So he pursued a strategy of taking [Ag.sup.1+] ions from a solution of silver nitrate (AgN[O.sub.3]) and reacting them with strong oxidizing agents such as ammonium persulfate
([(N[H.sub.4]).sub.2][S.sub.2][O.sub.8]) or potassium persulfate
([K.sub.2][S.sub.2][O.sub.8]) in the hope of converting them to [Ag.sup.2+] or [Ag.sup.3+].
Sodium dodocylsulfate (Fluka) Ammonium persulfate
(Merck) Glycine (Fluka)
Urine was digested with ammonium persulfate
, the reduction of ceric ammonium sulfate (yellow) to cerous form (colourless) by iodide, and its detection was done by rate of colour disappearance (Sandell-Kolthoff reaction)12 .
Urine samples were collected from each child and urinary iodine concentrations were determined by the Ammonium Persulfate
Digestion method .
The samples were analyzed for iodine concentration using spectrophotometric measurement of iodine in the Sandell-Kolthoff reaction which involved an iodine catalyzed reduction of yellow ceric (IV) ions to colourless cerous (III) ions by ammonium persulfate
(Pino et al., 1996).
Gels were used to a 4% (1.25 ml Tris-HCl 0.5 M at pH 6.8; 50 [micro]l 10% SDS (p/v), 0.65 ml of 30% acrylamide (p/v), 2.5 [micro]l of TEMED and 50 [micro]l of 10% ammonium persulfate
(p/v); for the concentration section and 10% for the separation section (2.5 ml Tris-HCl 1.5 M at pH 8.8; 3.3 ml of acrylamide/bisacrylamide to 30 % (p/v), 100 [micro]l of 10% SDS (p/v), 5 [micro]l of TEMED and 50 [micro]l of 10% ammonium persulfate
The stock ABTS + solution was prepared by mixing ABTS and potassium persulfate
solutions followed by dilution with distilled water until the absorbance at 735 nm was approximately 0.7.
will be injected into the soil, Mr.
The process includes forming a monomer mixture comprising at least one monomer capable of forming a superabsorbent polymer, a crosslinking agent, an initiator system that contains 0 to 300 ppm of a persulfate
, a photoinitiator and, optionally, water.
This company is said to be a specialist in customized organic peroxides and inorganic persulfate
Butyl Acrylate (BA), Methyl Methacrylate (MMA), Hydroxyethyl Methacrylate (HEMA), Ammonium Persulfate
(APS), and Sodium Bicarbonate were technical-grade chemicals purchased from Aldrich Chemical and used as received.
After surfacing mill and polishing the surfaces were treated with a 20% Ammonium Persulfate