scholarly journals Diphenylcarbazone as an Internal Indicator in Volumetric Analysis. VII. Determination of Mercury

1962 ◽  
Vol 35 (6) ◽  
pp. 900-901 ◽  
Author(s):  
G. S. Deshmukh ◽  
A. L. J. Rao
Keyword(s):  
Volumetric Analysis ◽  
Internal Indicator

Determination of quinol in volumetric analysis

1964 ◽  
Vol 204 (5) ◽  
pp. 337-344 ◽  
Author(s):  
U. A. Th. Brinkman ◽  
H. A. M. Snelders
Keyword(s):  
Volumetric Analysis

A ROUTINE PROCEDURE FOR THE DETERMINATION OF CATECHOLAMINES IN URINE AND TISSUES

1957 ◽  
Vol 35 (9) ◽  
pp. 711-719 ◽  
Author(s):  
Theodore L. Sourkes ◽  
Boris D. Drujan
Keyword(s):  
Extraction Process ◽  
Small Error ◽  
Routine Laboratory ◽  
Routine Procedure ◽  
Second Stage ◽  
Internal Indicator ◽  
Average Factor ◽  
Simplified Procedure ◽  
Catecholamines In Urine

A simplified procedure for the determination of catecholamines, suitable for routine laboratory use, has been developed. The whole of the adsorption–elution process, by which the catecholamines are concentrated and purified, is performed in one flask. The potentiometric titration required at this stage in the adsorption of the catecholamines on alumina is avoided by the use of phenol-phthalein as an internal indicator. The fluorimetric estimation in the second stage of the procedure is based upon lutin formation, a reaction nearly specific for adrenaline and noradrenaline. The small error resulting from the presence of hydroxytyramine in the urine is discussed. The method provides for the determination of losses encountered in the extraction process, so that each run includes an internal correction rather than an assumed average factor. Examples of the utility of the method are given. These include the determination of the rate of excretion of catecholamines in the urine, the effect of insulin on this rate, and the estimation of the catecholamine content of rat organs.

Radiological determination of the posterior limits of the temporal lobe for volumetric analysis

1999 ◽  
Vol 4 (1) ◽  
pp. 1-10 ◽  
Author(s):  
Colin P Doherty ◽  
Gloria E Meredith ◽  
Michael Farrell ◽  
James Toland ◽  
Hugh Staunton
Keyword(s):  
Temporal Lobe ◽  
Volumetric Analysis

Determination of the iron oxide content in bauxite: comparing ICP-OES with UV–VIS and volumetric analysis

2020 ◽  
Vol 75 (1) ◽  
pp. 389-396
Author(s):  
Gordana Ostojić ◽  
Dragica Lazić ◽  
Saša Zeljković
Keyword(s):  
Iron Oxide ◽  
Volumetric Analysis ◽  
Oxide Content ◽  
Iron Oxide Content ◽  
Icp Oes

scholarly journals Stitching of sensor-navigated 3D ultrasound datasets for the determination of large thyroid volumes – a phantom study

2018 ◽  
Vol 20 (4) ◽  
pp. 480 ◽  
Author(s):  
Martin Freesmeyer ◽  
Leonard Knichel ◽  
Christian Kuehnel ◽  
Thomas Winkens
Keyword(s):  
Ad Hoc ◽  
Clinical Performance ◽  
Three Dimensional ◽  
Thyroid Volume ◽  
Correlation Coefficients ◽  
3D Ultrasound ◽  
Volumetric Analysis ◽  
High Level ◽  
Clinical Equipment

Aims: Thyroid volume has to be measured in goiters prior to radioiodine treatment to calculate the needed amount of radioactivity. Modern clinical equipment for ultrasonography shows the trend to smaller probes, so that larger goiters do not fit any longer into the probe’s field of view. This study evaluated the feasibility and accuracy of stitching procedures applied to thyroid volumetric analysis performed using three-dimensional ultrasound (3D-US).Material and methods: Ad hoc thyroid phantoms of different shapes (regular, nodular, thickened isthmus) and volumes (ranging between 50 and 400 mL) were developed. In 15 such phantoms the left and right lobes were separately scanned, and the 3D-US datasets were then assembled (stitched) using predefined landmarks and dedicated software. Volumetric analysis was then assessed via a conventional ellipsoid model (em) and manual tracing (mt). The correlation of measured and reference volumes was determined using Pearson’s correlation coefficients and Bland and Altman limits of agreement.Results: The results showed a high level of agreement (with correlation coefficients ranging from 0.974 to 0.999) for all shapes and volumes tested, including the largest volume of 400 mL. The mt method, although more time consuming, proved superior to the em.Conclusions: Stitching-mediated thyroid volumetric analysis is accurate, and its clinical performance should be investigated in future studies

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