The pre-formed ABTS*+ solution was prepared by mixing ABTS and potassium persulfate
solutions followed by dilution with distilled water until the absorbance of the ABTS*+ stock solution at 735 nm was placed in between 0.7 and 1.0.
After reaching 75[degrees]C, a pre-emulsion of BA, MMA, and HEMA (when required) with Triton X-200 (3.45 g) was charged in the flask followed by the addition of a 2 wt% aqueous solution of ammonium persulfate
Using sodium salt of persulfate
instead of the potassium salt produced higher yield.
Geological Survey National Water Quality Laboratory: Evaluation of alkaline persulfate
digestion as an alternative to Kjeldahl digestion for the determination of total and dissolved nitrogen and phosphorus in water.
([K.sub.2][S.sub.2][O.sub.8]) oxidation (PO) methods have been introduced as alternatives for measuring total N in water and soil extracts (Ebina et al.
Table 1 -- Latex Formulation for Coatings Ingredients Weight (g) % BOTM Kettle Charge Deionized water 200.6 -- Anionic surfactant 5.0 0.3 Monomer Emulsion Deionized water 181.3 -- Anionic surfactant 20.0 1.2 Methyl methacrylate 260.0 52.0 Butyl acrylate (a) 235.0 47.0 Methacrylic acid 5.0 1.0 Initiator Solution Deionized water 98.0 -- Ammonium persulfate
2.0 0.4 Total 1006.9 -- (a) PAM-100 or 200 at 1-6% were used to replace BA in evaluating phosphate monomers.
Filtrate from each incubation was analyzed for nitrate, ammonium, and total N using a Lachat 8000 flow-injection autoanalyzer with in-line persulfate
digestion (7, 8).
The final concentration of each gel is 6% (w/v) acrylamide/bis-acrylamide (19:1), 0.5 X TBE buffer (Sambrook et al., 1989), 0.07% (w/v) ammonium persulfate
, and 0.08% (w/v) TEMED.
Q: We use 10% ammonium persulfate
, 2% sulfuric acid and mechanical agitation in the bath for the micro etch of our printed circuit boards (PCBs) before nickel plating.
Continuously operating ultraviolet-promoted persulfate
oxidation is used to convert organic carbon to carbon dioxide.
Our study used four cationic starches (CS) with different degrees of substitution (DS) and viscosity, ammonium persulfate
starch, and oxidized starch.
We analyzed extracts for N using alkaline persulfate
oxidation (Cabrera and Beare 1993).