Silver nitrate chromatography

Escherichia col1. Phosphatidylserine from bovine brain has been separated into molecular species by silver nitrate chromatography for study by 100 MHz Fourier transform NMR spectroscopy. ... 

One of the inconveniences of this method is the formation of olefinic side products, (see below) but the desired saturated compounds can be readily isolated by chromatography on silver nitrate impregnated silica gel... 

Laboratory method using porous polymer adsorbent tubes, thermal desorption and gas chromatt raphy MDHS 32 Dioctyl phthalates in air Laboratory method using Tenax adsorbent tubes, solvent desorption and gas chromatography MDHS 33 Adsorbent tu standards Preparation by the syringe loading technique MDHS 34 Arsine in air Colorimetric field method using silver diethyl-dithiocarbamate in the presence of excess silver nitrate... 

Rezanka, T. (1996). Two-dimensional separation of fatty acids by thin-layer chromatography on urea and silver nitrate silica gel plates. J. Chromatogr. A 727(1), 147-152. 

Tridehydro[18]annulene here and in the sequel refers to the symmetrical isomer shown in the formula, admixed with smaller quantities of an unsymmetrical isomer and tetradehydro[18]annulene.6 These can be separated by chromatography on alumina coated with 20% silver nitrate, but this is unnecessary for the synthesis of [18]annulene sinceallthree substances give this annulene on catalytic hydrogenation.8... 

Injection volumes of 5pl were used for both sample solutions and comparison standards. Qualitative residue confirmation was accomplished with thin layer chromatography using silica gel. Plates were developed with 1% chloroform in n-heptane, and visualized with alkaline silver nitrate spray as the chromogenic agent. Alternatively, p,p5-DDT and p,p5-TDE were confirmed by treatment with 5% methanoic potassium hydroxide [40]. Partial confirmation of Dieldrin was achieved by fractionating the analysis solution on a Mills column, thus isolating Dieldrin in the second fraction [35],... 

McIntyre et al. [58, 59] described a method for the analysis of polychlorobiphenyls and chlorinated insecticides in sewage sludges in which homogenized samples are extracted with hexane, concentrated and cleaned up on an alumina/alumina plus silver nitrate column and eluted with hexane. After concentration of the eluent, polychlorobiphenyl and organochlorine compounds were determined by a silica gel chromatographic procedure and gas chromatography. 

When the reaction has progressed to the desired stage (Note 6), the flow of air is stopped and the mixture is filtered. After the filtrate has been extracted with two 350-ml. portions of petroleum ether (b.p. 30-60°), the combined hydrocarbon extracts are washed successively with two 100-ml. portions of 2N hydrochloric acid and three 100-ml. portions of water. The petroleum ether is distilled from the solution, heated in a water bath, through a 60-cm. Vigreux column, and the residual liquid is distilled under reduced pressure. The fraction, b.p. 64-65° (1.0 mm.) or 132-134° (35 mm.), is collected as 39.5-52.0 g. (64-85%) of colorless liquid, 1.4846-1.4850. This distillation fraction contains (Note 6) 80-90% of the ci5-cyclododecene (51-76%) accompanied by 10-20% of a mixture of cyclododecane and ai,ira s-l,5-cyclododecadiene (Note 7). If desired, the cis-cyclododecene may be further purified by preparative chromatography or separation of the silver nitrate-olefin addition complex (Note 8). 

Elemental composition Ba 65.95%, Cl 34.05%. The metal may be analyzed by various instrumental and wet methods (see Barium). Chloride ion may be determined in an aqueous solution of the salt by ion chromatography or by titrimetry using either silver nitrate titrant and an indicator such as potassi-... 

Elemental composition Be 11.28%, Cl 88.72%. Beryllium may be analyzed in aqueous solution or in solid form by different instrumental techniques (see Beryllium). Chloride may be measured in aqueous solution (after appropriate dilution) by titration with a standard solution of silver nitrate or mercuric nitrate or by ion chromatography or a selective chloride ion electrode. 

Elemental composition Ce 56.85%, Cl 43.15%. In the aqueous phase following acid digestion, cerium may he analyzed by various instrumental techniques (see Cerium). Chloride ion in the solution may be measured by ion chromatography, chloride ion-selective electrode or titration with silver nitrate using potassium chromate indicator. The solution may require appropriate dilution for analysis of both the metal and the chloride anion. 

Elemental composition Co 45.39%, Cl 54.61%. Aqueous solution of the salt or acid extract may be analyzed for cobalt by AA, ICP, or other instrumental techniques following appropriate dilution. Chloride anion in the aqueous solution may be measured by titration with silver nitrate using potassium chromate indicator, or by ion chromatography, or chloride ion-selective electrode. 

Elemental composition Cu 64.18%, Cl 35.82%. Copper(I) chloride is dissolved in nitric acid, diluted appropriately and analyzed for copper by AA or ICP techniques or determined nondestructively by X-ray techniques (see Copper). For chloride analysis, a small amount of powdered material is dissolved in water and the aqueous solution titrated against a standard solution of silver nitrate using potassium chromate indicator. Alternatively, chloride ion in aqueous solution may be analyzed by ion chromatography or chloride ion-selective electrode. Although the compound is only sparingly soluble in water, detection limits in these analyses are in low ppm levels, and, therefore, dissolving 100 mg in a liter of water should be adequate to carry out aU analyses. 

Elemental composition Ph 74.50%, Cl 25.49%. Lead chloride may be identified by its physical properties and using x-ray analysis. An aqueous solution may he analyzed for lead hy AA, ICP and other instrumental techniques, and for chloride ion hy ion chromatography, or hy titration with a standard solution of silver nitrate or mercuric nitrate. 

Elemental composition Li 16.37%, Cl 83.63%. The aqueous solution of the salt may be analyzed for lithium metal by AA or ICP (See Lithium) and for chloride by titration against a standard solution of silver nitrate or mercury nitrate, or by ion chromatography. 

Elemental composition (anhydrous MgCE) Mg 25.54%, Cl 74.46%. Aqueous solution of the salt may he analyzed for Mg hy AA or ICP method (See Magnesium). The chloride ion can he identified hy ion chromatography or measured by titration with a standard solution of silver nitrate using potassium chromate as indicator. 

Elemental composition (for anhydrous NiCb) Ni 45.30%, Cl 54.70% Percent composition of NiCl2 6H20 Ni 24.69%, Cl 29.83%, H2O 45.48%. Nickel may be analyzed in an aqueous solution of salt by various instrumental techniques (See Nickel). Chloride ion in the aqueous solution may be determined by titration with silver nitrate using potassium chromate indicator or preferably by ion-chromatography. The solutions must be appropriately diluted for all analyses. 

Elemental composition P 38.73%, H 1.26%, O 60.01%. The compound may be identified by physical properties alone. It may be distinguished from ortho and pyrophosphates by its reaction with a neutral silver nitrate solution. Metaphosphate forms a white crystalline precipitate with AgNOs, while P04 produces a yellow precipitate and P20 yields a white gelatinous precipitate. Alternatively, metaphosphate solution acidified with acetic acid forms a white precipitate when treated with a solution of albumen. The other two phosphate ions do not respond to this test. A cold dilute aqueous solution may be analyzed for HPO3 by ion chromatography using a styrene divinylbenzene-based low-capacity anion-exchange resin. 

Elemental composition P 37.78%, H 3.69%, 0 58.54%. The acid in solid form may be identified by its physical properties. Aqueous solution may be heated and phosphorus acid is converted to phosphoric acid which is measured for orthophosphate ion by ion chromatography or colorimetry (see Phosphoric Acid). A cold aqueous solution may be analyzed for phosphite ion by ion chromatography, following appropriate dilution. Strength of the acid in an aqueous solution may be measured by acid-base titration using a standard solution of alkali. Also, titration against a standard solution of silver nitrate using potassium chromate as indicator may serve as an additional confirmatory test. 

Elemental composition P 20.20%, O 10.43%, Cl 69.36%. The compound is hydrolyzed in water and the products phosphoric and hydrochloric acids are measured by a colorimetric method for orthophosphate ion (see Phosphoric Acid, Analysis), and titration with silver nitrate for the chloride ion. Also, phosphate and chloride ions can be measured by ion chromatography. 

Elemental composition K 52.44%, Cl 47.56%. An aqueous solution of the salt can be analyzed conveniently for potassium by various wet methods or instrumental techniques (see Potassium). Chloride ion can be determined by ion chromatography or by titration with a standard solution of silver nitrate using potassium chromate indicator. 

Elemental composition (for anhydrous SrCb) Sr 55.27%, Cl 44.73%. The salt is dissolved in water and analyzed for strontium by various instrumental techniques (see Strontium). Chloride ion is measured by ion chromatography or titration with a standard solution of silver nitrate, using potassium chromate indicator. 

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