361. A portion (a) of the test sample, after appropriate treatment, was dissolved in a volumetric flask (V). Its optical density (Dx) was measured. To construct a calibration graph, a series of standard solutions was prepared and their relative optical densities were measured. Using the data in Table 13, build a calibration graph in the coordinates DOTH-C and determine the concentration of the analyte in the specified units.
Table 14
Task No. Test sample Standard solution
ion Reaction images. dyed. connected Sample, g Volume, cm3 Optical density Dx What is determined, ω,% Solution number Concentration, mg Rel. optical density DST
1 2 3 4 5 6 7 8 9 10
361 Zr2+ With zirconyl 0.8000 50.00 0.32 Zr in steel I
II 1.2
1.5 0.28
0.35
362 Zr2+ With zirconyl 0.1092 50.00 0.44 Zr in steel III 1.7 0.40
363 Zr2+ With zirconyl 0.0984 50.00 0.38 Zr in steel IV 2 0.47

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