Rapid Determination of Nitrate Nitrogen in Presence of Ammonia and Urea

Engelbrecht, R. M.; McCoy, F. A.

doi:10.1021/ac60118a033

Cited by 12 publications

(4 citation statements)

References 2 publications

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“…Nitrogen was determined by the Kjeldahl method, inorganic sulfate gravimetrically as barium sulfate, and organic acids by the method of Van Slyke and Palmer (6). The remaining measurements were made with the Technicon autoanalyzer, with, where necessary, appropriate modifications of the following methods: sodium and potassium by flame photometry; creatinine by the method of Chasson, Grady, and Stanley (7); phosphate by the method of Fiske and Subbarow (8); ammonium by the method of Logsdon (9); and nitrate by the method of Engelbrecht and McCoy (10). Daily balance was calculated as net intake minus combined output in urine, stool, blood, and gastric juice.…”

Section: Methodsmentioning

confidence: 99%

The renal response to acid loads in metabolic alkalosis; an assessment of the mechanisms regulating acid excretion.

Tannen¹,

Bleich²,

Schwartz³

1966

J. Clin. Invest.

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Section: Methodsmentioning

confidence: 99%

The renal response to acid loads in metabolic alkalosis; an assessment of the mechanisms regulating acid excretion.

Tannen¹,

Bleich²,

Schwartz³

1966

J. Clin. Invest.

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“…Nitrate was determined in plasma for 5 animals and urine for 7 according to the method of Engelbrecht and McCoy (5) anions one-fifth ( Figure 6). Plasma nitrate concentration averaged 4 3.…”

Section: Methodsmentioning

confidence: 99%

On the Mechanism of Nitrate-Induced Alkalosis. The Possible Role of Selective Chloride Depletion in Acid-Base Regulation*

Gulyassy¹,

Strihou²,

Schwartz³

1962

J. Clin. Invest.

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It has recently been demonstrated that the rate of both hydrogen and potassium excretion can be acutely increased when a disproportion is created between the quantity of sodium and the quantity of penetrating anion available for reabsorption (1). This experimental condition was achieved by the infusion of neutral sodium phosphate into animals which had previously been maintained on a diet poor in sodium chloride. Such short-term observations raised the possibility that sustained changes in availability of penetrating anion might of themselves induce chronic alterations in body fluid composition. This hypothesis was supported by the subsequent observation that restriction of dietary chloride prevents correction of plasma bicarbonate elevations induced by chronic hypercapnia or administration of desoxycorticosterone acetate (DOCA) (2, 3). In each of the latter circumstances, however, the elevated plasma bicarbonate presumably developed as a result of direct acceleration of sodium-cation exchange and these observations, therefore, throw no light on the possible consequences of a primary loss of chloride in a normal animal. Such a loss might be expected to produce either secondary sodium (and volume) depletion, diversion of sodium reabsorption to the cation-exchange mechanism, or some combination of the two. In order to investigate this problem, chloride deficiency has been produced in dogs by the repeated infusion of nitrate, an anion known to induce chloruresis (4).

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“…A modification of a previously known method, which involves reduction of the nitrate with an excess of ferrous sulfate and titration with permanganate, permits rapid determination of nitrate nitrogen in the presence of ammonium, potassium, sodium, chloride, phosphate, sulfate, and urea (27). In another method for nitrate-applicable in the presence of carbonate, chloride, phosphate, sulfate, and many cations, including ammonium-the nitrate is decomposed with an excess of sulfamic acid, and the excess is titrated with sodium nitrite solution using starchiodide as an external indicator (37).…”

Section: Nitrogenmentioning

confidence: 99%

Recent Developments and Current Problems in Inorganic Analytical Chemistry. Fertilizers

Jacob¹

1959

Anal. Chem.

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Rapid Determination of Nitrate Nitrogen in Presence of Ammonia and Urea

Cited by 12 publications

References 2 publications

The renal response to acid loads in metabolic alkalosis; an assessment of the mechanisms regulating acid excretion.

The renal response to acid loads in metabolic alkalosis; an assessment of the mechanisms regulating acid excretion.

On the Mechanism of Nitrate-Induced Alkalosis. The Possible Role of Selective Chloride Depletion in Acid-Base Regulation*

Recent Developments and Current Problems in Inorganic Analytical Chemistry. Fertilizers

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