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Abstract The procedure described employs aluminum oxide filter paper disks to shorten the time and increase the efficiency of the catecholamine screening test. There is less opportunity for loss of catecholamines during adsorption, transfer, or elution. Received for publication October 3, 1963....
Abstract A direct ultraviolet absorption method that does not require uricase for the determination of serum urate is presented. Serum (0.3 ml.) is placed in the bottom of a 25 X 95-mm. shell vial and coagulated by immersion of the vial in boiling water for 2 min. The clot is overlaid with 3.0...
Abstract The limitations, inaccuracies, and practical difficulties of saccharogenic methods are discussed. A modified colorimetric microdetermination of amylase is described in which the digestion of starch is measured by the decrease in the starch-iodine color. Experimental data show that there...
Abstract A multiple automatic analyzer has been constructed which determines albumin, total protein, chloride, carbon dioxide, sodium, potassium, glucose, and urea nitrogen. The results for each of these 8 determinations are obtained in sequence for an individual sample and are recorded on a...
Abstract A new instrument is described for evaluating electrophoretograms on various media. The same densitometer can be used to evaluate spots on chromatographic strips and for colorimetric analysis of solutions. The versatility of this instrument makes it a useful adjunct to any analytical...
Abstract Atomic absorption spectrophotometry (AAS) was applied to the determination of serum calcium. A special diluent was developed to abolish the effect of absorption depressors. This made possible measurement of calcium in directly diluted serum samples without prior removal of any serum...
Abstract Spectrophotometric or colorimetric data are normally obtained in some type of photometric unit and must be dealt with mathematically to provide a final result expressed in concentration. Such mathematical operations are time-consuming, require data transfer, and are subject to human...
Abstract A method for the determination of serum glucose employing a heat clot technic for the elimination of protein and other interfering substances is described. Serum (0.10 ml.) and absolute methyl alcohol (0.09 ml. delivered as six drops) are mixed in a shell vial and a clot is formed by...
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