scholarly journals On the Reaction of Potassium Permanganate upon Cuprous Oxide in D lute Sulphuric Acid, and the Determination of Metallic Copper, Cuprous Oxide, and Cupric Oxide from this Mixture.

1923 ◽  
Vol 26 (9) ◽  
pp. 1123-1133
Author(s):  
D. Nishida ◽  
K. Hirabayashi
Keyword(s):  
Sulphuric Acid ◽  
Potassium Permanganate ◽  
Cuprous Oxide ◽  
Cupric Oxide ◽  
Metallic Copper

scholarly journals Stepwise determination of metallic copper, cuprous oxide and cupric oxide using redox-titrimetric methods.

1989 ◽  
Vol 38 (6) ◽  
pp. 263-266
Author(s):  
Takeshi SAKAMOTO ◽  
Hideomi HIGUCHI ◽  
Toshio KAWAGUCHI
Keyword(s):  
Cuprous Oxide ◽  
Cupric Oxide ◽  
Metallic Copper

VI. The glucoside constitution of proteid matter

1894 ◽  
Vol 54 (326-330) ◽  
pp. 53-57 ◽  
Keyword(s):  
Sulphuric Acid ◽  
Cupric Oxide ◽  
The Body ◽  
Long Time

For a long time I have adopted a process for separating the glycogen of the liver consisting in boiling with potash, pouring into alcohol, and collecting the precipitate. For the purpose of estimation, the precipitated glycogen was converted by means of sulphuric acid into glucose, the determination of which gave the information required. I afterwards applied the process to blood, and the various organs and tissues of the body, with the result that a more or less notable amount of cupric oxide reducing product was obtained, which I at the time looked upon as taking origin, as in the case of the liver, from glycogen.

The determination of ferrous iron in resistant silicates

1941 ◽  
Vol 26 (175) ◽  
pp. 116-118 ◽  
Author(s):  
Max H. Hey
Keyword(s):  
Sulphuric Acid ◽  
Potassium Permanganate ◽  
Dead Space ◽  
Ferrous Iron ◽  
Glass Tube ◽  
Fusion Cake ◽  
Macro Scale ◽  
A Current ◽  
Pyrex Glass Tube

The determination of ferrous iron in minerals, such as staurolite and kornerupine, which cannot be effectively dissolved by dilute sulphuric and hydrofluoric acids has been made possible on the macro-scale by the work of H. P. Rowledge; the mineral is fused with sodium fluoride and boric oxide at 900°C. in a sealed pyrex glass tube, the fusion cake dissolved in hot dilute sulphuric acid in a current of carbondioxide, and the solution titrated with potassium permanganate. We have met with no difficulty in applying the method on the macro-scale, but when only small amounts of a mineral are available several difficulties arise, and modifications become necessary.The air present in the sealed tube of a Rowledge fusion, using the quantities and dimensions he specifies, is already sufficient to oxidize about 3 to 5 mg. of ferrous oxide. But when the weight of the sample is reduced to 10 mg., it is not possible to reduce the dead-space in the tube in proportion ; it can hardly be reduced below about ¼c .c. which is sufficient to oxidize 0·3 mg. or 3% FeO and is likely to be more effective in this direction than on the larger scale, since the surface of the fusion is proportionally greater.

Colorimetric Determination of Amoxicillin in Pure and some Pharmaceutical Formulations Via Reaction with Potassium Permanganate as Oxidant Reagent

2019 ◽  
Vol 10 (02) ◽  
Author(s):  
Abbas Shebeeb Al-kadumi ◽  
Sahar Rihan Fadhel ◽  
Mohammed Abdullah Ahmed ◽  
Luma Amer Musa
Keyword(s):  
Potassium Permanganate ◽  
Pharmaceutical Preparations ◽  
Pharmaceutical Formulations ◽  
Atomic Emission ◽  
Basic Medium ◽  
Photometric Method ◽  
Colorimetric Determination ◽  
Spectrophotometric Methods ◽  
Label Claim

We proposed two simple, rapid, and convenient spectrophotometric methods are described for the determination of Amoxicillin in bulk and its pharmaceutical preparations. They are based on the measurement of the flame atomic emission of potassium ion (in first method) and colorimetric determination of the green colored solution for manganite ion at 610 nm formed after reaction of Amoxicillin with potassium permanganate as oxidant agent (in the second method) in basic medium. The working conditions of the methods were investigated and optimized. Beer's law plot showed a good correlation in the concentration range of 5-45 μg/ml. The detection limits and relative standared deviations were (2.573, 2.814 μg/ml) (2.137, 2.498) for the flame emission photometric method and (1.844, 2.016 μg/ml) (1.645,1.932) for colorimetric methods for capsules and suspensions respectively. The methods were successfully applied to the determination of Amoxicillin in capsules and suspensions, and the obtained results were in good agreement with the label claim. No interference was observed from the commonly encountered additives and expectancies.

Sign in / Sign up

Export Citation Format

Share Document