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Two procedures for applying 13C n.m.r. spectroscopy to the quantitative analysis of the C1, C1a, and C2 components of gentamicin sulphate samples are described. One is based on the use of calibration plots of peak height ratios of analyte to standard (dioxan) resonance intensities recorded under conditions of full relaxation, the other upon a steady-state experiment and the use of weighting factors. Spectrometer operating conditions are discussed, and the need for measurement of longitudinal relaxation time (T1) data described. Results for seven commercial samples are given and comparisons made between the two n.m.r. methods and an h.p.l.c. procedure in terms of accuracy, specificity and convenience.
J Kountourellis, and
R T Parfitt, and
A F Casy
January 1977,
Carbohydrate research,
J Kountourellis, and
R T Parfitt, and
A F Casy
April 1980,
International journal of peptide and protein research,
J Kountourellis, and
R T Parfitt, and
A F Casy
December 2010,
Chromatographia,
J Kountourellis, and
R T Parfitt, and
A F Casy
October 1991,
International journal of biological macromolecules,
J Kountourellis, and
R T Parfitt, and
A F Casy
September 1983,
Carbohydrate research,
J Kountourellis, and
R T Parfitt, and
A F Casy
January 1972,
Chemische Berichte,
J Kountourellis, and
R T Parfitt, and
A F Casy
June 1978,
The Journal of pharmacy and pharmacology,
J Kountourellis, and
R T Parfitt, and
A F Casy
October 2012,
Journal of agricultural and food chemistry,
J Kountourellis, and
R T Parfitt, and
A F Casy
November 1973,
Carbohydrate research,
J Kountourellis, and
R T Parfitt, and
A F Casy
July 1976,
Pharmazie in unserer Zeit,
