The spectrometric measurement of calibration solution and unknown should be measured at the same time. Give...

The spectrometric measurement of calibration solution and unknown should be measured at the same time. Give reason(s) for this?

Expert Solution

Any impurities present in solvent [which is chosen to dissolve the unknown] can be substracted from blank and if we allow the some time gap between two measurements then extended time solution will lose solvent by a process called evaporation (if solvent has low boiling point near to room temperature or below), this effects its concentration of the unknown solution causing large errors during acquisition of spectrum.

All measurements must be peformed under same temperature, same concentration and same pressure. (i.e at room temperature).

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queen_honey_blossom answered 2 years ago

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