Abstract:
:A difference spectrophotometric analytical method was developed for the selective determination of p-hydroxybenzoic acid in the presence of its alkyl esters without prior separation. Based on the spectral shift to a shorter wavelength accompanyint carboxyl dissociation, the procedure measures as little as 2% of this acid in mixtures with the alkyl ester preservatives and has an accuracy of 2% mean relative error over the 0.16-12.0 microgram of p-hydroxybenzoic acid/ml range.
journal_name
J Pharm Scijournal_title
Journal of pharmaceutical sciencesauthors
Fink DW,Fink HC,Tolan JW,Blodinger Jdoi
10.1002/jps.2600670629subject
Has Abstractpub_date
1978-06-01 00:00:00pages
837-9issue
6eissn
0022-3549issn
1520-6017pii
S0022-3549(15)42036-2journal_volume
67pub_type
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