The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Picrates

salts of picric acid, or 2,4,6-trinitrophenol. Metal picrates are crystals ranging from yellow to red in color; Li and Na salts are moderately soluble in water, whereas salts of K and heavy metals, such as Pb, Cu, and Ca, are poorly soluble. Pi-crates are obtained by the action of metal hydroxides or carbonates on picric acid solutions, as well as by exchange reactions between barium or lithium picrates and the sulfates or nitrates of some metals, most often Pb.

Picrates are highly sensitive to mechanical effects and are readily inflammable and quick-burning explosives (the combustion rates for magnesium, potassium, and lead picrates at a pressure of 5 meganewtons per sq m, or 50 kilograms-force per sq cm, are 1.2, 3.5, and 21 cm sec, respectively). They have high thermal stability (particularly potassium and magnesium salts).

Organic bases are often isolated from mixtures and identified in picrate form. The term “picrates” is also used to designate complexes formed for aromatic hydrocarbons and picric acid.

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References in periodicals archive

Serum creatinine was measured on a Dimension Vista system clinical chemistry analyzer (Siemens) with an assay using a modification of the kinetic Jaffe reaction (alkaline picrate reaction).

Comparative Performance of Creatinine-Based Estimated Glomerular Filtration Rate Equations in the Malays: A Pilot Study in Tertiary Hospital in Malaysia

Blood Creatinine ([micro]mol/1): Creatinine reacted with picric acid in presence of an alkah to form orange-red colour of creatinine picrate. Proteins in the blood were precipitated with tungstic acid.

Critical swim speed and metabolic activities in trained male and female swimmers after 400 m free style swimming with their full effort

Determination of cyanide in Amanitia muscaria samples using alkaline picrate method.

Concentraciones de alcaloides, glucosidos cianogenicos, polifenoles y saponinas en plantas medicinales seleccionadas en Ecuador y su relacion con la toxicidad aguda contra Artemia salina

In this method creatinine present in the sample reacts with alkaline picrate forming a reddish complex and the intensity of the color thus produced is measured at the wavelength of 510nm which is proportional to the creatinine concentration present in the sample.

ESTIMATION OF GLOMERULAR FILTRATION RATE IN HEALTHY ADULT PAKISTANI POPULATION: A COMPARISON OF COCKCROFT GAULT AND MODIFIED DIET IN RENAL DISEASE

Biochemical Assay: Blood urea and creatinine level were estimated by Direct Colorimetric method using Diacetyl Monoxime Reagent and Alkaline Picrate Method as described by McLauchlan DM.

N-acetylcysteine effect on gentamicin induced nephrotoxicity in animal models

Total cyanide determination of plants and foods using the picrate and acid hydrolysis methods.

Cyanide two-step: Fruits lead and seeds follow in the chemical phenology of a subtropical cherry

Serum creatinine was measured with the architect C 16000 (Abbott) device by using the kinetic alkaline picrate method at the biochemistry laboratory of the hospital.

Neutrophil to lymphocyte ratio might help prediction of acute myocardial infarction in patients with elevated serum creatinine

At the end of the experiment, blood plasma was thawed at room temperature and analyzed to determine urea, following modified diacetyl method, with picrate and acidifier.

Protected fat and variable level of protein in diets of crossbreed cows in early lactation/Gordura protegida e nivel variavel de proteina em dietas para vacas mesticas no terco inicial da lactacao

In this method, creatinine reacts with picrate to form a coloured complex and the rate of formation of the complex is measured photometrically at 492 nm.

Snails and fish as pollution biomarkers in Lake Manzala and laboratory a: Lake Manzala snails