Ammonia test for

The following tests, details of which are given on p. 4, should be performed Trinder s test for salicylates, cresol-ammonia test for paracetamol, FPN reagent for phenothiazines, Fujiwara test for trichloro-compounds, and the dithionite test for paraquat and diquat. In addition, the content of alcohol should be determined by gas chromatography (p. 19). 

This sample should be examined visually for colour and the presence of tablet residues or excipients (often maize starch). The odour should be noted as tiiis may indicate the presence of alcohols, aldehydes, ketones, phenols, cyanide, ethchlorvynol, nicotine, etc. The following tests, details of which are given on p. 5, should be performed Trinder s test for salicylates, cresol-ammonia test for paracetamol, FPN reagent for phenothiazines, Fujiwara test for trichloro-compounds, and the diphenyl- nine test for oxidising agents. In addition, tiie Reinsch Test for heavy metals (p. 57) should be carried out, and a diluted, filtered extract examined by direct ultraviolet spectrophotometry for drugs with highyl values. 

ISO 6957, Copper Alloys—Ammonia Test for Stress Corrosion Resistance, Geneva, Switzerland, 1988. 

Mattsson, E., Holm, R., and Hassel, L., Ammonia Test for Stress Corrosion Resistance of Copper AHoys- The Use of Synthetic Environnwnts for Corrosion Testing, ASTM STP 970, ASTM International, West Conshohocken, PA, 1988. 

Determination of resistance to intergranular corrosion of stainless steels—Part 2 Ferritic, austenitic and ferritic-austenitic (duplex) stainless steels—Corrosion test in media containing sulfuric acid Corrosion of metals and alloys— Determination of dezincification resistance of brass Copper alloys— Ammonia test for stress corrosion resistance Corrosion tests in artificial atmosphere—General requirements... 

The thiocyanate ion SCN forms an intensely red-coloured complex (most simply represented as [Fe(SCN)(H20)5] ) which is a test for iron(III). However, unlike cobalt(III), iron(lll) does not form stable hexammines in aqueous solution, although salts containing the ion [FefNHj) ] can be obtained by dissolving anhydrous iron(III) salts in liquid ammonia. 

The reactions of aqueous solutions of nickel(II) salts with hydroxide ions, with excess ammonia, with sulphide ion and with dimethyl-glyoxime (see above) all provide useful tests for nickel(II) ions. 

Copper(II) ions in aqueous solution are readily obtained from any copper-containing material. The reactions with (a) alkali (p. 430), (b) concentrated ammonia (p 413) and (c) hydrogen sulphide (p. 413) provide satisfactory tests for aqueous copper(II) ions. A further test is to add a hexacyanoferrate(II) (usually as the potassium salt) when a chocolate-brown precipitate of copper(II) hexacyanoferrate(II) is obtained ... 

The dibydrochloride salt is used as a photographic developer. It also is employed as an intermediate in the manufacture of fur dyes, in hair dyeing, as a reagent in testing for ammonia and formaldehyde, and as an oxygen scavenger in water to prevent boiler corrosion (173). 

Supercritical fluid solvents have been tested for reactive extractions of liquid and gaseous fuels from heavy oils, coal, oil shale, and biomass. In some cases the solvent participates in the reactions, as in the hydrolysis of coal and heavy oils with water. Related applications include conversion of cellulose to glucose in water, dehgnincation of wood with ammonia, and liquefaction of lignin in water. 

Add dilute ammonia solution until a faint permanent turbidity is obtained and then clear the solution by careful addition of a little dilute nitric acid. To the boiling solution add a slight excess of a solution of pure pyrogallol in air-free water. Continue boiling for a short time, test for completeness of precipitation and filter. Wash the precipitate with 0.05M nitric acid and then with water. Dry at 105 °C and weigh as Bi(C6H303) (Section 11.20). 

Figure 9. A coated and uncoated 1-gallon, high density bottle under test for oxygen permeation inward. Copper and ammonia solution in the container are chemically influenced by entering oxygen, which provides a quantitative basis for the measurement.

The treatment of sulfonyl chlorides with ammonia or amines is the usual way of preparing sulfonamides. Primary amines give N-alkyl sulfonamides, and secondary amines give N,N-dialkyl sulfonamides. The reaction is the basis of the Hinsberg test for distinguishing between primary, secondary, and tertiary amines. N-Alkyl sulfonamides, having an acidic hydrogen, are soluble in alkali, while N,N-dialkyl sulfon-... 

Chang et al. conducted pilot scale tests in a corona radical shower system with ammonia injection for simultaneous removal of NO and S02 from coal boiler flue gases [61]. The corona radical shower system used had dimensions of 2.1 x 1.8 x 2m3 and consisted of 20 parallel flow channels with five multiple nozzle corona electrodes per... 

Ergotamine tartrate (lOg) is added to a stirred de aerated (nitrogen stream) solution of 38 g potassium hydroxide in 100 ml of methanol and 200 ml of water. The solution turns pink to red. The solution is heated to reflux and the methanol is slowly removed using a partial takeoff. Methanol is allowed to distill until the pot temperature reaches 90-95° C. The mixture is then maintained at total reflux until the evolution of ammonia ceases (hold pH paper in outlet of reflux condenser to test for ammonia). Nitrogen should be bubbled through the mixture to entrain the ammonia. 

A sample is tested for the presence of the Hg22+ ion. This ion, along with others, may be precipitated with chloride ion. If Hg22+ is present in the chloride precipitate, a black color will form upon treatment with aqueous ammonia. The balanced net ionic equation for the formation of this black color is ... 

Zinc Sulphate Dissolve 2.5 g in sufficient C02-free DW to produce 50 ml. Dilute 2 ml of this soln. to 10 ml with DW, add 2 ml of a 20% w/v soln. of iron-free-Citric acid and 0.5 ml of thioglycollie acid, mix, make alkaline with iron-free-ammonia solution, dilute to 50 ml with DW and allow to stand for 5 minutes. Complies with the limit test for iron. 

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