45 mM potassium persulphate
and allowing the mixture to stand in the dark at room temperature for 16 h before use.
3-] concentration using the persulphate
digestion procedure at 120[degrees]C (Pujo-Pay & Raimbault, 1994).
5% w/v) 100 [micro]l 100 [micro]l Span 80 (10% v/v) 30 [micro]l 30 [micro]l TEMED (20% v/v) 20 [micro]l 20 [micro]l Double distilled water 330 [micro]l 330 [micro]l NaCMC 147 mg 196 mg APS (20% w/v) 45 [micro]l 45 [micro]l Sodium bicarbonate 200 mg 200 mg AM: Acrylamide; AA: Acrylic acid; BIS: N,N'-methylenebisacrylamide, APS: Ammo-nium persulphate
, TEMED: N,N,N',N'-tetramethylethylenediamine Table 2: Apparent density of SPHCs Batch Apparent density (g/[cm.
(APS), sodium hydrosulphite (SHS), and sodium dodecylsulfate (SDS) were purchased from Longxi Fine Chemical, and were used without further purification.
Cabrera ML, Beare MH (1993) Alkaline persulphate
oxidation for determining total nitrogen in microbial biomass extracts.
All reaction components excluding monomers were used without further purification: SDS (BHD), PVOH (Cevol), potassium persulphate
(Aldrich), sodium bicarbonate (BHD), dodecanethiol (Aldrich).
Most TOC instruments measure organic levels by determining the amount of carbon dioxide produced when the organic sample is fully oxidized but Ionics now offer three main types of oxidation technique: high temperature catalytic oxidation, UV, and UV persulphate
, for use in the laboratory or as on-line units.
(APS) was used as polymerization initiator and obtained from Ranbaxy laboratories Ltd.
Of the total monomer feed, 5% was precharged at 85[degrees]C and an emulsified monomer feed was added during 90 min at 85[degrees]C using ammonium persulphate
as an initiator.
15]N from legume residues in soils of differing textures: measurement by persulphate
oxidation and ammonia diffusion methods.
They wanted to replace an earlier UV persulphate
TOC system, which had bene subject to plugging and needed considerable operator intervention.
Tenders are invited for Supply of silver nitrate,Barium chloride dehydrate, sodium chloride ar, ammonium persulphate
ar, di sodium edta commercial grade