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Vacuum distillation - Wikipedia

Vacuum distillation is distillation performed under reduced pressure, which allows the purification of compounds not readily distilled at ambient pressures or simply to save time or energy. This technique separates compounds based on differences in boiling points. This technique is used when the boiling point of the desired compound is difficult to achieve or will cause the compound to decompose.

Removing Solvent by Rotary Evaporation

03.11.2017 · Dr Stephen Flower from the Department of Chemistry demonstrates removing solvent by rotary evaporation

Rotary evaporator - Wikipedia

A rotary evaporator (or rotavap /rotovap) is a device used in chemical laboratories for the efficient and gentle removal of solvents from samples by evaporation.When referenced in the chemistry research literature, description of the use of this technique and equipment may include the phrase "rotary evaporator", though use is often rather signaled by other language (e.g., "the sample was .

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Role of Concrete Curing

Immersion is mainly used in the laboratory for curing concrete test specimens. Spraying and fogging Spraying and fogging are used when the ambient temperatures are well above freezing and the humidity is low. Fogging can minimize plastic shrinkage cracking until the concrete attains final set. Saturated wet coverings Wet coverings saturated with water should be used after concrete has hardened .

Distillation - Wired Chemist

Figure 1. Distillation apparatus. A distillation flask with a thermometer is placed in a heating mantle and is connected to a condenser. Figure 2. The tubes on the condenser are attached to a water source, with the water flowing in the low end and flowing out the high end of the condenser. The condensed vapor drips into the collection receiver. Basic Procedure. Check the calibration of the .

Chemistry for Kids: Chemistry Lab Equipment

It is used in the chemistry lab for mixing, heating, and stirring liquids. Beakers come in various sizes and are shaped like a cylinder. Beakers. Bunsen burner - The Bunsen burner is a metal tube that produces a flame from gas such as methane, propane, or butane. It is used in the lab for heating and sterilizing. The Bunsen burner is named after German chemist Robert Bunsen. Bunsen burner .

Chemical Engineering Resources - Cheresources.com - Index

Heat tracing is used to prevent heat loss from process fluids being transported in process fluid pipes, when there is risk of damage to piping, or interference with operation such as fouling or blockage, caused by the congealing, increase in viscosity, or separation of components, in the fluid below certain temperatures, or when there is risk of formation of corrosive substances or water due .

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How to Perform a Recrystallization - ThoughtCo

16.08.2019 · Recrystallization is a laboratory technique used to purify solids based on their different solubilities. A small amount of solvent is added to a flask containing an impure solid. The contents of the flask are heated until the solid dissolves. Next, the solution is cooled. The more pure solid precipitates, leaving impurities dissolved in the solvent. Vacuum filtration is used to isolate the .

How Does Mass Spectroscopy Work? - Bitesize Bio

16.02.2011 · Study the protein content of a sample of cells; How Does Mass Spec Work? There are three key stages to the spectrometer: 1. Ionization. Molecules in a sample are vaporized (converted to the gas phase by heating). Then, an electron beam bombards the vapors, which converts the vapors to ions. Because mass spectroscopy measures the mass of charged particles, only ions will be detected, and .

Chemistry for Kids: Chemistry Lab Equipment

It is used in the chemistry lab for mixing, heating, and stirring liquids. Beakers come in various sizes and are shaped like a cylinder. Beakers. Bunsen burner - The Bunsen burner is a metal tube that produces a flame from gas such as methane, propane, or butane. It is used in the lab for heating and sterilizing. The Bunsen burner is named after German chemist Robert Bunsen. Bunsen burner .

5.5B: Step-by-Step Procedures for Rotary Evaporation .

20.11.2017 · Rotary Evaporation Procedure Figure 5.67: a) Sample to be evaporated, b) Attachment of sample to bump trap on rotary evaporator, c) Lowering of sample into water bath. If your institution uses a water circulator connected to the condenser to minimize water usage (open cabinet of Figure 5.65), be sure that there is ice in the water reservoir.

lab use rotary evaporator

Rotary Evaporation - Chemistry LibreTexts. Rotary evaporation is the process of reducing the volume of a solvent by distributing it as a thin film across the interior of a vessel at elevated temperature and reduced pressure. This promotes the rapid removal of excess solvent from less volatile samples. Most rotary evaporators have four major .

How to Desalinate Water: 9 Steps (with Pictures) - wikiHow

30.06.2020 · You will use the ceramic mug as a container for the desalinated water and the large glass bowl will act as a receptacle for the salt during the desalination process. The glass bowl should be big enough to fit the mug. You will also need a piece of plastic cling wrap, enough to go over the glass bowl, and a small weight like a rock.

Filtration | chemistry | Britannica

Filtration, the process in which solid particles in a liquid or gaseous fluid are removed by the use of a filter medium that permits the fluid to pass through but retains the solid particles. Either the clarified fluid or the solid particles removed from the fluid may be the desired product. In some processes used in the production of chemicals, both the fluid filtrate and the solid filter .

Fast Ways to Make Water Evaporate | Sciencing

29.04.2018 · The process by which water transforms from liquid to gas is called evaporation. Evaporation occurs when heat is applied, and it occurs especially fast once water reaches 212 degrees Fahrenheit. This temperature is known as the "boiling point". It stands to reason, then, that if you're trying to make water evaporate, it is necessary to apply heat. But some heat-application methods will cause .

Properties of Solvents Chart | Sigma-Aldrich

Solvent Property Chart. The solvent property chart a lists the physical properties of solvents like Acetone, Benzene and Acetic Acid in alphabetical order for easier referencing. Use the solvent chart in the lab to find common solvent properties like boiling point, melting point, specific gravity and refractive index faster.

How to Perform a Recrystallization - ThoughtCo

16.08.2019 · Recrystallization is a laboratory technique used to purify solids based on their different solubilities. A small amount of solvent is added to a flask containing an impure solid. The contents of the flask are heated until the solid dissolves. Next, the solution is cooled. The more pure solid precipitates, leaving impurities dissolved in the solvent. Vacuum filtration is used to isolate the .

SECTION 5 Methods of sampling and analysis

procedures Analysis Laboratory methods developed and validated using scientifically recognized principles and procedures should be used.15 When selecting methods, consideration should also be given to practicability, with preference given to those methods which are reliable and applicable for routine use. Laboratories conducting routine analyses of feed and feed ingredients should ensure their .

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Vacuum distillation - Wikipedia

Vacuum distillation is distillation performed under reduced pressure, which allows the purification of compounds not readily distilled at ambient pressures or simply to save time or energy. This technique separates compounds based on differences in boiling points. This technique is used when the boiling point of the desired compound is difficult to achieve or will cause the compound to decompose.

What is the purpose of using the rotary evaporator? - Lab .

A rotary evaporator (or rotavap/rotovap) is a device used in chemical laboratories for the efficient and gentle removal of solvents from samples by evaporation.. The purpose of distillation is to separate a given mixture into its components based on their respective volatilities, through the process of evaporation and condensation (liquid-gas-liquid).

SECTION 5 Methods of sampling and analysis

procedures Analysis Laboratory methods developed and validated using scientifically recognized principles and procedures should be used.15 When selecting methods, consideration should also be given to practicability, with preference given to those methods which are reliable and applicable for routine use. Laboratories conducting routine analyses of feed and feed ingredients should ensure their .

Lab Manager | Run Your Lab Like a Business | Lab Manager

Lab Manager features articles relating to management, technology, and equipment common to laboratories in industry, medicine, universities, and biotechnology

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