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 [13].
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 (p/v).
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.
Sodium
persulfate 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 initiators.
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 solution.