Molybdophosphates ammonium salt

Molybdcnum(V) complexes magnetic behavior, 271 spectra, 251 Molybdoarsenic acid liquid-liquid extraction, 548 Molybdocerophosphoric acid determination, 548 Molybdogermanic acid liquid-liquid extraction, 548 Molybdoniobic acid liquid-liquid extraction, 548 Molybdophosphates ammonium salt in gravimetry, 534 Molybdosilicophosphoric acid liquid-liquid extraction, 548 Mononuclear compounds neutral... [Pg.594]

It is shown that both Sb(III) and Bi(III) can speed reduction of 12-molybdophosphate (12-MPC) to the corresponding heteropoly blue (12-MPB) by ascorbic acid (AA). It is found that mixed polyoxometalates can be formed in solution which reduce considerably more rapidly than 12-MPC. Complete formation of mixed POM is observed only if significant excess of Me(III) ions is used in the reaction. POM responsible for blue color was synthesized by selective extraction. Chemical analysis of tetrabutyl-ammonium salt is in accordance with formula of (TBAl PMeflllfMo O j (Me = Sb, Bi). IR spectmm of mixed POM is identical to 12-MPC. [Pg.156]

Determination of phosphate as ammonium molybdophosphate. This may be readily effected by precipitation with excess of ammonium molybdate in warm nitric acid solution arsenic, vanadium, titanium, zirconium, silica and excessive amounts of ammonium salts interfere. The yellow precipitate obtained may be weighed as either ammonium molybdophosphate, (NH4)3[PMo12O40], after drying at 200-400 °C, or as P205,24Mo03, after heating at 800-825 °C for about 30 minutes. [Pg.485]

Ammonium phosphofluoridate. See Ammonium monofluorophosphate Ammonium phosphomolybdate CAS 54723-94-3 EINECS/ELINCS 234-714-0 Synonyms Ammonium molybdophosphate Ammonium-12-molybdophosphate Molybdophosphoric acid ammonium salt Phosphomolybdic acid, ammonium salt Classiheation Metal-ates Empin cal H12M012N3O40P Formula (NH4)3PMoi2O40 XH2O or (NH4)3P04 I2M0O3 3H2O... [Pg.276]

The application of ammonium molybdophosphate and other unsoluble in water salts of heteropolyacids for preconcentration of heavy metals of first group elements Cs(I), Ag(I), Cu(I) and also T1(I), Hg(I) (M(I)) is described. The shortcomings of ammonium molybdophosphate as ionexchanger are ... [Pg.260]

The yellow precipitate obtained in the ammonium molybdate test for phosphate is (NH4)2H(PMoi204o)H20 (Stockdalc, 1958). When washed with dilute NH4NO3 it becomes (NH4)3(PMoi204q). This molybdophosphate is an example from the series of heteropoly acid salts formed by Mo and W. Some other members are... [Pg.474]

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