scholarly journals Syntheses of diastereoisomers of the recent pyrethroids, fenvalerate (S-5602) and cypermethrin (NRDC-149)from (-)-3-phenoxy-mandelic acid and determination of their absolute configurations.

1978 ◽  
Vol 42 (4) ◽  
pp. 895-896 ◽  
Author(s):  
Koh-ichi AKETA ◽  
Nobuo OHNO ◽  
Nobushige ITAYA ◽  
Hirosuke YOSHIOKA
Keyword(s):  
Mandelic Acid

Nuclear Magnetic Resonance Analysis of Pharmaceuticals. IX. Methenamine and Methenamine Mandelate in Tablets

1973 ◽  
Vol 56 (3) ◽  
pp. 669-673
Author(s):  
John W Turczan ◽  
Bruce A Goldwitz
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Maleic Acid ◽  
Mandelic Acid ◽  
Internal Standard ◽  
Solvent System ◽  
Nuclear Magnetic Resonance Analysis ◽  
Resonance Analysis ◽  
Nuclear Magnetic

Abstract An NMR procedure is described by which methenamine and mandelic acid are simultaneously determined in methenamine and methenamine mandelate tablets. Maleic acid was chosen as the internal standard and dimethylformamide-acetone-acetonitrile (10+25+65) as the solvent. The solvent system was selected to resolve the problems of solubility of methenamine and its salt with mandelic acid, overlapping of the resonance signals of the components, and potential decomposition of methenamine. Known standard and commercial preparations were analyzed and the results were compared to those of official USP and NF procedures. The NMR technique, when applied to the determination of methenamine and methenamine mandelate in tablets, is rapid, simple, and specific and can provide an assay with an accuracy of 1–2%.

scholarly journals DETERMINATION OF URINARY 3,4-DIHYDROXY-MANDELIC ACID (DOMA)

1962 ◽  
Vol 12 (2) ◽  
pp. 163-165 ◽  
Author(s):  
HIROSHI MIYAKE ◽  
MASATOSHI MIYAZAKI ◽  
REIJI IMAIZUMI
Keyword(s):  
Mandelic Acid

scholarly journals The determination of 3-methoxy 4-hydroxy mandelic acid in urine

1962 ◽  
Vol 15 (4) ◽  
pp. 388-389 ◽  
Author(s):  
R. J. Georges ◽  
N. A. Small
Keyword(s):  
Mandelic Acid
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