Ultramicro determination of chloride.

Ultramicro- and micro-determination of chloride by argentimetric titration with the indicator dichlorofluorescein.

A reliable ultramicro modification of the Franco and Klein (1) determination for chloride, using 20 pi. of plasma, is described. A second procedure, requiring 0.2 ml. of plasma and substituting a titrating syringe for a buret, is suggested as a fast and adequate substitute in the absence of either extensive laboratory facilities or trained personnel. Data on reproducibility and recovery, and a ...

An ultramicro colorimetric method for determination of total and direct serum bilirubin.

A simple reproducible method for the ultramicro determination of total and direct serum bilirubin is presented. This method provides a greater sensitivity than that obtained with other colorimetric ultramicro procedures. Total bilirubin values agree with those obtained with the macro Malloy-Evelyn procedure, but direct-reading bilirubin values were significantly higher with the presented method.

Ultramicro Methods in Biochemistry. Vii. the Determination of Plasma or Serum Urea Nitrogen. 8. the Determination of Serum Uric Acid. Ix. the Determination of Serum Creatinine. Lf-22.

Ultramicro methods for the determination of serum urea nitrogen, uric acid, and creatinine have been evaluated and the results are re corded in reports VII, VIII, and IX, respectively. The method for the determination of urea nitrogen is an ultramicro adaptation of the reaction in which a blue color is developed when the ammonium ion reacts with phenol and hypochlorite. Ammonia is released from...

Critical evaluation of a new ultramicro system for routine clinical chemistry procedures.

THERECENT DEVELOPMENT of an ultramicro analytical system by the Spinco Division of Beckman Instruments, Inc., makes available a range of common clinical chemistry procedures in a form that is space saving as well as economical in time and materials. It was the purpose of this study to investigate and appraise the accuracy and reproducibility of these ultramicro technics and to compare them with...

Colorimetric Ultramicro Method for the Determination of Free Fatty Acids.