Screening of urine by one-dimensional and pulsed-field gradient two-dimensional 1H NMR spectroscopy: intoxication by propylene glycol in an infant patient

Les nouvelles technologies au service de la toxicologie clinique

“…Au contraire de la CPG-SM, la RMN identifiait le propylene glycol, composé retrouvé dans des formulations médicamenteuses, aussi bien que dans des cosmétiques, des lotions ou des pommades. La mise en évidence de ce composé peut signaler une prise de médicament (80) ou une intoxication aiguë par le propylene glycol (81).…”

Propylene Glycol Is Essential in the LCModel Basis Set for Pediatric 1H-MRS

“…However, infants who have developmentally immature hepatic enzymes, and thus insufficiency in xenobiotic metabolism, may also be at risk to parenteral PG as shown with in vitro high field NMR. 5 The NMR spectra of PG are characterized by methylene protons at 3.4 and 3.6 ppm, coincident with peaks arising from inositol and glycine, respectively, and a methyl doublet at 1.15 ppm. 2,5,7 The doublet, as with the methyl doublet of Lac at 1.30 ppm, undergoes J-modulation and thus is seen to invert at TE = 144 ms.…”

“…5 The NMR spectra of PG are characterized by methylene protons at 3.4 and 3.6 ppm, coincident with peaks arising from inositol and glycine, respectively, and a methyl doublet at 1.15 ppm. 2,5,7 The doublet, as with the methyl doublet of Lac at 1.30 ppm, undergoes J-modulation and thus is seen to invert at TE = 144 ms. If any perturbation of the spectral deconvolution occurs in the presence of PG, it would most likely occur between the PG methylene peaks and resonances of inositol and glycine.…”

Nuclear Magnetic Resonance: Its Utility and Reliability in the Analysis of Pharmaceutical Active Agents/Metabolites in Biological Fluids

“…Regarding its reliability as analytical method in the determination of drugs/metabolites in biological fluids, nuclear magnetic resonance spectroscopy has been utilized to identify and quantify acetaminophen [4], ibuprofen, aspirin, valproate [5], diethyl carbamazepine [6], pseudoephedrine, chloroquine [7] and other pharmaceutical active agents [8]. Such biological fluids studied include but not limited to amniotic fluid [9,10], bile [11], cerebrospinal fluid [12,13], plasma [14][15][16], synovial fluid [17,18] and urine [19].…”