Polarographic Determination of Oxygen. Anomalous Current Encountered with Rapid-Dropping Mercury Electrode

1959 ◽  
Vol 31 (4) ◽  
pp. 509-513 ◽  
Author(s):  
J. H. Karchmer
Keyword(s):  
Mercury Electrode ◽  
Polarographic Determination ◽  
Dropping Mercury Electrode

Polarographic determination of selenium in tea leaves using a dropping mercury electrode

1996 ◽  
Vol 56 (2) ◽  
pp. 177-180 ◽  
Author(s):  
Guanghan Lu ◽  
Jianhua Liu ◽  
Yiping Hang ◽  
Fang Wang
Keyword(s):  
Mercury Electrode ◽  
Polarographic Determination ◽  
Tea Leaves ◽  
Dropping Mercury Electrode

POLAROGRAPHIC DETERMINATION OF THE GAMMA ISOMER OF BENZENEHEXACHLORIDE IN INSECTICIDES AND SOIL

1949 ◽  
Vol 27f (9) ◽  
pp. 368-371
Author(s):  
H. Grass ◽  
E. Y. Spencer
Keyword(s):  
Potassium Iodide ◽  
Supporting Electrolyte ◽  
Mercury Electrode ◽  
Polarographic Determination ◽  
Simple Method ◽  
Dropping Mercury Electrode

A precise and simple method for the determination of the gamma isomer of benzenehexachloride in commercial insecticides and soil by the dropping mercury electrode is outlined. A satisfactory supporting electrolyte consisted of 1% potassium iodide and a trace of gelatin in 50% ethanol.

Polarographic Determination of 7-Diethylamino-4-methylcoumarin

1995 ◽  
Vol 60 (5) ◽  
pp. 802-812
Author(s):  
Jiří Barek ◽  
Roman Hrnčíř ◽  
Josino C. Moreira
Keyword(s):  
Mercury Electrode ◽  
Differential Pulse ◽  
Polarographic Determination ◽  
Differential Pulse Polarography ◽  
Whitening Agent ◽  
Polarographic Behaviour ◽  
Pulse Polarography ◽  
Dropping Mercury Electrode ◽  
Technical Products

The polarographic behaviour of the title optical whitening agent was studied in aqueous-methanolic solutions. Conditions for its quantitation were found within the concentration regions of 10 to 100 μmol l-1 by tast polarography, 1 to 100 μmol l-1 by differential pulse polarography on the conventional dropping mercury electrode, and 0.1 to 10 μmol l-1 by differential pulse polarography on a static mercury drop electrode. The analytical procedures developed were applied to the determination of the compound in technical products.

Polarographic Determination of Menadione Sodium Bisulfite in Pharmaceutical Preparations

1973 ◽  
Vol 56 (6) ◽  
pp. 1460-1463
Author(s):  
Ana María Mayo ◽  
Osmar Nudelman
Keyword(s):  
Mercury Electrode ◽  
Pharmaceutical Preparations ◽  
Sodium Bisulfite ◽  
Polarographic Determination ◽  
Sample Treatment ◽  
Menadione Sodium Bisulfite ◽  
Dropping Mercury Electrode ◽  
Standard Deviations

Abstract Menadione sodium bisulfite is reduced at pH 4 and determined by polarography, using a dropping mercury electrode. The method is simple and rapid and does not require special sample treatment. Average recoveries (%) and standard deviations for menadione sodium bisulfite added to synthetic mixtures at levels of 0.50, 1.00, and 5.0 mg were 99.88 ±2.12, 101.99±2.08, and 100.27±2.53, respectively.

Polarographic Determination of Famotidine in Dosage Forms

1989 ◽  
Vol 72 (4) ◽  
pp. 549-551
Author(s):  
Juan A Squella ◽  
Gladys Valencia ◽  
Igor Lemus ◽  
Luis J Nunez-Vergara
Keyword(s):  
Sample Preparation ◽  
Mercury Electrode ◽  
Dosage Forms ◽  
Polarographic Determination ◽  
Proton Reduction ◽  
Dropping Mercury Electrode ◽  
Neutral Media ◽  
Precision And Accuracy

Abstract Famotidine, which cannot be electrochemically reduced at the dropping mercury electrode, exhibits catalytic proton reduction waves. The peak obtained by in-phase ac polarography in neutral media is of analytical interest. Recovery studies and individual tablet assays are described. Results show adequate precision and accuracy. Sample preparation is not time consuming, and no excipient separation is required.

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