Ammonium Acetate Thiocyanate

Determination. To an aliquot of the silver(I) solution containing between 10 and 50 pg of silver, add sufficient EDTA to complex all those cations present which form an EDTA complex. If gold is present (>250 xg) it is masked by adding sufficient bromide ion to form the AuBr4 complex. Cyanide, thiocyanate or iodide ions are masked by adding sufficient mercury(II) ions to complex these anions followed by sufficient EDTA to complex any excess mercury(II). Add 1 mL of 20 per cent ammonium acetate solution, etc., and proceed as described under Calibration. 

Sodium perchlorate monohydrate Sodium m-periodate Sodium sulfide Sodium thiocyanate Sodium thioglycolate Stannous chloride anhydrous Sulfur chloride Sulfurous acid Thiodiqlycolic acid Thiourea Thymolphthalein Zinc oxide Zinc sulfate reagent, analytical chemistry Ammonium acetate Copper oxide (ic) Cupric sulfate anhydrous Ferric nitrate nonahydrate Furfural... 

Dissolve 685 g ammonium thiocyanate and 77 g ammonium acetate in max. 330 ml water, heating gently, add 5 ml bromophenol blue solution and set to pH 5.5 with concentrated acetic acid. 

A sensitive method for the determination of thiosulfate, thiocyanate and poly-thionates in a mixture with photometric detection at 230 nm illustrates further the applicability of ion-pair chromatography [9]. Excellent resolution of a complex mixture was obtained on a C18 column with a mobile phase of 6 mM tetrapropyl-ammonium acetate pH, 5.0, in 20-80% methanol-water (Figure 9.3). 

The detection of cations on chromatoplates is performed by spraying the solutions of the detection reagents at an appropriate concentration level, followed by visualization of the separated zones. The spraying reagents used as detectors include, 0.04-1 % dithizone in chloroform or carbon tetrachloride, 1% ethanolic solution of dimethylglyoxime, 1% aqueous solution of potassium ferrocyanide, 1% aqueous aluminon containing sufficient amount of ammonium acetate, 1% alcoholic solution of alizarine Red S, freshly prepared 0.1% solution of stannous chloride in 2 M HCl, hydrogen sulfide gas, aqueous saturated solution of ammonium sulfide, aqueous solution of ammonium thiocyanate and dilute solutions of diphenylcarbazide, p-nitroso-yV,A -dimethylaniline and sodium rhodizonate. 

ALUMINUM ALUM ALUMINUM CHLORIDE ALUMINUM FLUORIDE ALUMINUM HYDROXIDE ALUMINUM OXYCHLORIDE ALUMINUM NITRATE ALUMINUM SULFATE AMMONIA (GAS-DRY) AMMONIUM ACETATE AMMONIUM ALUM AMMONIUM BIFLUORIDE AMMONIUM CARBONATE AMMONIUM CHLORIDE AMMONIUM HYDROXIDE AMMONIUM HYDROXIDE, 10% AMMONIUM HYDROXIDE, 28% AMMONIUM METAPHOSPHATE AMMONIUM NITRATE AMMONIUM PERSULFATE AMMONIUM PHOSPHATE AMMONIUM SULFATE AMMONIUM SULFIDE AMMONIUM THIOCYANATE ANTHRAOUINONESULFONIC ACID... 

Aminoethanol 2-Aminoisobutyric Acid Ammonia Ammonia Solution Ammonium Ammonium Acetate Ammonium Alum Ammonium Bicarbonate Ammonium Bichromate Ammonium Bifluoride Ammonium Bromide Ammonium Carbonate Ammonium Chloride Ammonium Dichromate Ammonium Fluoride Ammonium Glycolate Ammonium Hydrogen Carbonate Ammonium Hydrogen Fluoride Ammonium Hydrosulfide Ammonium Hydroxide Ammonium Hyposulfite Ammonium Iron Sulfate Ammonium Molybdate Ammonium m-Phosphate Ammonium Nitrate Ammonium o-Phosphate Ammonium Oxalate Ammonium Peroxydisulfate Ammonium Persulfate Ammonium Phosphate Ammonium Phosphate Dibasic Ammonium Rhodanide Ammonium Sulfamate Ammonium Sulfate Ammonium Sulfide Ammonium Thiocyanate Ammonium Thioglycolate Ammonium Thiosulfate... 

Acid dyes can be ptinted on acetate, produciag prints with very good wetfastness and exceptional brightness. The print paste contains a solvent, urea, and ammonium thiocyanate, as a fiber swelling agent to aid ia diffusion of the dye. Again, fixation and scouting foUow the procedures for polyamide. 

Chloro-a,/3-unsaturated aldehydes condense with ammonium thiocyanate to give isothiazoles (76EGP122249). 2,3-Diphenylcyclopropenone reacts with iV-sulfinyl-cyclohexylamine in the presence of nickel tetracarbonyl to give the isothiazolin-3-one 1-oxide (197) (79SST(5)345). Cholesteryl acetate reacts with trithiazyl trichloride in pyridine to give the isothiazolo steroid (198) (77JCS(P1)916). 

According to REM, hydrazine hydrate Is reacted with 2 mols of ammonium thiocyanate to produce 1,2-bislthlocarbamoyl) hydrazine which by loss of ammonia and rearrangement produces 5-amino-2-mercapto-1,3,4-thiadiazole. That compound is acetyied with acetic anhydride. 

The amount of reddish-purple acid-chloranilate ion liberated is proportional to the chloride ion concentration. Methyl cellosolve (2-methoxyethanol) is added to lower the solubility of mercury(II) chloranilate and to suppress the dissociation of the mercury(II) chloride nitric acid is added (concentration 0.05M) to give the maximum absorption. Measurements are made at 530nm in the visible or 305 nm in the ultraviolet region. Bromide, iodide, iodate, thiocyanate, fluoride, and phosphate interfere, but sulphate, acetate, oxalate, and citrate have little effect at the 25 mg L 1 level. The limit of detection is 0.2 mg L 1 of chloride ion the upper limit is about 120 mg L . Most cations, but not ammonium ion, interfere and must be removed. 

A number of methods have been proposed for the detection of rancidity. The determination of active oxygen consists of dissolving the fat in a suitable medium such as chloroform and acetic acid, adding potassium iodide, and titrating the liberated iodine with a standard thiosulfate solution (16, 20). This is perhaps the most widely used method at the present time. Another procedure which has been proposed for the detection of peroxides employs ferrous ammonium sulfate and ammonium thiocyanate in acetone. The resulting red color of ferric thiocyanate is measured spectrophotometrically, and is said by the authors to yield more reproducible results than do the usual titration methods (21). 

Alternatively, the reaction of 93c (R = n-Bu) with ammonium thiocyanate in refluxing acetic acid gave the ammonium salt of N-phosphonomethylthiohydantoin 99 in moderate isolated yield (2). 

Dipping solution Dissolve SOO mg ammonium thiocyanate in 45 ml acetone and add 5 ml glacial acetic acid [1]. 

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