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A method for the quantitative determination of 1-naphthaleneacetic acid, 1-naphthalenylacetylaspartic acid, and beta -D-glucose 1-(1-naphthalene)acetate in grapes



A method for the quantitative determination of 1-naphthaleneacetic acid, 1-naphthalenylacetylaspartic acid, and beta -D-glucose 1-(1-naphthalene)acetate in grapes



Journal of Agricultural and Food Chemistry 31(2): 286-288



The sample is blended with ethyl acetate and refluxed for 1 hour. An aliquot is evaporated to dryness and hydrolysed for 90 minutes in 6 N HCl. The hydrolysed sample is diluted with water and partitioned into dichloromethane which is removed in vacuo (40-50 deg C). The sample is redissolved in diethyl ether and partitioned into 0.2 M K2HPO4 which is acidified with 5 N H2SO4 and the NAA is partitioned into CHCl3 and analysed by high-performance liquid chromatography and fluorescence detection. Field-treated grapes (four replications) sprayed with 100 and 200 p.p.m. NAA had average residues of 0.23 and 0.47 p.p.m. with recoveries ranging from 76.1 to 95.5% at a method sensitivity of 0.05 p.p.m.

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Accession: 001038411

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PMID: 6853855



Related references

A method for the quantitative determination of 1-naphthaleneacetic acid, 1-naphthalenylacetylaspartic acid, and b- D-glucose 1-(1-naphthalene)acetate in grapes. Journal of Agricultural and Food Chemistry 31: 6-8, 1983

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