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Quantitative analysis by nuclear magnetic resonance spectroscopy

Journal Article:

Abstract

Recent papers on the practical quantitative analysis by nuclear magnetic resonance spectroscopy (NMR) are reviewed. Specifically, the determination of moisture in liquid N/sub 2/O/sub 4/ as an oxidizing agent for rocket propulsion, the analysis of hydroperoxides, the quantitative analysis using a shift reagent, the analysis of aromatic sulfonates, and the determination of acids and bases are reviewed. Attention is paid to the accuracy. The sweeping velocity and RF level in addition to the other factors must be on the optimal condition to eliminate the errors, particularly when computation is made with a machine. Higher sweeping velocity is preferable in view of S/N ratio, but it may be limited to 30 Hz/s. The relative error in the measurement of area is generally 1%, but when those of dilute concentration and integrated, the error will become smaller by one digit. If impurities are treated carefully, the water content on N/sub 2/O/sub 4/ can be determined with accuracy of about 0.002%. The comparison method between peak heights is as accurate as that between areas, when the uniformity of magnetic field and T/sub 2/ are not questionable. In the case of chemical shift movable due to content, the substance can be determined by the  More>>
Authors:
Wainai, T; Mashimo, K [1] 
  1. Nihon Univ., Tokyo. Coll. of Science and Engineering
Publication Date:
Apr 01, 1976
Product Type:
Journal Article
Reference Number:
AIX-08-312133; EDB-78-009914
Resource Relation:
Journal Name: Bunseki.; (Japan); Journal Volume: 4
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; NUCLEAR MAGNETIC RESONANCE; ACCURACY; CHEMICAL SHIFT; ERRORS; QUANTITATIVE CHEMICAL ANALYSIS; REVIEWS; SPECTROSCOPY; SPIN-LATTICE RELAXATION; CHEMICAL ANALYSIS; DOCUMENT TYPES; MAGNETIC RESONANCE; RELAXATION; RESONANCE; 400104* - Spectral Procedures- (-1987)
OSTI ID:
7210569
Country of Origin:
Japan
Language:
Japanese
Submitting Site:
INIS
Size:
Pages: 228-233
Announcement Date:

Journal Article:

Citation Formats

Wainai, T, and Mashimo, K. Quantitative analysis by nuclear magnetic resonance spectroscopy. Japan: N. p., 1976. Web.
Wainai, T, & Mashimo, K. Quantitative analysis by nuclear magnetic resonance spectroscopy. Japan.
Wainai, T, and Mashimo, K. 1976. "Quantitative analysis by nuclear magnetic resonance spectroscopy." Japan.
@misc{etde_7210569,
title = {Quantitative analysis by nuclear magnetic resonance spectroscopy}
author = {Wainai, T, and Mashimo, K}
abstractNote = {Recent papers on the practical quantitative analysis by nuclear magnetic resonance spectroscopy (NMR) are reviewed. Specifically, the determination of moisture in liquid N/sub 2/O/sub 4/ as an oxidizing agent for rocket propulsion, the analysis of hydroperoxides, the quantitative analysis using a shift reagent, the analysis of aromatic sulfonates, and the determination of acids and bases are reviewed. Attention is paid to the accuracy. The sweeping velocity and RF level in addition to the other factors must be on the optimal condition to eliminate the errors, particularly when computation is made with a machine. Higher sweeping velocity is preferable in view of S/N ratio, but it may be limited to 30 Hz/s. The relative error in the measurement of area is generally 1%, but when those of dilute concentration and integrated, the error will become smaller by one digit. If impurities are treated carefully, the water content on N/sub 2/O/sub 4/ can be determined with accuracy of about 0.002%. The comparison method between peak heights is as accurate as that between areas, when the uniformity of magnetic field and T/sub 2/ are not questionable. In the case of chemical shift movable due to content, the substance can be determined by the position of the chemical shift. Oil and water contents in rape-seed, peanuts, and sunflower-seed are determined by measuring T/sub 1/ with 90 deg pulses.}
journal = {Bunseki.; (Japan)}
volume = {4}
journal type = {AC}
place = {Japan}
year = {1976}
month = {Apr}
}