LaClj Lanthanum chloride

LaClj, Lanthanum chloride, 22 39 LaF,aN60,iP,2C72H,2, Lanthanium(IIl), hex-akis(diphenylphosphinic amide)-, tris(hexafluorophosphate), 23 180 Lal2, Lanthanum iodide, 22 36 Lal2, Lanthanum iodide, 22 31 LaNjOijCjHis, Lanthanium(Ul), trini-... 

Releasing agent - dissolve 2.68 g lanthanum chloride heptahydrate (LaClj.ZH O) in water and make up to 100 ml. 

The oxyhydrochlorination catalyst was prepared according to the procedure of Conner et al. [9]. The material was prepared in nonaqueous solvents by successive impregnation of metal chloride salts onto a silica support. A saturated solution of copper (I) chloride in acetonitrile was sorbed into fumed silica (325 mVgram). The acetonitrile was then removed under reduced pressure. A solution of potassium chloride and lanthanum chloride 1n formic acid was added to the cuprous chloride coated silica. The formic acid was removed under reduced pressure to produce the layered oxyhydrochlorination catalyst. The weight composition of the final catalyst was 41.7% CuCI, 37.5% Si02, 11.5% KC1, and 9.4% LaClj. The catalyst could be activated in a stream of hydrogen chloride at 300°C for ten minutes. 

Thus when calcium is to be measured in a matrix rich in phosphate ions or in refractory combinations containing aluminium, then strontium or lanthanum chloride are added. The effect sought is to liberate calcium and to increase the volatility of the medium to ensure a more efficient elimination during the decomposition step. In the same way to measure sodium or potassium it is usual to add a little of Schinkel s solution (CsCI/LaClj). 

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