Method for determining ethylenebis(dithiocarbamate) residues on food crops as bis(trifluoroacetamido)ethane

Newsome, W Harvey

doi:10.1021/jf60195a036

Cited by 21 publications

(17 citation statements)

References 10 publications

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“…Various methods have been developed for the analysis of the dithiocarbamates, such as spectrophotometry (Keppel, 1969(Keppel, , 1971, gas chromatography (Spiegelenberg et al, 1979;Newsome, 1974), and liquid chromatography (Gustafsson and Thompson, 1981; Smith et al, 1980). Because of the chemical properties mentioned, most of these methods are based on degradation of the dithiocarbamates prior to detection.…”

Section: Introduction Thiram Zinebmentioning

confidence: 99%

Improved sample pretreatment of the carbon disulfide evolution method for the determination of dithiocarbamate residues in lettuce

Vuik¹,

Dinter²,

Vos³

1992

J. Agric. Food Chem.

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Section: Introduction Thiram Zinebmentioning

confidence: 99%

Improved sample pretreatment of the carbon disulfide evolution method for the determination of dithiocarbamate residues in lettuce

Vuik¹,

Dinter²,

Vos³

1992

J. Agric. Food Chem.

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“…False positives for EBDC with this method may arise from dialkyldithiocarbamates and from thiuram sulfides, which can also generate carbon disulfide. For confirmation of the identity of EBDC residues, the method of Newsome (1974) can be used or the EBDC can be cooked t o yield ETU. The cooking procedure (sec.…”

Section: Confirmation Of Identity Of Ebdc Residuesmentioning

confidence: 99%

The Results and Evaluation of a Limited Survey for Ethylenebisdithiocarbamate and Ethylenethiourea Residues in Correlated Raw and Canned Spinach and Tomato Samples

Trotter

Pardue

1982

Journal of Food Safety

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Results are presented for a limited survey performed in 1978 for residues of ethylenebisdithiocarbamate (EBDC) fungicides and ethylenethiourea (ETU) in raw and canned spinach and tomato samples (12 samples each of the raw and 12 each o f the canned commodities). Correlated samples of each commodity were obtained by batch sampling the canned commodity and the corresponding raw commodity. Most o f the tomato sample analyses were negative for EBDC and ETU. However, the 12 raw, unwashed spinach samples contained relatively high levels o f EBDC residues (5.2 -80ppm calculated as zineb) and 0.12 -2.3 p p m ETU; the ETU residue levels were somewhat proportional to the EBDC residue levels. It appears that washing the spinach before canning removes the EBDC residues, but not the ETU residues. Cooking the raw spinach samples in the laboratory to yield 'kooked" or "total" ETU was found to be useful for identification and semiquantitative confirmation of EBDC residues. There was considerable variation between replicate ETU determinations for each spinach sample. This paper was presented at the 95th Annual Meeting of the Association of Offi-Author to whom reprint requests should be sent: William 59 1 I2311 8 23 12/15/11 12/23/77 12/31/17 ' Harvest date is approximately the same as collection date Fj 4 0 s tl m c3 C 2 M E z X ?i c3 0

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“…2 Since EBDCs are thermally unstable, gas chromatography (GC) or GC/mass spectroscopy (MS), widely used for monitoring trace chemical substances in the environment, cannot be used for their analysis. Therefore, some other methods have been developed, using its oxidation product, 3,4 its methyl iodide derivative, [5][6][7] and highperformance liquid chromatography (HPLC); 8 however, these methods require special treatments for improving sensitivity.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical Detection of Manzeb Using Reductive Desorption from Au(111) and Au(100)

et al. 2018

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Electrochemical detection of ethylenebis(dithiocarbamic acid) manganese zinc complex (Manzeb), a widely used insecticide, by reductive desorption from Au(111) and Au(100) has been studied. Dithiocarbamate groups containing adlayer were formed on gold single-crystal electrodes by immersing into a Manzeb aqueous solution. The electrochemical responses and the adsorption amounts were evaluated based on the reductive desorption of sulfur species from the gold surface in alkaline solution. The detection limit for Manzeb depended on the modification time and the crystallographic orientation of gold. The limits of detection were 500 nM and 100 nM when a Au(111) electrode and a Au(100) electrode were used, respectively. The surface-enhanced infrared absorption spectra of Manzeb on a Au thin film electrode in its monolayer state showed that Manzeb was adsorbed on the substrate via the dithiocarbamate moiety and the long axis of ethylenebis(dithiocarbamate) dianion was almost perpendicular to the surface.

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Method for determining ethylenebis(dithiocarbamate) residues on food crops as bis(trifluoroacetamido)ethane

Abstract: Ethylenebis(dithiocarbamate) added to food crops was measured as ethylenediamine after hydrolysis with acid containing stannous chloride.The ethylenediamine was isolated by ion exchange chromatography and quantitated by gasliquid chromatography of its bis(trifluoroacetate).

Cited by 21 publications

References 10 publications

Improved sample pretreatment of the carbon disulfide evolution method for the determination of dithiocarbamate residues in lettuce

Improved sample pretreatment of the carbon disulfide evolution method for the determination of dithiocarbamate residues in lettuce

The Results and Evaluation of a Limited Survey for Ethylenebisdithiocarbamate and Ethylenethiourea Residues in Correlated Raw and Canned Spinach and Tomato Samples

Electrochemical Detection of Manzeb Using Reductive Desorption from Au(111) and Au(100)

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