Trennung von Organophosphor-Pestiziden und ihren Metaboliten auf Glaskapillarsäulen

Hild, J.; Schulte, E.; Thier, Hans‐Peter

doi:10.1007/bf02312652

Cited by 9 publications

(3 citation statements)

References 5 publications

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“…Data points in Figure 5 are connected simply to show the qualitative trend in the data; smooth curves were too difficult to draw without indicating trends which did not necessarily exist due to the use of an insufficient number of data points. The residue levels found are not unusual and compare favorably with soil residues found for phenthoate (Iwata et al, 1981) and methidathion (Iwata et al, 1979). The results with respect to the various relative proportions of oxidation products parallel the data found for rind residues (Figures 2 and 3) obtained for unwashed fruits.…”

Section: Resultssupporting

confidence: 77%

“…Quantification was based on a single unresolved peak resulting from all three isomers. Hild et al (1978) reported on the glass-capillary gas chromatographic properties of the three geometric chlorthiophos isomers (2,5-dichloro-4-methylthio, 4,5-dichloro-2-methylthio, and 2,4-dichloro-5-methylthio) and their corresponding sulfones.…”

Section: Resultsmentioning

confidence: 99%

“…Soil Dust. The procedure of Iwata et al (1979) was used. Briefly, the procedure entailed shaking a 10-g dust sample with 10 mL of 10% aqueous acetone and 10 mL of hexane for 20 min.…”

Section: Methodsmentioning

confidence: 99%

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Fruit residue data and worker reentry research for chlorthiophos applied to California citrus trees

Iwata¹,

Knaak²,

Carman³

et al. 1982

J. Agric. Food Chem.

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Chlorthiophos [0-[2,5-dichloro-4-(methylthio)phenyl] , -diethyl phosphorothioate] was applied to California citrus trees. Residue methodology for the analysis of chlorthiophos, its sulfoxide, its sulfone, its oxon, its oxon sulfoxide, and its oxon sulfone on and in citrus fruit, on foliage, and in soil dust is presented. Residue dissipation curves obtained for these three substrates are given. Dermal dosecholinesterase response curves for the six compounds are given for rats. These data are used to calculate safe residue levels on foliage. On the basis of the dislodgeable foliar residue data, a 70-day reentry interval is proposed.Chlorthiophos [Celathion; O-[2,5-dichloro-4-(methylthio)phenyl] , -diethyl phosphorothioate], on the basis of preliminary results, appeared to be a potentially useful insecticide for the control of the California red scale, Aonidiella aurantii (Mask.), which is one of the major citrus pests in California. Consequently, a study was initiated to obtain residue data for chlorthiophos and any of its five cholinesterase (ChE)-inhibiting oxidation products which may be present after application of chlorthiophos to citrus trees. Figure 1 shows the chemical structures of these compounds. Fruit, dislodgeable foliar, and soil dust residues were obtained to assist in the setting of a fruit tolerance for consumer protection and of a safe reentry interval for protection of agricultural workers who may.engage in prolonged and extensive contact with the treated foliage, the oral LD50 values for mouse, rat, and rabbit are 140, 13, and 20 mg/kg, respectively, and the dermal LDgg values for rat and rabbit are 58 and 48 mg/kg, respectively (Muacevic, 1976). Due to the high acute

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Section: Resultssupporting

confidence: 77%

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Fruit residue data and worker reentry research for chlorthiophos applied to California citrus trees

Iwata¹,

Knaak²,

Carman³

et al. 1982

J. Agric. Food Chem.

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Separation of pesticides by capillary gas chromatography. Part 2: Organophosphorus insecticides

Wolf

Deleu

Copin

1981

J. High Resol. Chromatogr.

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A polar glass capillary column for residue work

Rinderknecht

Wenger

1983

J. High Resol. Chromatogr.

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SummaryPolydiethylene glycol adipate (DEGA) has been successfully used as stationary phase for residue analysis by glass capillary gas chromatography. A specially stabilized version of the phase yields a good polar column which is stable up to 25OOC when used in temperature programmed cycles. The paper lists 90 pesticides that have been successfully chromatographed in ng quantities on a DEGA column.

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Trennung von Organophosphor-Pestiziden und ihren Metaboliten auf Glaskapillarsäulen

Cited by 9 publications

References 5 publications

Fruit residue data and worker reentry research for chlorthiophos applied to California citrus trees

Fruit residue data and worker reentry research for chlorthiophos applied to California citrus trees

Separation of pesticides by capillary gas chromatography. Part 2: Organophosphorus insecticides

A polar glass capillary column for residue work

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