Development and validation of a liquid chromatography-tandem mass spectrometry method for the determination of pyridostigmine bromide from guinea pig plasma.
An HPLC/MS/MS method was validated for the low level analysis of pyridostigmine bromide (PB) from guinea pig plasma. An advantage of this strong-cation exchange HPLC/MS/MS method was the enhancement of the ESI-MS signal by providing good retention and good peak shape of PB with a mobile phase of 70% acetonitrile. In addition, the use of 70% acetonitrile in the mobile phase allowed the direct injection of the supernant from the protein precipitated extracted sample. The assay was linear from the range of 0.1 to 50 ng/ml using only 25 microl of sample. The precision and accuracy of the assay was better than 9.1 and 113%, respectively.
Alturas Analytics, Inc., 1282 Alturas Drive, Moscow, ID 83843, USA. sneedham@alturasanalytics.com
Shane R
SR
Needham
Binying
B
Ye
J Richard
JR
Smith
William D
WD
Korte
D000818:Animals; D002800:Cholinesterase Inhibitors / Q000097:blood*; D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D006168:Guinea Pigs; D011729:Pyridostigmine Bromide / Q000097:blood*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D021241:Spectrometry, Mass, Electrospray Ionization / Q000379:methods*
D002800:Cholinesterase Inhibitors; D011729:Pyridostigmine Bromide