Sugars in urine

Benedict s quantitative reagent (sugar in urine) This solution contains 18 g copper sulfate, 100 g of anhydrous sodium carbonate, 200 g of potassium citrate, 125 g of potassium thiocyanate, and 0.25 g of potassium ferrocyanide per liter 1 mL of this solution = 0.002 g sugar. 

Harn-untersuchung, /. investigation of urine, urinalysis. -wa(a)ge, /. urinometer. weg, m. urinary passage, -zucker, m. sugar in urine. 

Nylander reagent chem A solution of Rochelle salt (potassium sodium tartrate), potassium or sodium hydroxide, and bismuth subnitrate in water used to test for sugar in urine. m-lon-dor re,a-(3nt ... 

Since Fehling s test gives a positive result for any aldose or 2-ketose, it is evidence that there could be a sugar in urine but would not be a definitive test for glucose per se. 

A system for the screening and identification of reducing sugars in urine using one-dimensional t.l.c. on silica gel has been developed.Colour was developed by the aniline-diphenylamine method. 

W. H. Wu, C. Greene, Interaction of boric acid with diol compounds and its application for the measurement of sugar in urine, Clinical Chemistry 1986, 32, 1193. 

W mended that the sugars in urine be identi-- fied by chromatography of their phenylosa-... 

For example, the abUity of charcoal (carbon) to bum in air is a chemical property. When charcoal bums, it combines with oxygen in air to become carbon dioxide gas. After the chemical change, the amounts of the original substances, carbon and oxygen, are not less than before. They simply have recombined to form different substances with different properties. Figure 2.4 shows how a chemical property of a substance known as Benedict s solution is used to test for sugars in urine. 

Chemical Properties Because Benedict s solution possesses certain chemical properties, a test strip containing it is used to test for the presence of sugar in urine. The test strip is dipped into the sample. The test strip is then matched to a color scale to determine the sugar level in the urine. 

Of the numerous copper reduction methods for the estimation of sugar in urine that of Shaffer and Hartmann (81) is particularly satisfactory when adapted for the estimation of glucuronic acid (22,23). The method cannot be satisfactorily used if sugar is present and must be used with caution for ether glucuronides (see end of section). 

The reagent is designed specifically for the detection of sugar in urine. It consists of 17 3 gm. crystalline CuSOj.5HjO, with 173 gm. Na citrate, and 100 gm. anhydrous NajCOs in 1 Utre water. 

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