On the determination of true dissolution rate parameters from rotating disc experiments

1983 ◽  
Vol 15 (1) ◽  
pp. 87-95 ◽  
Author(s):  
Martin Nicklasson ◽  
Arne Brodin ◽  
Lars-Olof Sundelöf
Keyword(s):  
Dissolution Rate ◽  
Rotating Disc

Drug dissolution rate measurements – evaluation of the rotating disc method

2009 ◽  
Vol 14 (4) ◽  
pp. 400-408 ◽  
Author(s):  
Erik Kaunisto ◽  
Bernt Nilsson ◽  
Anders Axelsson
Keyword(s):  
Dissolution Rate ◽  
Drug Dissolution ◽  
Rotating Disc

scholarly journals Proposal for a mercury isolation procedure using cold vapor method in combination with voltammetric determination using a rotating gold electrode

2007 ◽  
Vol 5 (2) ◽  
pp. 479-495 ◽  
Author(s):  
Jaromíra Chýlková ◽  
Renáta Šelešovská-Fadrná ◽  
Jaroslava Machalíková
Keyword(s):  
Detection Limit ◽  
Water Solution ◽  
Sample Volume ◽  
Voltammetric Determination ◽  
Mercury Determination ◽  
Disc Electrode ◽  
Rotating Disc ◽  
Electrochemical Cycling ◽  
Pre Treatment

AbstractThe optimal process of pre-treatment and activation of gold rotating disc electrode (AuRDE) before voltammetric determination of mercury is proposed. This treatment encompasses polishing of the electrode surface, electrochemical cycling, and activation. This procedure both increases determination sensitivity as well as improves determination reproducibility. The detection limit on the working electrode achieved using this approach amounted to 8.26·10−10 mol L−1for direct mercury determination in water solution (applying 200 s running accumulation). The procedure of the quantitative mercury isolation from complicated sample matrix was developed as well. It provides better selectivity and significant increase of sensitivity of mercury determination. In case of mercury isolation from one liter of water the detection limit is 6.23·10−11 mol L−1 (analyzing a greater sample volume the determined concentration could be lower).

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