ammonium molybdate


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ammonium molybdate

[ə′mōn·yəm mə′lib‚dāt]
(inorganic chemistry)
(NH4)2MoO4 White, crystalline salt used as an analytic reagent, as a precipitant of phosphoric acid, and in pigments.
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Reagents: 4 % ammonium molybdate solution and 0,03 % hydrogen peroxide solution.
The color was developed with molybdate reaction which was as follows: The 500 L mixture (composed of 200 L of 2 % ammonium molybdate and 300 L of 14 % ascorbic acid in 50 % trichloroacetic acid) was added to the above mixture (700 L) followed by the addition of 1 mL solution containing 2 % trisodium citrate and 2 % sodium arsinate in 2 % acetic acid to make the total volume of 2200 L.
The second solution of lower reactant was prepared by adding ammonium molybdate and ammonium nitrate each weighing 817 mg to 80 mL of distilled water.
Plasma phosphorus is quantified through reaction with ammonium molybdate to form a colored phosphomolybdate complex (3).
The released inorganic phosphates were measured by a modified method of Heinonen and Lahti (1981) with a freshly prepared acetone ammonium molybdate (AAM) reagent consisting of acetone, 5N sulfuric acid, and 10 mM ammonium molybdate (2:1:1, v/v).
8 ml of color reagent (25 ml ammonium molybdate solution [10 gm ammonium molybdate.
g] values, observed in previous work when ammonium molybdate incorporated in epoxy-silica hybrid formulations cured at high temperatures (13), can be reproduced in cold-curing systems.
Soluble phosphate was extracted with distilled water and reacted with ammonium molybdate and stannous chloride to form the brightly blue-colored heteropoly-molybdenum blue which was analyzed spectrophotometrically at 650 nm.
The key ingredients for phthalocyanine pigments are copper, aluminum, urea, chlorine, ammonium molybdate and phthalic anhydride.
The colour reagent was prepared just prior to each analysis and consisted of a solution of (g/L): ammonium molybdate (40), potassium antimony tartrate (0.
B) Chemicals : 1) Conc Hydrochloric acid (Merck) 2) Conc Sulphuric acid (Merck) 3) Conc Nitric acid (Merck) 4) Orthophosphoric acid 5) Ethanol 6) Methanol 7) Copper nitrate 8) Ammonium molybdate 9) Ammonium chloride 10) Ammonium ferrous sulphate 11) Copper Sulphate 12) Cadmium nitrate 13) Sodium carbonate 14) Sodium nitrite 15) Potassium ferrocyanide 16) Potassium iodide (Merck)