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פותח על ידי קלירמאש פתרונות בע"מ -
Residues of HCH isomers and DDT derivatives in Israeli milk and their seasonal fluctuations
Year:
1977
Source of publication :
Phytoparasitica
Authors :
אהרונסון, נדב
;
.
אלומות (אולומוקי), אוגניה
;
.
וירוב, דן
;
.
Volume :
5
Co-Authors:
Veierov, D., Pesticide Chemistry and Residue Research Laboratory, The Volcani Center, Bet Dagan, Israel
Aharonson, N., Pesticide Chemistry and Residue Research Laboratory, The Volcani Center, Bet Dagan, Israel
Alumot, E., Div. of Animal Nutrition, ARO, The Volcani Center, Bet Dagan, Israel
Facilitators :
From page:
26
To page:
33
(
Total pages:
8
)
Abstract:
Residue analysis of milk fat from 12 commercial dairies showed that p,p′-DDE, α-HCH and γ-HCH were the major and most frequent contaminants, at 0.15-0.3 ppm. Beta isomer of HCH was found in the milk in much smaller concentrations (less than 0.05 ppm). Further studies showed that the residue levels of α- and γ-HCH in the milk changed considerably during the 18 months of the experiment. The concentrations fluctuated from a maximum of 1.4-1.6 ppm to as low as 5-10% of these values. The variations in concentration for α- and γ-HCH were very similar, and were found to result from commercial spraying of cows with a formulation of HCH. Three days after spraying two groups of cows with HCH, the residue level rose from 0.02-0.05 ppm to 0.18 ppm. During the next 2-3 months, the concentration of these isomers in the milk fat decreased to 0.02-0.04 ppm. A second spray resulted in an even faster accumulation of α and γ isomers in the milk fat, up to 0.38 ppm, three days after treatment. Comparison between the results obtained from the two groups of cows and those obtained from the analysis of 12 cows showed very small individual variations, with a standard deviation of 15-30% of the mean. The results for DDE were different: its concentration in the milk did not fluctuate so much, and it was similar for all the dairies examined. In goat milk, the concentration of HCH isomers was much lower, not exceeding 0.02-0.05 ppm. The level of DDE was also much lower, 0.02-0.07 ppm. © 1977 Springer Science + Business Media B.V.
Note:
Related Files :
cattle
Goat
milk
milk fat
עוד תגיות
תוכן קשור
More details
DOI :
10.1007/BF03179431
Article number:
Affiliations:
Database:
סקופוס
Publication Type:
מאמר
;
.
Language:
אנגלית
Editors' remarks:
ID:
25994
Last updated date:
02/03/2022 17:27
Creation date:
17/04/2018 00:19
You may also be interested in
Scientific Publication
Residues of HCH isomers and DDT derivatives in Israeli milk and their seasonal fluctuations
5
Veierov, D., Pesticide Chemistry and Residue Research Laboratory, The Volcani Center, Bet Dagan, Israel
Aharonson, N., Pesticide Chemistry and Residue Research Laboratory, The Volcani Center, Bet Dagan, Israel
Alumot, E., Div. of Animal Nutrition, ARO, The Volcani Center, Bet Dagan, Israel
Residues of HCH isomers and DDT derivatives in Israeli milk and their seasonal fluctuations
Residue analysis of milk fat from 12 commercial dairies showed that p,p′-DDE, α-HCH and γ-HCH were the major and most frequent contaminants, at 0.15-0.3 ppm. Beta isomer of HCH was found in the milk in much smaller concentrations (less than 0.05 ppm). Further studies showed that the residue levels of α- and γ-HCH in the milk changed considerably during the 18 months of the experiment. The concentrations fluctuated from a maximum of 1.4-1.6 ppm to as low as 5-10% of these values. The variations in concentration for α- and γ-HCH were very similar, and were found to result from commercial spraying of cows with a formulation of HCH. Three days after spraying two groups of cows with HCH, the residue level rose from 0.02-0.05 ppm to 0.18 ppm. During the next 2-3 months, the concentration of these isomers in the milk fat decreased to 0.02-0.04 ppm. A second spray resulted in an even faster accumulation of α and γ isomers in the milk fat, up to 0.38 ppm, three days after treatment. Comparison between the results obtained from the two groups of cows and those obtained from the analysis of 12 cows showed very small individual variations, with a standard deviation of 15-30% of the mean. The results for DDE were different: its concentration in the milk did not fluctuate so much, and it was similar for all the dairies examined. In goat milk, the concentration of HCH isomers was much lower, not exceeding 0.02-0.05 ppm. The level of DDE was also much lower, 0.02-0.07 ppm. © 1977 Springer Science + Business Media B.V.
Scientific Publication
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