Use of a Nafion Membrane Probe for Quick, On-the-Spot Determination of Ionic Copper Contamination Levels in Natural Waters

2000 ◽  
Author(s):  
John Foerster ◽  
Robert Lamontagne
Keyword(s):  
Natural Waters ◽  
Nafion Membrane ◽  
Copper Contamination ◽  
Membrane Probe ◽  
Ionic Copper ◽  
Contamination Levels

Removal of Ionic Copper Contamination from the Marine Environment

2002 ◽  
Author(s):  
Robert A. Lamontagne ◽  
John W. Foerster
Keyword(s):  
Marine Environment ◽  
Copper Contamination ◽  
Ionic Copper

Determination of Dimetridazole and Ipronidazole in Feeds at Cross-Contamination Levels

1988 ◽  
Vol 71 (3) ◽  
pp. 474-477 ◽  
Author(s):  
Duane D Hughes
Keyword(s):  
Thin Layer ◽  
Rapid Method ◽  
Aqueous Phase ◽  
Borate Buffer ◽  
Cross Contamination ◽  
Chromatographic System ◽  
Arsanilic Acid ◽  
Contamination Levels ◽  
Benzene Extract

Abstract A rapid method for the determination of dimetridazole and ipronidazole in feeds is described. The compounds are extracted from a borate buffer (pH 8.65) with benzene, partitioned into IN HC1, and then partitioned back into benzene from a basic aqueous phase. The benzene extract is concentrated and injected onto a nonpolar (Apiezon L) gas chromatographic column for determination by 63Ni electroncapture detection. Recoveries from feeds of various composition, spiked at 0.2 ppm with both dimetridazole and ipronidazole, ranged from 70 to 115%; for the same feeds spiked at 1 ppm or more, the recoveries were greater than 80%. Carbadox, furazolidone, levamisole, oxytetracycline, chlortetracycline, sulfamethazine, sulfaquinoxaline, arsanilic acid, piperazine, penicillin, and commonly added vitamins and minerals do not interfere. A 2-dimensional thin layer chromatographic system is presented as a means of additional identification.

Determination of antimony(III), antimony(V), and methylantimony species in natural waters by atomic absorption spectrometry with hydride generation

1981 ◽  
Vol 53 (12) ◽  
pp. 1766-1771 ◽  
Author(s):  
Meinrat O. Andreae ◽  
Jean Francois. Asmode ◽  
Panayotis. Foster ◽  
Luc. Van 't dack
Keyword(s):  
Atomic Absorption Spectrometry ◽  
Atomic Absorption ◽  
Natural Waters ◽  
Hydride Generation ◽  
Absorption Spectrometry

Electrochemical determination of arsenic in natural waters using carbon fiber ultra-microelectrodes modified with gold nanoparticles

Talanta ◽  
2017 ◽  
Vol 166 ◽  
pp. 198-206 ◽  
Author(s):  
Patricio Carrera ◽  
Patricio J. Espinoza-Montero ◽  
Lenys Fernández ◽  
Hugo Romero ◽  
José Alvarado
Keyword(s):  
Gold Nanoparticles ◽  
Carbon Fiber ◽  
Natural Waters ◽  
Electrochemical Determination
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