Determination of Lead

Winter, O. B.; Robinson, Helen M.; Lamb, Frances W.; Miller, E.

doi:10.1021/ac50096a023

Cited by 29 publications

(8 citation statements)

References 3 publications

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“…The organic matter on a portion of the dried material was destroyed with mixed sulphuric, perchloric and nitric acids and the metals estimated colorimetrically; copper as the diethyldithiocarbamate by the method of Eden & Green (1940), iron as the thiocyanate complex extracted in amyl alcohol and lead as the dithizonate in chloroform according to Green's* modification of the method of Winter, Robinson, Lamb & Miller (1935).…”

Section: Methodsmentioning

confidence: 99%

The copper, iron and lead contents of a series of livers from normal foetal and new-born lambs

McDougall

1947

J. Agric. Sci.

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The copper, iron and lead contents were determined on an age series of foetal livers obtained during the latter half of pregnancy from normal ewes at Cambridge. The total amounts of the metals showed a rapid rise during the last 3 weeks of gestation due to an increase in the size of the organ and in the actual concentrations. Towards full term and in the new-born animal the results showed an increasing variation which even extended to twins. It is noted that foetal transference takes place without affecting the blood copper of the ewe or causing a physiological anaemia of pregnancy. The time at which the process is at its height is correlated with experience in the prophylaxis of swayback. It is estimated that the store of copper at birth may tide the lamb through the suckling period but the store of iron requires to be supplemented by the diet and that the ewe's milk may make a significant contribution towards this. The small amounts of lead found were of the same order as reported for normal humans and in swayback lambs in Derbyshire; hence the latter cannot be regarded as abnormal.

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Section: Methodsmentioning

confidence: 99%

The copper, iron and lead contents of a series of livers from normal foetal and new-born lambs

McDougall

1947

J. Agric. Sci.

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“…The method, applicable also to inorganic lead samples, is based upon an adaptation of the high pH dithizone method previously developed in this laboratory (7). This dithizone method is essentially a single-color method which differs from the conventional single-color methods (3,6,8) in that repeated extraction with an ammoniacal solution is not necessary to remove the excess dithizone from lead dithizonate. A single extraction contains all the load dithizonate and an in-structed scrubber containing an iodine-potassium iodide solution.…”

Section: Air Sampling Scrubbersmentioning

confidence: 99%