1999
DOI: 10.1021/ac981422i
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Concentration Measurement by Proton NMR Using the ERETIC Method

Abstract: The ERETIC method (Electronic REference To access In vivo Concentrations) provides a reference signal, synthesized by an electronic device, which can be used for the determination of absolute concentrations. The results presented here demonstrate the accuracy and precision of the method in the case of (1)H high resolution NMR. Five tubes were filled with D(2)O solutions of trimethylamine hydrochloride (TMA) 3.84 mM and sodium lactate at concentrations ranging from 5.25 to 54.11 mM. Results obtained with the ER… Show more

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Cited by 455 publications
(365 citation statements)
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“…In our study, both the ERETIC and TSP methods of HR MAS MRS quantification were less accurate than Akoka et al described. The smaller relative errors of quantification by standard HR MRS (20) is assumed to be due to the higher sensitivity of standard HR MRS probes and the higher concentrations of the solutions under study. Additionally, the rf-field of HR MAS probes can be inhomogeneous, as demonstrated by Ziarelli et al (22).…”
Section: Results and Discussion Calibrationmentioning
confidence: 99%
“…In our study, both the ERETIC and TSP methods of HR MAS MRS quantification were less accurate than Akoka et al described. The smaller relative errors of quantification by standard HR MRS (20) is assumed to be due to the higher sensitivity of standard HR MRS probes and the higher concentrations of the solutions under study. Additionally, the rf-field of HR MAS probes can be inhomogeneous, as demonstrated by Ziarelli et al (22).…”
Section: Results and Discussion Calibrationmentioning
confidence: 99%
“…The concentrations in the chloroform samples listed in Table 1 were determined with ERETIC (Electronic Reference to assess in vivo Concentration) [25] using samples of menthol in chloroform as a reference.…”
Section: Methodsmentioning
confidence: 99%
“…In both NMR analyses, the integrity of the cells during the incubation was checked by microscopic observation. Measurements were recorded at 25°C with an ERETIC method, which provides an electronically synthesized reference signal (47). Before each experiment, phase of ERETIC peak was precisely adjusted and, after acquisition, resonances of obtained spectra were integrated and results were expressed relative to ERETIC peak integration.…”
Section: Nmr Analysis Of Excreted End Products From Glucose and Threomentioning
confidence: 99%