Dissolve 70 g of sodium molybdate (Na2MoO42H2O) in 150 ml water (Slution A). Dissolve 60 g of acetic acid in a mixture of 85 ml nitric acid and 150 ml of water and cool (Solution B) Gradually add Solution A to Solution B, with stirring, to produce Solution C. Dissolve 5 g of synthetic quinoline in a mixture of 35 ml nitric acid and 100 ml water (Solution D) Gradually add Solution D to Solution C, mix well, and allow to stand overnight. Filter the mixture, add 280 ml of acetone to the filtrate, dilute to 1 liter with water, and mix. Store in polythene bottle.(Caution: Flammable).