title: Selective detection of carboxylic acids, ureas and phenols and semiquantitative determination of citric acid by capillary solid-state spot-tests.
abstract: Solid-state spot-tests for the selective detection of carboxylic acids, ureas and phenols have been developed. Mixtures of p-dimethylaminobenzaldehyde with N-methylurea and of p-dimethylaminobenzaldehyde with phthalic acid are used as reagents. Based on these tests a semiquantitative determination of citric acid is also developed. These tests utilize three properties of the coloured boundary: colour, length and direction of movement. Our work on capillary solid-state spot-tests,(1) has now been extended to some further organic compounds.
authors.affiliation: Chemistry Section, Zakir Husain College of Engineering and Technology, Aligarh Muslim University, Aligarh-202001, India.
authors.forename: M N
authors.initials: MN
authors.lastname: Akhtar
authors.forename: H S
authors.initials: HS
authors.lastname: Rathore
authors.forename: M
authors.initials: M
authors.lastname: Qureshi