Phosphorus dissolved

Both white and red phosphorus dissolve in, for example, concentrated nitric acid to form phosphoricfV) acid, the reaction between hot acid and white phosphorus being particularly violent. 

Electric discharge in a mixture of PC13 and H2 produces P2C14, and white phosphorus dissolved in carbon disulfide reacts with I2 to produce P2I4. All of the trihalides of the group VA elements are known, and they can be prepared by reaction of the elements, although there are other preparative methods. The fluorides are prepared as follows ... 

Figure 5.15. Gas chromatograms of liquid precursors for producing n-type Si films, namely, solution of CPS with white phosphorus dissolved at 1 wt% initial (nonirradiated) solution 20-min-, 25-min-, and 30-min-irradiated solutions and white phosphorus alone solution, for comparison, all of which were diluted with toluene before analysis. Trans-decalin was used as a standard for a quantitative estimation of an unreacted CPS monomer. [Reproduced with permission from Ref. 25. Copyright 2007 The Japan Society of Applied Physics.]...

Calcium phosphate extractant, 500 mg of phosphorus - dissolve 20.3 g calcium phosphate [Ca(H2P04).2H20] in water and make up to 10 I. 

Phosphorus. — Dissolve 10 gm. of soda lime in 100 cc. of nitric acid, and add to the solution 25 cc. of a solution of ammonium molybdate in nitric acid. No yellojv precipitate should form within two to three hours on standing at about 40° C. 

Phosphorus dissolves in arsenic trichloride on warming without reaction and is deposited on cooling.8 If the mixture is heated in the presence of aluminium chloride at 130° to 150° C. for 40 minutes, a brownish-red compound of composition A1As3C13 results,9 from which, however, aluminium chloride can readily be removed by water or ammonia, leaving a residue of finely divided black arsenic. If the compound is heated to 190° C. in the absence of air, it turns black as arsenic trichloride and aluminium chloride distil off and a bright grey mixture of arsenic and arsenide remains. It has been suggested that the arsenic is co-ordinatively bound, and that the compound may be /Ass... 

Darapsky s Incendiary Composition. Intended for loading incendiary projs, it consisted of 3 parts yel phosphorus dissolved in 1-3 part of carbon bisulfide, placed in one compartment and in another compt was placed petroleum. 

W. Hittorf prepared metallic or violet phosphorus by heating phosphorus in contact with lead for 10 hrs. at a temp, near 500°. The phosphorus dissolves in the lead at the high temp., and on cooling separates from the lead in the form of small, dark, reddish-violet, rhombohedral crystals. The crystals can be separated from the lead by treatment with dil. nitric acid, which dissolves only the lead. The crystals are further purified by boiling them with hydrochloric acid. A. Stock and F. Gomolka recommended the following procedure ... 

The four first members of the methane series are gases those containing a greater number of atoms of carbon up to eleven are liquids, and the higher members are solids. The paraffin oil which is burned in lamps consists of a mixture of the liquid members, and paraffin candles largely consist of the solid members. They are all practically insoluble in water. The olefines have similar physical properties, and benzene is a volatile liquid. Iodine, sulphur, and phosphorus dissolve in the liquid hydrocarbons. 

Like its constituent elements, this sulphide of phosphorus dissolves very freely in CS2 (solubility 60 to 100 at ordinary temperatures). It is also moderately soluble in solvents such as benzene and toluene. 

Silver phosphides.—At 400° C. silver and phosphorus-vapour combine to form the diphosphide, AgP2, a grey, crystalline mass.1 White phosphorus dissolves in molten silver, yielding white, crystalline products containing up to 20 per cent, of phosphorus. They are probably solid solutions of silver and phosphorus. Silver phosphide, Ag2P5, is precipitated as a brown, amorphous substance by the interaction of silver nitrate and a solution in liquid ammonia of rubidium phosphide, Rb2P5.2... 

Hobbie J. E. and Likens G. E. (1973) Output of phosphorus, dissolved organic carbon, and fine particulate carbon from Hubbard Brook watersheds. Limnol. Oceanogr. 18, 734-742. 

Phosphorus (dissolved orthophosphate plus dissolved organic phosphorus) Waste waters UV-irradiation for organic phosphorus oxidation to orthophosphate UV—Vis 0.08 mg L 1 Multi-pumping flow system vanadomolybdate method for detecting the orthophosphate [442]... 

Phosphorus (dissolved) Waters, sediment extracts Gel filtration UV-Vis 1.1 (low range) or 12 (high range) pgiu1 Flow injection system speciation Sephadex G-25 mini-column UV-assisted in-line sample preparation two dynamic concentration ranges [546]... 

Half fill a test tube with sweet oil, add a small piece of phosphorus, warm the tube and contents by immersing the tube in hot water for a few minutes. The phosphorus will become dissolved in the oil to a certain extent. The hands, face, or any surface may be rubbed over with the mixture and will present quite a luminous appearance in a dark room. The very small quantity of phosphorus dissolved makes the experiment a perfectly safe one. 

This item consists of white phosphorus dissolved in carbon disulflde. It can bo used to... 

Securely stopper the bottle containing the white phosphorus and carbon disulfide and allow to stand until the white phosphorus dissolves. This usually takes about eight hours. The time required to dissolve white phosphorus can be reduced by shaking the bottle. Be sure that the bottle top does not come off. 

Note, If carbon disulfide is not available, benzene (bensol) may be used to dissolve the phosphorw). It requires considerable shaking and overnight soaking to get an appreciable amount of phosphorus dissolved... 

II. Hlttorf s Phosphorus. Phosphorus dissolved In molten lead separates on cooling as a cryst line form (Hlttorf s phosphorus). This material can be readily prepared via the Stock and Gomolka procedure, as Improved by Pakulla. 

Kerouel, R. and Aminot, A. (1995) Model compounds for the determination of organic and total phosphorus dissolved in natural waters. Analytica Chimica Acta 318, 385-390. 

Hilger, S., Sigg, L. and Barbieri, A. (1999) Size fractionation of phosphorus (dissolved, colloidal and particulate) in two tributaries to Lake Lugano. Aquatic Sciences 61,337-353. 

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