141. Solving a chemistry problem

Product description

When determining zirconium by the fluorescence of zirconium-morin

complex after fusion of 0.25 g of ore with soda and leaching of the melt

water to the solution was added 6 M HCl and the volume was brought to 25.00 ml. Into dimensional

a flask with a capacity of 25.00 ml, 2.00 ml of the analyzed solution was taken,

added thioglycolic acid to reduce Fe (III),

concentrated HC1, an alcoholic solution of morin and brought with water to

labels. In the same way, a standard solution was prepared with

containing 2 μg of zirconium in 25.00 ml. Measured the intensity

fluorescence of these solutions: 1x1 = 35 and 1d = 70. In the analyzed and

the same weighed amount of EDTA - quencher was dissolved in standard solutions

fluorescence of only the zirconium-morin complex and re-measured

fluorescence intensities of solutions 1x2 = 3.0 and 12 = 4.0. Calculate

mass fraction (%) of zirconium in ore

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