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Quantitative 1H-NMR analysis of amniotic fluid
Journal of Pharmaceutical and Biomedical Analysis, 1993Ten amniotic fluid samples (36-38 weeks gestation) are analysed by NMR spectroscopy. Of the species identified in the spectra, valine (mean 198 microM: SEM 57 microM), lactate (9.73 mM; 2.05 mM), alanine (689 microM: 115 microM), acetate (6.87 mM: 1.54 mM), citrate (363 microM: 59 microM), glucose (4.54 mM: 1.28 mM) indoxyl-sulphate (n = 4,270 microM),
P E, McGowan +5 more
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1H and13C NMR analysis of some trichothecenes
Archives of Environmental Contamination and Toxicology, 19891H and 13C NMR chemical shifts were determined from the NMR spectra of low concentration solutions of T-2 toxin, T-2 triol, HT-2 toxin, diacetoxyscirpenol, and neosolaniol. Isomerization of neosolaniol was observed to occur in chloroform solution. 1D and 2D 1H and 13C NMR techniques were used in order to determine the structure of the isomerization ...
M, Mesilaakso, M, Moilanen, E, Rahkamaa
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Quantitative analysis of enalapril by 1H NMR spectroscopy in tablets
Journal of Pharmaceutical and Biomedical Analysis, 2005A simple, rapid, accurate and selective 1H NMR method was developed for quantitative determination of enalapril maleate in pharmaceutical preparations. Spectra were determined in D2O, using L-leucine as internal standard. Both synthetic mixtures and commercial dosage forms were assayed, and the results were compared to those obtained using the USP XXIV
Ariana, Zoppi +2 more
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Analysis of membrane lipids by 500 MHz 1H NMR
Analytical Biochemistry, 1989A nondestructive method has been developed for rapid analysis of lipid content of membrane extracts based on high field proton NMR spectroscopy. Lipid extraction is done by stepwise sonication of purified membranes into chloroform:methanol:water mixtures, and 1H spectra are recorded at 35 degrees C on final preparations consisting of at least 1 mg ...
M L, Sparling +3 more
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