Microdetermination of dihydroxyacetone in biological fluids

Microdetermination of Chloride in Biological Fluids, with Solid Silver Iodate

was outlined in detail, with gasometric measurement of the iodate resulting from the reaction. In this paper titrimetric measurement of the iodate is described. Titrimetric measurement of the iodate is directly applicable to the supernatant fluid in the AgI08 precipitation of chloride from salt solutions, urine, serum, and protein-free jiltrate of serum and of whole blood.’ For the titrimetric ...

Photoelectric Microdetermination of Chloride in Biological Fluids, and of Iodate and Iodine in Protein-free Solutions

The Microdetermination of Biological Copper with Oxalyldihydrazide.

Methods are described for the determination of microgram quantities of biological copper in aqueous medium as the intensely coloured oxalyldihydrazide-acetaldehyde complex (molar extinction coefficient 23,000 to 23,500). The methods are applicable on a routine basis to any biological material, in particular to serum, urine, or tissues, such as liver, brain, or kidney. In the case of urine a sim...

Microdetermination of calcium and magnesium in biological materials.

The use of the dye calcon (1-(2 hydroxy-1-naphthylazo)-2-naphthol-4 sulphonic acid) for the estimation of calcium using E.D.T.A. and a commercial photoelectric titrimeter is described. The interfering effects of magnesium and phosphate have been overcome. The method has been extended to estimations on biological materials. Results on 55 sera show that the E.D.T.A./calcon method gave slightly lo...

Determination of Chlorides in Biological Fluids by the Use of Adsorption Indicators the Use of Dichlorofluorescein for the Volumetric Microdetermination of Chlorides in Zinc Filtrates of Biological Fluids by Abraham Saifer and James Hughes

This paper presents evidence that zinc filtrates (particularly the Hagedorn-Jensen (1923) filtrates) of urine (after treatment with hydrogen peroxide), whole blood, plasma, or serum are suitable for the accurate determination of chlorides with dichlorofluorescein as an indicator. The precision of this method for urine chlorides has been shown by comparison with established procedures such as th...