Metallographic analysis was made using an Reichert microscope at magnifying powers of 500-2000 times, in the section of the extruded samples, using an ammonium persulphate
solution for the metallographic attack.
They are: ammonium persulphate
, potassium persulphaute and sodium persulphate
All chemicals used for the synthesis of Al-PAM, including acrylamide, ammonium carbonate, aluminum chloride, ferric chloride hexahydrate, sodium bisulphite, ammonium persulphate
, and acrylamide, were purchased from Fisher Scientific (Ottawa, Canada).
The content of TP was determined after persulphate
oxidation as P[O.
was obtained from May and Baker (Dagenham, UK).
The monitoring system uses ultra-violet promoted persulphate
oxidation to convert the organic carbon present in the sample stream into carbon dioxide.
The drama unfolded at Brenntag UK in Oak Lane, Kingswinford, after bags stored in the yard and containing ammonium persulphate
powder crystals spontaneously caught fire.
Tenders are invited for Ammonium Persulphate
, Ar/Excellar Grade In 500G Packing.
Briefly, the mixture solution of 5 ml of 7 mM ABTS and 80 [micro]l of 140 mM potassium persulphate
was allowed to stand in the dark at room temperature for 12-16 h before used.
(Merck, Germany) was used as an oxidant.
Total dissolved nitrogen (DN) and phosphorus concentrations were measured after the persulphate
digestion procedure at 120[degrees]C (Pujo-Pay & Raimbault, 1994).
Acrylic acid, N,N'-methylenebisacrylamide, Span 80, ammo-nium persulphate
, and N, N, N', N'-tetramethylethylenediamine, and NaCMC were purchased from SD Fine Chem Ltd, Mumbai, India.