Ceric ammonium sulfate

Test T. Dissolve 10 mg of primaquine diphosphate in 5 mL of water and add 1 mL of a 5% solution of ceric ammonium sulfate in dilute nitric acid, a violet color is produced (distinction from chloroquine) [2]. 

Ceric ammonium sulfate, 5 674 Ceric fluoride, 5 674 Ceric hydroxide, 5 676 Ceric oxide, 5 670, 675 Ceric rare earths (RE), 74 631 Ceric sulfate, 5 674 Ceric sulfate method, for tellurium determination, 24 415 Cerium (Ce), 5 670-692 74 630, 63 It, 634t. See also Cerium compounds analysis, 5 679-680 color, 7 335... 

Cerium(lV) ammonium sulfate Ceric ammonium sulfate [7637-03-8] hydrate [10378-47-9] anhydrous... 

Add to the flask D, exactly 5 ml of ceric ammonium sulfate from the burette A, lower the bulb G to the vicinity of the 30 ml mark °f the gas burette E. Shake the flask D(to-S her with the clamp and stand) vigorously... 

After an induction period of 5 to 10 min with magnetic stirring, oscillations can be initiated by adding 1 mL of ceric ammonium sulfate solution. The reaction may need more Ce4+ over a 5-min period to initiate oscillations. 

Ceric-Ammonium Sulfate or Cerium-Ammonium Sulfate. See under Sulfates... 

Alcohols Ceric ammonium sulfate (or nitrate) Yellow/green spots on red background 1, 3... 

Ceric ammonium sulfate A 1% solution of ceric ammonium sulfate in strong acids (phosphoric, nitric) is sprayed on the plate to yield yellow/green spots on a red background, after heating at 105°C (10 min). 

The ceric ammonium sulfate, toluene, methanol, sodium hydroxide, sulfuric acid and hydrochloric acid used were all of reagent grade (Fisher Scientific Co.). A low oxygen grade of nitrogen (less than 0.5 ppm oxygen), obtained from Airco Industrial Gases, was employed. 

Determination of Adsorbed Ceric Ion. In determining the amount of ceric ion adsorbed on the graft copolymers the volumetric titration was conducted. Here, a given excess amount of ferrous sulfate solution (0.01 N) was added into the aqueous solution of hydrolysis and then the solution was back-titrated with 0.01 IT ceric ammonium sulfate in a 1 IT sulfuric acid solution using o-phenanthroline as an indicator. In so doing the amount of ceric ion adsorbed on the grafted bamboo sample could thus be determined. 

Sodium bisulfite-china clay proved to be an efficient initiator for homopolymerization and graft polymerization of methyl methacrylate onto cellulose. Grafting reactions using ceric ammonium sulfate, sodium bisulfite-soda lime glass or -china clay are inhibited or retarded on adding soda lignin to the grafting medium. 

The extent of inhibition and retardation depends on the amount of added lignin, the initiator used and the grafting temperature. Lignin in-situ of the lig-nocellulosic substrate effects inhibition or retardation only on using ceric ammonium sulfate as initiator. 

The ceric consumption was determined according to the method of Mino and Kaizerman (10) as nanomole ceric ammonium sulfate per 100 g cellulose. 

Grafting in Presence of Added Lignin. Ceric ammonium sulfate is an effective initiator for grafting polyethyl acrylate and polyacrylonitrile onto pure celluloses (8), while sodium... 

Figure 4. Rate of grafting. Conditions initiator, ceric ammonium sulfate (0.08 g/100 mL, 1% HzSOi) monomer, acrylonitrile 30°C. Lignin (g%) for crude...

Figure 6. Grafting rate of semichemical pulp. Conditions initiator, ceric ammonium sulfate (0.08 g/100 mL, 1% HsSO 30°C. Key (monomer) O—O, acrylonitrile — , ethyl acrylate. Grafting rate of extracted bagasse. Conditions monomer, ethyl acrylate 60°C. Key (initiator, ceric ammonium sulfate) X—X, 0.08 g/100 mL, 1% H,SOi ----------------------b 0.10 g/100 mL, 1% H2SOt.

Figure 7. Ceric ammonium sulfate consumption for cotton linter O—O, 30°C — , 60°C and for semichemical pulp - ---------30°C X—X 60°C.

Oxidation of arenes This oxidant is somewhat superior to CrOs for oxidation of arenes to quinones but less efficient than ceric ammonium sulfate (8,80-81). An example is the oxidation of naphthalene to 1,4-naphthoquinone in 75% yield. 

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