Spectrophotometric determination of periodate with salicylaldehyde guanylhydrazone using flow injection. Determination of glycerol in vegetable oils
- 1 January 1989
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in The Analyst
- Vol. 114 (8) , 989-990
- https://doi.org/10.1039/an9891400989
Abstract
Periodate has been determined using flow injection with spectrophotometric detection on the basis of the red colour obtained when salicylaldehyde guanylhydrazone (SAG) and periodate were mixed in a basic medium. The carrier stream was de-mineralised water. The reagent stream was an aqueous SAG solution and another stream contained an ammonia buffer (pH 9.2) solution. The calibration graph was linear between 5 and 50 p.p.m. of periodate when the injection volume was 200 µl. The relative standard deviation (n= 10) was 1.0% and the detection limit, corresponding to a signal to noise ratio of 3, was 0.35 p.p.m. The proposed method was applied to the determination of glycerol in vegetable oils using the Malaprade reaction.Keywords
This publication has 0 references indexed in Scilit: