exposed swine.
authors: Department of Chemistry and Biochemistry, South Dakota State University, Avera Health and Science Center 131, Box 2202, Brookings, SD, 57007, USA.
authors: Raj K
authors: RK
authors: Bhandari
authors: Erica
authors: E
authors: Manandhar
authors: Robert P
authors: RP
authors: Oda
authors: Gary A
authors: GA
authors: Rockwood
authors: Brian A
authors: BA
authors: Logue
mesh_terms: D000818:Animals; D001774:Blood Chemical Analysis / Q000379:methods*; D002851:Chromatography, High Pressure Liquid; D003486:Cyanides / Q000097:blood*; D004355:Drug Stability; D057230:Limit of Detection; D013058:Mass Spectrometry; D015394:Molecular Structure; D011786:Quality Control; D015203:Reproducibility of Results; D013552:Swine; D013861:Thiocyanates / Q000097:blood*; D013997:Time Factors
chemical_list: D003486:Cyanides; D013861:Thiocyanates; C031760:thiocyanate