scholarly journals Chloroform extraction of trace nutrients as oxinates from soil extracts for spectrographic analysis

1960 ◽  
Vol 32 (1) ◽  
pp. 223-228
Author(s):  
Osmo Mäkitie
Keyword(s):  
Trace Metals ◽  
Chloroform Solution ◽  
Soil Extract ◽  
Hydrogen Ion ◽  
Ion Concentration ◽  
Spectrographic Analysis ◽  
Hydrogen Ion Concentration ◽  
Soil Extracts ◽  
Copper Manganese ◽  
The Common

The experiments show that under these conditions the common trace nutrients, cobalt, copper, manganese, molybdenum and zinc are sufficiently completely extracted as chelates by shaking the soil extract with oxine-chloroform solution. The hydrogen ion concentration of the extract and the concentration of oxine in chloroform have decisive effects on the extractability. Using the reported and discussed procedure it is possible to separate the common trace metals from the major soil extract constituents, especially for spectrographic analysis.

scholarly journals THE REACTION OF HUMAN BILE AND ITS RELATION TO GALL STONE FORMATION

1929 ◽  
Vol 49 (4) ◽  
pp. 681-694 ◽  
Author(s):  
John G. Reinhold ◽  
L. Kraaer Ferguson
Keyword(s):  
Gall Bladder ◽  
Stone Formation ◽  
Gall Stone ◽  
Hydrogen Ion ◽  
Ion Concentration ◽  
Hydrogen Ion Concentration ◽  
Human Bile ◽  
Complete Obstruction ◽  
Consistent Change ◽  
The Common

1. The human gall bladder acidifies the bile. In this respect its action is similar to that of the gall bladders of lower animals, previously described by other workers. 2. The hydrogen ion concentration of gall bladder bile is increased considerably in cases of obstruction of the common or cystic ducts. The highest values were found following complete obstruction. 3. The occurrence of gall stones was not associated with a consistent change in the hydrogen ion concentration of the gall bladder bile.

On the measurement of hydrogen-ion concentrations in soil by means of the quinhydrone electrode

1924 ◽  
Vol 14 (2) ◽  
pp. 232-239 ◽  
Author(s):  
Einar Biilmann
Keyword(s):  
Colorimetric Method ◽  
The Other ◽  
Hydrogen Ion ◽  
Ion Concentration ◽  
Hydrogen Ion Concentration ◽  
Soil Extracts ◽  
Important Method ◽  
Ion Concentrations ◽  
Soil Mixtures

The measurement of the hydrogen-ion concentration of soils often presents great difficulties. When ordinary hydrogen electrodes are used, constant potentials are, in many cases, only obtained after hydrogen has been passed for several hours, while in many instances hydrogen electrodes cannot be used at all. The other important method of determining “pH,” the colorimetric method, can only be used in testing clear and almost colourless soil extracts, but not in testing soil mixtures.

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