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How to use a Rotary Evaporator - UCLA Chemistry and .

3. A metal or Keck clip is used to secure the flask and the bump trap. The green one shown below fits 24/40 ground glass joints. Similar blue clips fit 19/22 joints and the yellow ones fit 14/20 joints, which will most likely used in the lab.

Rotavap problems : chemistry - reddit

Is the cooling system of the rotovap connected?. This sounds a lot like it is not. Check for proper water flow to the rotovap reflux cooler. Second: turn the water bath to 40°C and put in a bottle of diethylether. Gradually lower the vacuum to 800 mbar. Ether should be properly boiling and condensing, collecting in the rotovap collection flask.

Rotary evaporator - Wikipedia

2. Next, cold water is circulated through the rotovap condenser to condense the volatile solvent on the condenser coils and to prevent, as much as possible, the volatile solvent from vaporizing into the aspirator. Ice and a small amount of water are placed in the water-circulating pump. The circulating pump is .

Any Rotovap Tips? : chemistry

the reason you spin on a rotovap is to increase the surface area exposed when evaporating, and disrupt the surface such that it doesn't bump. I rotovap at a speed fast enough to ensure the liquid in the flask is swirling, and that an even thin layer is exposed to the vacuum on each rotation. this varies based on flask size, and liquid viscosity. and in later stages how much compound I expect .

How Not To Do It: Water Aspirators | In the Pipeline

Aug 25, 2008 · Water aspirators combined with rotovaps (Rotovap or Rotavap? Google decides: Rotovap: 24500 hits, Rotavap: 13400 hits.) on the open benchtop combined with a heavy flask containing way too much ethyl bromoacetate (Caution: Lachryamtor!) led me to have a first hand teargas experience one morning. Used to have to allow hours to remove ethanol.

Rotary Evaporation to Remove Solvent | Protocol

Rotary evaporation is a technique commonly used in organic chemistry to remove a volatile solvent from a non-volatile compound of interest. Invented by Lyman C. Craig in 1950 the rotary evaporator, or rotovap, gently removes solvents from compounds using heat combined with reduced pressure to evaporate, dry, and purify samples for further downstream use.

Standard Operating Procedure: Rotovaps - Chemistry

Before using the rotovap, operator should be familiar with the various rotovap components and definitions. First take your sample solution (in round bottom flask—volume half full) to the rotovap you wish to use. A bump trap (located in the drawer next to the rotovap hood) should be placed between the

Chemistry in Pictures: Sun-kissed rotovaps

Chemistry matters. Join us to get the news you need. . "We run most of our reactions in solvent and consequently have to use the rotovap to get solvent out of all reaction mixtures prior to .


When it comes to the laboratory work, one of the most useful equipment that requires a mention is the rotary evaporator. Under vacuum conditions, constant temperature heating brings about evaporation of the material which forms a large-area film on the bottle wall following certain steps.

Rotary Evaporation - Chemistry LibreTexts

Fire up your rotovap with the vacuum open and slowly open the stopcock to allow it to pull solution from your Erlenmeyer into your bump trap. Do not let solvent accumulate in the evaporation flask faster than it is evaporating! That's a good way to fill up your evaporating flask all .

Solved: For What Purpose Is A Rotary Evaporator (a.k.a. "r .

For what purpose is a rotary evaporator (a.k.a. "rotovap") typically employed in the chemistry laboratory? Briefly explain how a rotovap works. Expert Answer (1 rating) Previous question Next question Get more help from Chegg. Get 1:1 help now from expert Chemistry tutors .

Rotovap - Dartmouth College

The rotovap is designed to be operated under a vacuum (to lower a compound's boiling point) while heating the sample at the same time. A cold finger is used to condense the vapors to a liquid, which are trapped in a separate flask. Below is a photograph of a rotary evaporator. .


is standard equipment in a modern chemistry laboratory. The rotovap works by increasing the rate of evaporation of the solvent by (1) reducing the pressure to lower the solvent boiling point, (2) rotating the sample to increase the effective surface area and (3) heating the solution. To use the rotovap, first make sure that the power is

Chemjobber: C&EN: Medicinal chemist selling rotovap .

TOWARDS A QUANTITATIVE UNDERSTANDING OF THE QUALITY OF THE CHEMISTRY JOB MARKET. Friday, February 5, 2016. C&EN: Medicinal chemist selling rotovap chilling device Credit: C&EN/George Adjabeng: Also in this week's C&EN, a really great little story about a chemist who is selling a rotovap

What is bumping in a Rotovap? - Lab Instrument Manufacturer

Home / Product knowledge / What is bumping in a Rotovap? View Larger Image Bumping is a phenomenon in chemistry where homogenous liquids boiled in a test tube or other container will superheat and, upon nucleation, rapid boiling will expel the liquid from the container.

analytical chemistry - Does a rotary evaporator need a .

Chemistry Stack Exchange is a question and answer site for scientists, academics, teachers, and students in the field of chemistry. It only takes a minute to sign up. . The water is contained and so can be disposed of properly. I have one, and it gets down to 25 Torr, plenty for a rotovap.

Rotary Evaporation - Oregon State University

Rotary Evaporators. Removal of solvents by simple distillation is a tedious procedure, complicated by setup and cleaning of the apparatus. A major advance in efficiency is achieved by using a rotary evaporator ("rotovap").

Shop Rotary Evaporators & Rotovaps [Price Matched]

What are rotary evaporators? A rotary evaporator (or rotavap or rotovap) uses precise engineering to effectively remove solvents from a sample using evaporation. Most rotovaps make use of a vacuum and pressure control monitor to precisely control pressure within your system, increasing evaporation efficiency.. In many commercial labs, these machines need to be running around-the-clock without .

experimental chemistry - How to prevent losing solvent .

A rotovap typically uses a cold condenser to condense the solvent into a collection flask. But the distillation is typically done under weak vacuum as well. So the solvent sitting in the collection flask seem susceptible to re-vaporizing and getting sucked into the vacuum pump.

Title: Rotary Evaporator Page 1 of 6 ROTARY EVAPORATOR

• To quickly shut down rotovap: turn off pump, vent to airand turn off all power switches. • Consult MSDS forsf for proper course of action in the case of chemical exposure. • In the case of fire: evacuate lab, pull alarm, and call 911 (the rotovap is not contained in a fume hood so .

Selecting a Suitable Chiller for Your Rotary Evaporator .

A chiller is an important part of many rotovap setups as it's responsible for cooling the coolant that flows through the condenser. It's possible to avoid purchasing a chiller, for example by using a dry ice condenser or juryrigging your own chiller, but in most cases, a suitable chiller will be needed.. When shopping for an appropriate chiller for your setup, the most important factors to .

49 questions with answers in ROTARY EVAPORATION | Science .

Jun 18, 2020 · Science topics: Chemistry Rotary Evaporation. . I see, so it might be possible with a better vacuum source! we have a good oil vacuum pump which i can connect to the rotovap.

Rotary Evaporation - Oregon State University

Rotary Evaporators. Removal of solvents by simple distillation is a tedious procedure, complicated by setup and cleaning of the apparatus. A major advance in efficiency is achieved by using a rotary evaporator ("rotovap").

Homemade Rotovap | Hackaday.io

A Rotovap is extremely useful to have for chemistry but is usually prohibitively expensive for most people to buy (~ 500 used and > 2000 new). This project outlines how to create your own rotovap assuming you have a vacuum supply, wood working tools, and a 3D printer (or just buy printed parts off of a printing service) for less than 100 USD .

Rotary Evaporator Flasks | VWR

In order to process your orders without delay, we request that you provide the required business documentation to purchase this product. To order chemicals, medical devices, or other restricted products please provide identification that includes your business name and shipping address via email [email protected] or fax 484.881.5997 referencing your VWR account number .

Mini-rotovap – Martin Chin

Mar 06, 2020 · I was able to scrounge up this old unused rotovap. Jim Hodgson at Kansas State University made the short top of the rotovap. Thorlabs has a nice little clamp that rotates, so I could position the rotovap at any angle. I wanted a more vertical configuration to save on space. The travel hairdryer was courtesy of Amazon Prime.

Episode 3: Rotovap Mishap | MIT OpenCourseWare | Free .

ANNOUNCER: Now it's time to head over to the rotovap to evaporate the ether. Anthony starts rotovapping, and it's all going well, for now. But after a while--ANTHONY: I'm not getting any of my dried sample on the edges. I think as long as there is still ether in there, then I won't get anything to show up, is what I'm hoping. IKE: His was a lot .

How Does the Rotary Evaporator Work? – Extraction Magazine

Dec 18, 2018 · A rotary evaporator, or "rotovap" in lab jargon, is an instrument used in a chemistry lab to remove a volatile solvent from a liquid mixture. In a cannabis setting, the most common use for it is to remove ethanol from a winterized extract.

Rotovap | Is a registered Trademark 2017 | United States

Rotovap registered trade mark lab science plant oil extraction Rotovapur is a unique company we design and invent new lab technology and rotary evaporator machines glassware lab apparatus for plant science extractions based on 30 years working in Terpenes and alkoloids. Shop & Purchase rotovap. HOME. PRIVACY POLICY. SERVICES.

Rotary Evaporators | System | Laboratory

Richmond Sarpong, Ph.D. Professor of Chemistry, UC Berkeley "Replacing our dry ice/isopropanol condenser for the EcoChyll has made rotovapping much more convenient — we can leave the rotovap without having to worry about the condenser warming up." .