macro-Kjeldahl method

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mac·ro-Kjel·dahl meth·od

(kyel'dahl),
a procedure for analyzing the content of nitrogenous compounds in urine, serum, or other specimens, usually to determine relatively large amounts of nitrogen (for example, 20-100 mg); the specimen is treated with a digestion mixture (copper sulfate and sulfuric acid), heated thoroughly, and made alkaline with a solution of sodium hydroxide; ammonia is then distilled from the mixture, trapped in a boric acid-indicator solution, and titrated with standard hydrochloric or sulfuric acid.
[Johan G. C. Kjeldahl]

Kjeldahl,

Johan G.C., Danish chemist, 1849-1900.
Kjeldahl apparatus - an apparatus used in nitrogen analysis.
Kjeldahl method
macro-Kjeldahl method - a procedure for analyzing the content of nitrogenous compounds in urine, serum, or other specimens.
micro-Kjeldahl method - a modification of the macro-Kjeldahl method designed for the analysis of nitrogenous compounds in relatively small quantities.
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The Kjeldahl method as a primary reference procedure for total protein in certified reference materials used in clinical chemistry.
GROWTH AND NUTRIENT UTILIZATION OF GREENLIP ABALONE (HALIOTIS LAEVIGATA) FED ULVA SP. PROTEIN EXTRACT
The residual protein was then determined using semi-micro Kjeldahl method according to the AOAC procedure 978.
BIOFORTIFICATION OF MAIZE FLOUR WITH GRAIN AMARANTH FOR IMPROVED NUTRITION
5 soil/water suspension, lime by calcimetric methods, organic matter by the modified Walkley Black method, salt content by Richards, total nitrogen by Kjeldahl method, available phosphorous by the method of Olsen, potassium, calcium and magnesium by extracted with 1 N neutral ammonium acetate, total elements and heavy metals by atomic absorption spectrophotometry (AAS).
THE EFFECTS OF SEWAGE SLUDGE TREATMENT ON TRITICALE STRAW YIELD AND ITS CHEMICAL CONTENTS IN RAINFED CONDITION
Total protein was determined by the Kjeldahl method (N x 6.
Protein hydrolysate waste of whitemouth croaker (Micropogonias furnieri) as a way of adding value to fish and reducing the environmental liabilities of the fishing industry
Total N and P of wheat straw were determined by the Kjeldahl method and the vanadium molybdate yellow colourimetric method, respectively, after digestion with [H.
Soil microbial biomass carbon and phosphorus as affected by frequent drying-rewetting
The current method for protein analysis is the Kjeldahl method, which dates back to the early 1880s.
Six more dietary ingredients picked for analytical evaluation: an advisory panel has selected aloe vera, vitamin B12, protein, ginger, vitamins K1 and K2 and free amino acids as priority ingredients for review
Among the methods applied to quantify the total nitrogen content of feeds, the Kjeldahl method is the most widely used.
Evaluation of digestion procedures in Kjeldahl method to quantify total nitrogen in analyses applied to animal nutrition/Avaliacao da etapa de digestao do metodo de Kjeldahl para quantificacao do nitrogenio total em analises voltadas a nutricao animal
Kjeldahl method was used for protein contents estimation (AOAC, 2005).
NUTRITIONAL EVALUATION OF DIFFERENT CHEDDAR CHEESE VARIETIES MADE FROM BUFFALO AND COW MILK
After harvest, a sample grain was ground and the N content in the grain was analyzed using sulfuric acid digestion and determination by the Kjeldahl method.
Wheat technological quality as affected by nitrogen fertilization under a no-till system/Qualidade tecnologica do trigo influenciada pela adubacao nitrogenada em sistema de plantio direto
The content of N P K were determined by Kjeldahl method Mo-Sb Colorimetry and Flame photometry respectively [19].
Preparation and Nutrient Release Mechanism of a Polymer as Slow-Release Compound Fertilizer
The revised Standard reconfirms the crucial role of the Kjeldahl method in trade harmonization and enhances consumer protection safeguards.
Protein measurement standard expanded
High-throughput analysis of total nitrogen content that replaces the classic Kjeldahl method.
Drying temperature on the concentration of nutrients in Eucalyptus dunnii Maiden/Temperatura de secagem sobre a concentracao de nutrientes em Eucalyptus dunnii Maiden

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