Phosphorus preparation

The early workers on phosphorus prepared that element from urine which normally contains ammonium and sodium phosphates. Thus, R. Boyle1 evaporated the urine to a syrupy consistency, and distilled the product either alone or admixed with sand or charcoal. The carbon produced by the decomposition of the organic matter in the urine, or added to it in the form of charcoal, decomposes the ammonium phosphate, without affecting the sodium phosphate. A. S. Marggraf mixed the cone, urine with lead chloride and charcoal powder, and heated the mass until it became pulverulent. The ammonium and sodium phosphates were converted into lead phosphate, and on distillation, the carbon liberated the phosphorus from the lead phosphate. G. A. Giobert mixed the unevaporated urine with lead nitrate or acetate washed the precipitated mixture of lead phosphate and sulphate mixed the precipitate with charcoal and distilled the dried product. 

Bruzik, K., Jiang, R. T., and Tsai, M.-D. (1983) Phospholipids chiral at phosphorus. Preparation and spectral properties of chiral thiophospholipids, Biochemistry 22, 2478-2486. 

The red phosphorus prepared by moderate heating may be ground up with a solution of sodium hydroxide as in the technical preparation (see p. 10) and may also be extracted with carbon disulphide until the extract is free from white phosphorus. The resulting preparation is considered to be the purest red phosphorus,4... 

It may also be noted that liquid phosphorus prepared by melting in sealed tubes under high pressures may deposit scarlet crystals. 

Red phosphorus, prepared by digesting 5g of commercial red phosphorus in 50 ml of 5% ammoniacal water on a water bath for 30min. The precipitate is washed with distilled water (Note 2) until the washings are neutral, then with ethanol. Finally, the purified red phosphorus is dried in a forced air oven at 100 °C and stored in a desiccator. 

Matches without Phosphorus. Prepare a paste of 10 parts of dextrine, 75 of pulverized chlorate of potassium, 35 of pulverized plumbic dioxide, ana a like quantity or pulverized pyrites with the necessary quantity of water, and dip the end of the splints into the com-... 

Phosphorus prepared at 580 has a heat of combustion of 50 calories less than that of crystallized red phosphorus. 

Lemoine having worked at 440 with commercial red phosphorus prepared between 250 and 300 , the vapor tension should have, as in Troost and Hautefeuille s experiments, increased rapidly up to the tension of saturated vapor from commercial red phosphorus, then decrease to the tension of saturated vapor of red phosphorus prepared at 440 . 

Preparation of starting materials Alkali metals stripped of crusts under light benzine, then freed of the latter in hi vacuum red phosphorus prepared from freshly distilled, completely dry yellow phosphorus by prolonged heating at 275°C As, sublimed in a nitrogen stream Sb and Bi of highest purity (see also the related sections of this book). 

Elemental phosphorus (prepared from phosphate rock)... 

M. Phosphorus standard solution 1 ml = 2.5 pg phosphorus, prepared by dissolution of 0.2197 g KH2P0 (dried over H2S0 ) with 25 ml sulphuric acid (1+1), and filled up to 1 1. An aliquot of this solution is diluted 20 times. 

The medical man is primarily interested in the therapeutic administration of radioactive substances. Development of the technic is uneven, the furthest being in treatment with radioactive phosphorus prepared by the bombardment of red phosphorus with high speed deuterons. It is too early to judge, but artificial radioactivity is at least as good as x-ray treatment of certain blood diseases, though neither is a cure (90). 

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