Kinetic - Spectrophotometric Determination of Trace Amounts of Resorcinol Based on its Inhibitory Effect on the Formaldehyde Catalyzed Reaction between Bromate and Neutral Red
作者:
H. Parham,
N. Pourreza,
S. Cheraghi,
期刊:
Analytical Letters
(Taylor Available online 1999)
卷期:
Volume 32,
issue 9
页码: 1917-1926
ISSN:0003-2719
年代: 1999
DOI:10.1080/00032719908542942
出版商: Taylor & Francis Group
关键词: Kinetic;Spectrophotometry;Resorcinol;Formaldehyde
数据来源: Taylor
摘要:
A novel sensitive, simple and fast kinetic method for the determination of trace amounts of resorcinol (0.50 — 3.00 μg ml−1) based on its inhibitory effect on the formaldehyde catalyzed oxidation reaction of neutral red by bromate ion in acidic media is reported. The reaction is monitored spectrophotometrically by measuring the decrease in the absorbance of neutral red in an inhibited reaction at 524 nm using a variable - time method. The detection limit is 0.38 μg ml−1and the relative standard deviation of ten replicate measurements for 1 μg ml−1of resorcinol is 4.2%. The procedure was successfully applied to the determination of resorcinol in resorcinol - S topical cream.
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