The Determination of Calcium in the Presence of Magnesium and Phosphates: The Determination of Calcium in Urine

McCrudden, Francis H.

doi:10.1016/s0021-9258(18)88799-3

Cited by 127 publications

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“…Urinary calcium. This was determined by the method of McCrudden [1911]. If the urine was alkaline, it was made slightly acid to litmus with HC1 and filtered.…”

Section: Methodsmentioning

confidence: 99%

Variations of serum-calcium in the rabbit

Bourne

Campbell

1932

Biochemical Journal

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IN continuing the investigation of the relation of blood-calcium to the formation of cataract in rabbits, we found that there are certain conditions under which the serum-calcium shows considerable variations. It is true that one of us [Adams, 1930] previously obtained satisfactory control experiments in which only very slight variations were observed; but, with repeated experiments, it became apparent that the level of serum-calcium may vary considerably in individual rabbits, over long periods, and in particular with different diets.The evidence of other observers is conflicting. Thus Davies, Dickens and Dodds [1926] state that in individual rabbits the serum-calcium does not vary more than 1*5 mg. per 100 cc. serum. Ssewerin [1927] states that the serumcalcium level remains unchanged when cabbage is fed to a starving rabbit. He gives no figures. On the other hand, Ipponsugi [1927, 1], in fifteen control rabbits, found the serum-calcium varying from 13-5 to 18 mg. per 100 cc. and in ten other controls he found variations from 12 to 17 mg. per 100 cc. Harnes [1928] determined the serum-calcium in eighty rabbits throughout one year and found variations from 14-5 to 18-5 mg. per 100 cc. Culhane [1927] reports variations, in six rabbits fed on oats and cabbage, from 14-31 to 17-12 mg. Ca per 100 cc. serum. Kapsinow and Underhill [1929] observed considerable daily variations in the serum-calcium level, usually between 10 and 15 mg. per 100 cc. serum, with one figure as high as 21 mg. per 100 cc.In addition there exists a further uncertainty as to the effect of diet' on the serum-calcium in this animal. Culhane [1927Culhane [ , 1930 reported that cabbage causes a rise in the serum-calcium, but Kapsinow and Underhill [1929] were unable to confirm this. Cannon and Greenwood [1930] found that a diet of sweet clover caused the serum-calcium of young rabbits to decrease.1 After this paper had been sent to press, we received the copy of the Journal of Biological Chemistry for December, 1931, containing an article by Dupr6 and Semeonoff [1931] in which the effects of diet on serum-calcium and phosphorus in the rabbit are described. The results obtained by these authors are in agreement with those which we report in this paper.

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“…Urinary calcium. This was determined by the method of McCrudden [1911]. If the urine was alkaline, it was made slightly acid to litmus with HC1 and filtered.…”

Section: Methodsmentioning

confidence: 99%

Variations of serum-calcium in the rabbit

Bourne

Campbell

1932

Biochemical Journal

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“…IS well known that calcium can be precipitated as the oxalate without interference by moderate amounts of iron or aluminum, if the pH is sufficiently low (1,3,7). A search of the literature, however, fails to reveal an adequate study of the effect of variations in the quantity of the accompanying elements on the accuracy of the calcium determination.…”

Section: Itmentioning

confidence: 99%

Accurate Determination of Calcium without Reprecipitation in Presence of Aluminum, Iron, Magnesium, Manganese, Phosphorus, Sodium, and Titanium

McComas¹,

Rieman²

1942

Ind. Eng. Chem. Anal. Ed.

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Metabolism in a Case of Hemochromatosis

Mcclure¹

1918

Arch Intern Med

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Meltzer, in 1900, and Parker,2 in 1903, suggested that the deposition of iron-containing pigment in the tissues in hemochromatosis was in part the result of faulty retention of iron. This view was given support in a more recent article edited by Garrod3 in which Mackenzie Wallis stated that no iron was found in the feces, urine, or bile of a case of hemochromatosis while a slight increase in the iron content of *

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The Determination of Calcium in the Presence of Magnesium and Phosphates: The Determination of Calcium in Urine

Cited by 127 publications

References 0 publications

Variations of serum-calcium in the rabbit

Variations of serum-calcium in the rabbit

Accurate Determination of Calcium without Reprecipitation in Presence of Aluminum, Iron, Magnesium, Manganese, Phosphorus, Sodium, and Titanium

Metabolism in a Case of Hemochromatosis

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