Colorimetric Determination of DDT in Milk and Fatty Materials

Schechter, M. S.; Pogorelskin, M. A.; Haller, H. L.

doi:10.1021/ac60001a014

Cited by 33 publications

(11 citation statements)

References 28 publications

(12 reference statements)

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“…for DDT and 1 p.p.m. for Kelthane in feeds (7, 8). This straight line obtained by the authors also fits the data obtained by Claborn et al (7) for higher levels of toxaphene (Figure 2).…”

supporting

confidence: 87%

Insecticide Residues in Milk and Meat, Residues in Butterfat and Body Fat of Dairy Cows Fed at Two Levels of Kelthane (1.0 and 2.0 P.P.M.)

Zweig¹,

Pye²,

Peoples³

1963

J. Agric. Food Chem.

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“…for DDT and 1 p.p.m. for Kelthane in feeds (7, 8). This straight line obtained by the authors also fits the data obtained by Claborn et al (7) for higher levels of toxaphene (Figure 2).…”

supporting

confidence: 87%

Insecticide Residues in Milk and Meat, Residues in Butterfat and Body Fat of Dairy Cows Fed at Two Levels of Kelthane (1.0 and 2.0 P.P.M.)

Zweig¹,

Pye²,

Peoples³

1963

J. Agric. Food Chem.

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“…Various papers have been published (Clifford, 1947 ;Schechter, Pogorelskin & Haller, 1947 ;Fairing & Warrington, 1950;Jones & Riddick, 1951, 1952Krzeminski & Landmann, 1963) describing the isolation of minute amounts of pesticides from biological specimens by means that are usually complex and tedious. Extensive cleanup is required, and is accomplished for example by hexane : aceto-nitrile partitioning (Jones & Riddick, 1952;McKinley & Savary, 1962), paper chromatography (Mitchell, 1957;Muller, Ernst & Schock, 1957;MacRae & McKinley, 1961), thin layer chromatography (Walker and Beroza, 1963), silicic acid (Moats, 1962) and florisil column chromatography (Moddes, 1961 ;Moats, 1963).…”

mentioning

confidence: 99%

Simplified gas chromatographic analysis of pesticides from blood

Jain

Fontan

Kirk

1965

Journal of Pharmacy and Pharmacology

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A rapid method for the extraction and identification of 23 pesticides present in blood is described. The pesticides are extracted from blood with a mixture of acetone and ethyl ether in equal volumes. The extracts are evaporated to dryness, the residue dissolved in a known quantity of hexane and an aliquot injected directly into the gas chromatograph equipped with an electron capture detector. No purification of the acetone-ether extract is required. A glass column packed with 5% SE 52 on hexamethyldisilizane-treated chromosorb W 60180 is used at a temperature of 190". The method was successfully applied to blood from laboratory animals to which acute doses of six of the most common pesticides were given orally. The quantity of pesticides found is reported.YSTEMATIC schemes for the isolation and identification of toxic S substances are largely confined to conventional poisons. With the advent of many new compounds having toxic properties, the deficiencies of the classical procedures have been made more obvious. This is especially true of the group of pesticides which includes chlorinated hydrocarbons and organophosphorus compounds. Symptoms associated with these have been treated as chronic rather than acute effects, and analysis has largely been directed towards the control of pesticide residues on foodstuffs.Acute poisoning from these materials is increasing and the toxicologist needs to be able to identify rapidly and with certainty the presence in physiological materials of acutely toxic quantities of such materials. The quantities of pesticides in such cases are so small, and the conventional tests so insensitive and non-specific, that these poisons may readily be overlooked. It is therefore essential to make available simple and rapid methods of extraction to be used with detection methods to ensure that toxic material is not overlooked. Also the procedure should not require extensive clean up of the extracts before it can be applied.Various papers have been published (

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“…Preliminary removal of edible oil by the technique of Schechter, Pogorelskin & Haller (1947) was of some use but an entirely satisfactory method for carrying out such analyses appears to be lacking, and as might be expected figures obtained in the three Laboratories were not in particularly good agreement. The analytical results obtained on the oil and cake samples are given in Table I11 ; the proportion of each insecticide absorbed and contamination caused to each whole pyramid are calculated.…”

Section: Methodsmentioning

confidence: 94%

Contamination caused to sacked decorticated groundnuts by direct spraying with aqueous suspensions of BHC and DDT

Hayward¹

1951

J Sci Food Agric

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DiscussionThe primary object of this investigation was to check that fluorescent lighting is a suitable means of illuminating a chick laboratory where assays for vitamin D, are in progress. I t was satisfactorily established that such lighting, when screened with 26-02. clear glass, did not interfere with the development of rickets in chicks, but the experiments indicated that fluorescent lighting can have a depressing effect on chick growth. When given a rachitogenic diet, birds exposed to IOU ft.-candles of light from a fluorescent tube grew significantly less well than the controls in tungsten light, but such growth depression was not observed at intensities of about 30 ft.-candles. Growth of normal chicks was also depressed in high-intensity fluorescent light, although this depression was not statistically significant.It is possible that this effect was exerted not on the chicks themselves, but on some lightlabile component(s) of the diet. During the first experiment solutions of riboflavin were placed on the brooders at the same level as the diets. As would be expected, the solutions were very considerably reduced in potency after a few days, but the destruction of riboflavin was no greater in the fluorescent than in the tungsten light. Furthermore, the diets were replenished every few days to minimize their exposure to radiation and, although it is conceivable that light-labile factors other than riboflavin might have undergone greater destruction in the fluorescent light, none of the birds showed the slightest sign of any known vitamin deficiexy apart from the intentional production of rickets.

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Colorimetric Determination of DDT in Milk and Fatty Materials

Cited by 33 publications

References 28 publications

Insecticide Residues in Milk and Meat, Residues in Butterfat and Body Fat of Dairy Cows Fed at Two Levels of Kelthane (1.0 and 2.0 P.P.M.)

Insecticide Residues in Milk and Meat, Residues in Butterfat and Body Fat of Dairy Cows Fed at Two Levels of Kelthane (1.0 and 2.0 P.P.M.)

Simplified gas chromatographic analysis of pesticides from blood

Contamination caused to sacked decorticated groundnuts by direct spraying with aqueous suspensions of BHC and DDT

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