Pesticide Residues, Determination of Diphenylamine Residues on Apples

Bruce, Robert; Howard, James W.; Zink, Julius

doi:10.1021/jf60090a007

Cited by 9 publications

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“…A number of methods based on spectrophotometric procedures have been described for the determination of diphenylamine residues. Yatsu (1956) and Harvey (1958) utilized the blue oxidation product produced with vanadium pentaoxide in sulfuric acid while Bruce et al (1958) coupled diphenylamine with diazotized 2,4-dinitroaniline. As these methods appeared to lack the selectivity and sensitivity required, a gas chromatographic technique was sought.…”

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Methods for the determination of diphenylamine residues in apples

Allen¹,

Hall²

1980

J. Agric. Food Chem.

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Two methods for the determination of diphenylamine residues in apple peel were devised and used during a fruit storage experiment. One was based on extraction in a Soxhlet apparatus and formation of the fluorobutyryl derivative for electron-capture gas chromatographic determination; the second method used steam distillation and direct determination of diphenylamine with a nitrogen-sensitive thermionic gas chromatographic detector. The latter method, after correction for recovery losses, gave residue levels ca. one-third higher during the 118 days of the storage experiment.phase and column chromatography on alumina or magnesium oxide/Celite, but none of these were successful. A

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confidence: 99%

Methods for the determination of diphenylamine residues in apples

Allen¹,

Hall²

1980

J. Agric. Food Chem.

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Determination of NN′‐diphenyl‐p‐phenylenediamine (DPPD) in fat and other biological materials

1960

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A general method is presented for the determination of DPPD in a variety of biological materials such as feeds, chicken fat and organs, serum and egg yolk, based on extraction with light petroleum, purification of the extract and measurement of the red colour formed with 72% sulphuric acid containing a little nitric acid. A study has also been made of some relevant properties of DPPD and its quinoid oxidation product, NN′‐diphenyl‐p‐quinonediimine (“quinone‐dianil”, QDA).

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The utilization of infrared and ultraviolet spectrophotometric procedures for assay of pesticide residues

Blinn¹,

Günther²

1963

Reviews of Environmental Contamination and Toxicology

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Pesticide Residues, Determination of Diphenylamine Residues on Apples

Cited by 9 publications

References 0 publications

Methods for the determination of diphenylamine residues in apples

Methods for the determination of diphenylamine residues in apples

Determination of NN′‐diphenyl‐p‐phenylenediamine (DPPD) in fat and other biological materials

The utilization of infrared and ultraviolet spectrophotometric procedures for assay of pesticide residues

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