Quantitative NMRCineolePurityRound robin testNMR is by definition a quantitative spectroscopic tool because the intensity of a resonance line is directly proportional to the number of resonant nuclei (spins). This fact enables, in principle, a precise determination of the amount of molecular structures...
Godecke T, Napolitano JG, Rodriguez-Brasco MF et al (2013) Validation of a generic quantitative (1)H NMR method for natural products analysis. Phytochem Anal 24:581-597Godecke T, Napolitano JG, Rodriguez-Brasco MF, Chen S-N, Jaki BU, Lankin DC, Pauli GF. 2013. Validation of a ...
A proton NMR method was developed by Dr. Bernd Diehl at Spectral Service, Köln, Germany, and accepted by IASC as an analytical method to certify aloe based ingredients and finished products. This presentation will report the validation of the quantitative NMR method according to the AOAC ...
Quantitative Determination and Validation of Four Phenolic Acids in Salvia Miltiorrhiza Bunge using H-1-NMR SpectroscopyqNMRSalvia Miltiorrhiza Bunge... Hou, ZhuoniLiang, ZongsuoLi, YuanyuanSu, FengChen, JipengZhang, XiaodanYang, Dongfeng - 《Current Pharmaceutical Analysis》 被引量: 0发表: 2021年 ...
while the mean and standard deviation described the quantitative variables. For comparisons between study groups, we used the chi-squared test in the case of qualitative variables, and the analysis of variance (ANOVA) in the case of quantitative variables. The level of significance was fixed at ...
An alkaline-forced degradation hydrolytic product of vinpocetine was prepared and characterized by 1H-NMR, FTIR spectroscopy, and MS. Subsequently, a simple, selective, and validated reversed-phase HPLC method was developed for the simultaneous estimation of vinpocetine and folic acid in the presence ...
Pattern recognition and biomarker validation using quantitative 1H-NMR-based metabolomics. The collection of global metabolic data and their interpretation (both spectral and biochemical) using modern spectroscopic techniques and appropriate stat... NJ Serkova,CU Niemann - 《Expert Review of Molecular Diag...
Biological 1H NMR spectroscopy Comp Biochem Physiol 1988 90B: 249–260. CAS Google Scholar Yoshikawa K, Ohsaka A . Nuclear magnetic resonance of rat skin Physiol Chem Phys 1979 11: 185–188. CAS PubMed Google Scholar Yoshikawa K, Ohsaka A . 1H and 13C NMR spectroscopic study of rat ...
Stress urinary incontinence (SUI), the prevalent form of urinary incontinence, significantly impairs women’s quality of life. This study aims to create a visual nomogram to estimate the risk of SUI within one year postpartum for early intervention in high-risk Chinese women. Methods We recruited...
R-factor, free R, and complete cross-validation for dipolar coupling refinement of NMR studies. Derives an expression for the dipolar coupling R-factor which provides a quantitative and interpretable measure of the agreement between observed and calcu... Clore,G.,Marius,... - 《Journal of the...