When is the process of sublimation useful
Answers
❥Another important use of sublimation is in the frozen food industry. This is called freeze-drying. The frozen water in the material will sublimate from the solid phase to the gas phase when you reduce the surrounding pressure. There is no heat involved in the removal of the water, so this is different from evaporation.
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Explanation:
Sublimation is not a procedure that is generally regarded as an analytical technique. It is a process, however, by which compounds can be purified or mixtures separated and as such can be of value as a single step or as an integral part of a more complex analytical method. It is applicable to a range of solids of inorganic or organic origin in a variety of different matrices and can be particularly useful when heat-labile materials are involved.
As a method of sample purification sublimation has been used to produce high-purity materials as analytical standards. A specific and common example of sublimation used as a means of purification is the removal of water from heat-labile materials in the process known as freeze-drying. The technique is described more fully below.
As a separation technique fractional sublimation has been used either to purify samples for analysis by removing undesirable components of the matrix or to remove the analyte from the matrix for subsequent analysis.