Uranyl thiosulphate

Uranyl Thiosulphate, UO2S2O3, appears as a yellow precipitate when sodium thiosulphate is added to a solution of a soluble uranyl salt. ... 

After taking the sample, the reaction was immediately stopped with 0.1 mL of 0.1 N sodium thiosulphate solution. Copper grids were exposed to 20-p, L samples for 15 min and washed with sterile distilled water. Finally grids were stained in 2% aqueous uranyle acetate for 8 min and dried. The grids were examined with a Zeiss EM 902 transmission electron microscope (LEO Elektronenmikroskopie GmbH). 

Weigh out 2 g of your preparation and dissolve in 10 cm saturated KI solution. Irradiate using a low pressure mercury lamp for 3 hours. Transfer quantitatively to a cmiical flask and titrate the liberated iodine with freshly prepared standardised 0.002 M sodium thiosulphate. Carry out a blank experiment. To measure the quantum yield, irradiate a uranyl oxalate solution under identical conditions for 10 minutes. (Sec.2.10.2). Record the reflectance spectra of the original product before irradiation and a portion of die irradiated product after washing and drying. 

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