Methods for the determination of diphenylamine residues in apples

Allen, John G.; Hall, Kathleen J.

doi:10.1021/jf60228a038

Cited by 12 publications

(1 citation statement)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Methods for determining DPA (47, 68) and ethoxyquin (69) residues have been de scribed. Steam distillation/solvent extraction of apple samples followed by gas chroma tography using a heated-bead nitrogen de tector provides a relatively rapid and simple method for determination of DPA residues (3).…”

Section: Chemical Control Of Scaldmentioning

confidence: 99%

Physiology and Control of Superficial Scald of Apples: A Review

Ingle

D'Souza

1989

horts

View full text Add to dashboard Cite

show abstract

Section: Chemical Control Of Scaldmentioning

confidence: 99%

Physiology and Control of Superficial Scald of Apples: A Review

Ingle

D'Souza

1989

horts

View full text Add to dashboard Cite

show abstract

Post‐harvest application of diphenylamine and ethoxyquin for the control of superficial scald on Bramley's seedling apples

1980

View full text Add to dashboard Cite

Recent changes in the antioxidant regulations in the UK and the need to evaluate the effectiveness of scald control chemicals in the presence of other post-harvest chemicals led to a comparative study of the effects of diphenylamine (DPA) and ethoxyquin on scald development in Bramley's Seedling apples. A range of concentrations (1000-4000 mg litre-l a.i.) of DPA completely controlled scald on Bramley apples kept in controlled atmosphere storage for 241 days; ethoxyquin at equivalent rates was less effective. Only partial control of scald was achieved with 500 mg litre-' a.i. DPA. None of the treatments injured the fruit. Control of scald by 2000 mg litre-' a.i. DPA or ethoxyquin was not impaired by adding thiophanate-methyl (I g litre-l a.i.) or calcium chloride (10 g litre-l) although the measure of control was reduced when both fungicide and calcium chloride were added. Calcium chloride caused lenticel injury which was aggravated by adding ethoxyquin but reduced by incorporating DPA. The concentrations of ethoxyquin and DPA residues on the fruit immediately after treatment were within the limits required by UK legislation (see reference I ) of 3 mg kg-1 and 10 mg kg-*, respectively, even where 4000 mg litre-l had been applied. An initial residue concentration of 2.3 mg kg-1 DPA was associated with complete control of scald. Residue levels, particularly of DPA, declined rapidly during the first month of storage.

show abstract

Methodik zur gemeinsamen Erfassung fungicider Pflanzenbehandlungsmittel auf Citrusfr�chten und Obst mit Hilfe der HPLC und selektiver Detektion

Luckas

1987

Z Lebensm Unters Forch

View full text Add to dashboard Cite

A HPLC-method is described for the determination of diphenyl, o-phenylphenol, thiabendazole, diphenylamine, and ethoxiquin in different fruits (detection limits: 0.1 mg/kg). The compounds are extracted with dichloromethane, and after concentration and filtration steps the determination is carried out by HPLC with selective detection. Chromatographic separation of fungicides is achieved by use of a RP-18 column with a methanolic formic acid buffer as eluent. The working parameters of three different HPLC-detectors (UV-, fluorimetric-, and electrochemical detector) are optimized, and it is shown that residues of the fungicides in plant materials can be determinated at least by two detectors without interferences.

show abstract

Methods for the determination of diphenylamine residues in apples

Cited by 12 publications

References 3 publications

Physiology and Control of Superficial Scald of Apples: A Review

Physiology and Control of Superficial Scald of Apples: A Review

Post‐harvest application of diphenylamine and ethoxyquin for the control of superficial scald on Bramley's seedling apples

Methodik zur gemeinsamen Erfassung fungicider Pflanzenbehandlungsmittel auf Citrusfr�chten und Obst mit Hilfe der HPLC und selektiver Detektion

Contact Info

Product

Resources

About