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New and sensitive spectrophotometric methods for the determination of cardol-an agriculture by-product

Masoumeh Moghimi, Akheel Ahmed Syed

Cardol is a phenolic compound found in cashew(Anacardiumoccidentale) shell liquid(CNSL), which is a by-product of cashew processing industry. It holds considerable promise for use because of its large availability in tropical areas, low cost, biodegradability and structural characteristics. Three simple, sensitive, selective, rapid and reliable spectrophotometric methods for the determination of cardol, an agriculture by-product have been developed. MethodAdescribes the reaction of cardol with iron(III) and subsequent reaction with ferricyanide to yield a Prussian Blue productwithmaximumabsorption at 760nm.Method B is based on the interaction of cardol with fast red B salt(FRS) at pH 9.6 to produce an orange colored product having maximum absorbance at 440nm. In method C a study was made of the application of diazotization-coupling spectrophotometric technique for the determination of cardol, using metaclopramide (MCP) and sulphanilic acid in alkaline medium to produce a yellow colored product havingmaximumabsorption at 430nm. These methods obey BeerÂ’s law. Ten independent anions and cations tried with these methods did not interfere.