Double Distilled Water
Double Distilled Water - Related Videos
06:49
Simple Distillation - Student Protocol
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2020
Source: Lara Al Hariri and Ahmed Basabrain at the University of Massachusetts Amherst, MA, USA Simple DistillationExpand In this lab, you will use simple distillation to separate a mixture of cyclohexane and toluene. Before you start the lab, put on the appropriate personal protective equipment, including a lab coat, safety goggles, and gloves. This experiment must be conducted in a hood. Assemble the distillation apparatus. Refer to the example set up that has been prepared...
02:59
Simple Distillation - Instructor Prep
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2020
Source: Lara Al Hariri at the University of Massachusetts Amherst, MA, USA Preparation of the LaboratoryExpand Here, we show the laboratory preparation for 10 students working in pairs, with some excess. Please adjust quantities as needed. Before you begin, put on a lab coat, splash-proof safety glasses, and nitrile gloves. Set out the following glassware and equipment that the students will need to build the distillation apparatus (we suggest that students work in pairs):
03:13
Simple Distillation - Concepts
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2020
Distillation of a Miscible Mixture Some liquids will evaporate entirely over time if left in an open container at room temperature. However, this evaporation process can be significantly accelerated if the liquid is heated. As the liquid is heated, the molecules within it gain the energy to escape the liquid phase and transition into the gas phase in the form of bubbles. This phenomenon is called boiling. Vapor Pressure Consider a closed container of liquid. Initially, some of this liquid...
10:58
Steam Distillation - Student Protocol
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2020
Source: Lara Al Hariri and Ahmed Basabrain at the University of Massachusetts Amherst, MA, USA Steam DistillationExpand In this experiment, you will perform a steam distillation to extract an essential oil from an orange peel. Before you start the lab, put on the appropriate personal protective equipment, including a lab coat, safety goggles, and gloves. This experiment must be performed in a hood. First, you will need to assemble the steam distillation apparatus. Check the...
10:09
Fractional Distillation
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2023
Source: Laboratory of Dr. Nicholas Leadbeater — University of Connecticut Distillation is perhaps the most common laboratory technique employed by chemists for the purification of organic liquids. Compounds in a mixture with different boiling points separate into individual components when the mixture is carefully distilled. The two main types of distillation are "simple distillation" and "fractional distillation", and both are widely used in organic chemistry laboratories. Simple distillation...
FAQs
The second distillation subjects the water to another vaporization and condensation cycle. During each cycle, many dissolved salts, organic compounds, and other nonvolatile residues remain in the boiling flask rather than entering the condensed water. Repeating the process therefore further reduces chemical contaminants, which can help limit unwanted effects in sensitive immunology, infection, and analytical procedures.
Distillation is particularly useful for reducing dissolved salts, organic compounds, and other nonvolatile contaminants because these substances tend to remain behind during boiling while water vapor condenses separately. The method therefore targets chemical residues that could alter prepared solutions. Its effectiveness should be understood as improved chemical purity, not as a guarantee that every contaminant or biological agent is absent.
No. Double distilled water improves chemical purity, but the purification described does not by itself establish biological sterility. When an experiment requires sterile water, researchers may need additional sterilization or specialized treatment. This distinction is important for culture reagents and cell-based assays, where biological contamination could affect the intended experimental outcome independently of dissolved chemical impurities.
It can serve as the purified water component when preparing buffers, culture reagents, stains, and analytical solutions. The selected solution is then prepared according to the relevant experimental protocol, with additional treatment considered when sterility is essential. Using water with fewer residual ions and compounds helps reduce variation attributable to the water itself across repeated laboratory preparations.
Buffers and stains can be sensitive to unwanted chemical residues in their ingredients. Double distilled water reduces dissolved salts, organic compounds, and other nonvolatile contaminants that might influence reactions or staining behavior. In immunology work, this supports more consistent preparation of assay solutions and helps researchers distinguish experimental effects from variation introduced by impurities in the water.
In infection research, it can be used to prepare culture reagents and analytical solutions involved in microbial measurements. Lower levels of residual chemical contaminants may help prevent the water from contributing unintended variation to those measurements. However, if the application requires biological sterility, researchers must add suitable sterilization or specialized treatment rather than relying on distillation alone.