scholarly journals Studies on Organic Reagents for the Colorimetric Analysis of Germanium. I. Reactions between Germanium and Some Organic Compounds

1956 ◽  
Vol 29 (5) ◽  
pp. 635-640 ◽  
Author(s):  
Kenjiro Kimura ◽  
Kazuo Saito ◽  
Masako Asada
Keyword(s):  
Organic Compounds ◽  
Colorimetric Analysis ◽  
Organic Reagents

scholarly journals Determination of Stability Constants of Iron(II) Complexes of as-Triazines Containing Ferroin-Yielding Chromogens

2020 ◽  
Vol 68 (2) ◽  
pp. 137-142
Author(s):  
Md Anwarul Islam ◽  
Shahida Begum ◽  
Maksuda Parvin ◽  
Md Musharraf Hossain
Keyword(s):  
Stability Constant ◽  
Organic Compounds ◽  
Stability Constants ◽  
Molar Absorptivity ◽  
Molar Ratio ◽  
Iron Determination ◽  
Organic Reagents ◽  
The Mean ◽  
Higher Sensitivity

With the aim of determining stability constants of iron(II) complexes of 3-(2-pyridyl)-5,6-diphenyl-1,2,4-triazine (PDT), 3-(2-pyridyl)-5,6-bis(p-methoxyphenyl)-1,2,4-triazine (PBMPT) and 3-(2-pyridyl)-5,6-bis(4-biphenyl)-1,2,4-triazine (PBBT), these organic reagents were prepared from commercially available relatively cheaper reactants. The absorptiometric characteristics of iron(II) complexes of these organic compounds; λmax and molar absorptivity (€max) were determined. The composition and stability constants of these iron(II) complexes were determined by both molar ratio and Job’s continuous variation methods. The mean logK values for iron(II) complexes of PDT, PBMPT and PBBT were found 16.48, 17.48 and 15.54 respectively reflecting the formation of very stable complexes. These are well comparable with the reported values for the iron(II) complexes of 2,2’-bipyridine, 1,10- phenanthroline, Ferrozine and Ferene. Higher sensitivity and stability constant values reflects the possibility of application of these compounds as promising chromogenic reagents for iron determination. Dhaka Univ. J. Sci. 68(2): 137-142, 2020 (July)

ORGANIC REAGENTS FOR PLATINUM METALS: II. THE GRAVIMETRIC DETERMINATION OF RHODIUM

1949 ◽  
Vol 27b (2) ◽  
pp. 72-75 ◽  
Author(s):  
R. L. Haines ◽  
D. E. Ryan
Keyword(s):  
Acetic Acid ◽  
Nitric Acid ◽  
Organic Compounds ◽  
Atomic Weight ◽  
Similar Type ◽  
Platinum Metals ◽  
Organic Reagents ◽  
Molecular Weights ◽  
Gravimetric Determination

Rhodium may be precipitated quantitatively with 2-mercaptobenzoxazole or 2-mercaptobenzothiazole. An acetic acid precipitating medium is preferred; slight variations in the concentration of acid, when nitric acid was used, caused low results. Several similar type organic compounds showed no advantages over the above two. The complex appears to have three molecular weights of the reagent combined with one atomic weight of rhodium.

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