Assessment of a Colorimetric Method for Magnesium Determination

A Colorimetric Method for the Determination of Small Amounts of Magnesium.*

The gravimetric method for the determination of magnesium is not adequate for the estimation of the small amounts of this element present in biological material such as the ash of the bones of small animals like the rat. The microcolorimetric method devised by Kramer and Tisdall’ is objectionable because of the nature and technique of the calorimetric comparisons. Inasmuch as the procedure deve...

A colorimetric method for the estimation of serum magnesium.

I955 The author wishes to express his sincere appreciation to Dr R. E. Hungate for an introduction to the fascinating cattle protozoa and for many stimulating discussions during the course of the experiments. The investigation was supported in part by funds for biological and medical research by the State of Washington, initiative measure number 171. In clinical work, where general electrolyte ...

Colorimetric method for rapid determination of bacteriuria.

An inexpensive, rapid, and simple colorimetric test for detection of bacteriuria is described. This test does not require bacterial growth and has the marked advantage of being able to quantify bacteria, even when the organisms are present in the urine of bacteriuric patients who are being treated with antibiotics. The test is carried out with 1 ml of urine, which is processed through a 10-mm-d...

Evaluation of a colorimetric method for determination of glycosylated hemoglobin.

We evaluated a colorimetric assay for glycosylated hemoglobin to determine the effects of several variables --oxalic acid concentration, extraneous glucose, hemoglobin concentration, hydrolysis interval, and 5-hydroxymethylfurfural destruction--and the precision. The interference seen when the blood glucose concentration exceeds 2.0 g/L (11 mmol/L) can be eliminated by washing the erythrocytes ...

A new simple semimicro method for colorimetric determination of urea.