Bis(trimethylsilyl)carbodiimid

Quantitation of Oxycodone in Blood and Urine Using Gas Chromatography-Mass Spectrometry (GC-MS)

are fortified with deuterated internal standard and a five-point calibration curve is constructed. Specimens are extracted using mixed-mode solid phase extraction and derivatized with N,O-bis(trimethylsilyl)trifluoroacetamide (BSTFA) producing trimethylsilyl

Quantitation of Homovanillic Acid (HVA) and Vanillylmandelic Acid (VMA) in Urine Using Gas Chromatography-Mass Spectrometry (GC/MS)

and VMA from the acidified samples, and the extract is dried. The residue is treated with bis-(trimethylsilyl)trifluoroacetamide (BSTFA), 1% trimethylchlorosilane (TMCS), and pyridine to prepare trimethylsilyl derivatives of HVA and VMA. The derivatized

Quantifying 13C-labeling in Free Sugars and Starch by GC-MS

(GC-MS). Sugars are derivatized with N,O -bis(trimethylsilyl) trifluoroacetamide (BSTFA) into their Si(CH3 )3 derivatives. Electronic and chemical ionizations are used to obtain suitable fragments for metabolic flux analysis (MFA). Unique fragments