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Operation of the Rotary Evaporator (Rotovap)

Operation of the Rotary Evaporator (Rotovap)

3. To close the system and thus activate the vacuum, turn the stopcock knob at the far end of the rotovap to align it with the vacuum (ie. turn until the arrow on the knob points straight down towards the attached tubing ie. knob is pointing to the “ON” position). The system is now under reduced pressure. 4.

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[Toxicology of acetonitrile] - PubMed

[Toxicology of acetonitrile] - PubMed

Abstract. Acetonitrile is a high-polarity organic solvent widely used in various chemical industries and laboratories. It was once used in consumer goods such as cosmetics. Acetonitrile is readily absorbed through the skin, by inhalation and by ingestion, and acute poisoning and even fatal effects are possible via these routes.

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Buchi R-200/R-210 Rotavapor - University of York

Buchi R-200/R-210 Rotavapor - University of York

Acetonitrile 82 35 Chloroform 61.2 30 Cyclohexane 80.74 30 Dichloromethane 39.6 25 Ethanol 78 35 Ether 34.6 20 Ethyl Acetate 77.1 35 Methanol 64.7 30 Pet Ether 40-60 40-60 20 Pet Ether 60-80 60-80 25 Toluene 110.6 45 Water 100 45 Coil condenser Air bleed tap Flask clip Angle adjuster Rotation control Water in/out

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Solvent Recycling and Azeotropes

Solvent Recycling and Azeotropes

Another common binary azeotrope found in solvent recycling is acetonitrile and water. This is a common mixture used for HPLC analysis. Acetonitrile boils at 81.6 C and water boils at 100 C. The mixture forms an azeotrope which boils at 76.1 C and which is composed of 86% acetonitrile and 14% water. There are also azeotropes between three ...

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How to Select a Vacuum Pump for Rotary Evaporation?

How to Select a Vacuum Pump for Rotary Evaporation?

Applying vacuum using a pump is either helpful or necessary in most rotovap applications as it reduces the pressure within the system. This lowers the boiling temperature of the solvent resulting in faster evaporation and safer rotary evaporator operation. When composing a rotary evaporator setup, not just any pump will be up to the task.

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How to use a Rotary Evaporator

How to use a Rotary Evaporator

Apr 01, 2010 The flask with the solution is placed on the rotary evaporator. The use of a bump trap prevents the solution from accidentally splashing into the condenser (and being …

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Acetonitrile Rotovap Conditions

Acetonitrile Rotovap Conditions

Dec 14, 2021 Acetonitrile is a common o rganic solvent. In reversed-phase liquid chromatography analysis, acetonitrile-water acts similarly to methanol-water and is often used as the mobile phase. Obviously, acetonitrile is a polar solvent similar to methanol. It is generally believed that acetonitrile is miscible with water under any conditions.

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Yes. Increasing LC-MS Sensitivity can be that Simple.

Yes. Increasing LC-MS Sensitivity can be that Simple.

Dec 22, 2017 Do not use acetonitrile, because acetonitrile can polymerise and block system valves. Conclusion. Mass spectrometry is a powerful technique for identification and quantification of molecules within complex mixtures. The success of mass spectrometry strongly depends on reducing contamination throughout the entire sample handling process: from ...

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Buchi 20/40/60 rule for Rotary Evaporators

Buchi 20/40/60 rule for Rotary Evaporators

Doc: CHEMFS rotovap pressure-temp Custodian: Dept. Chem. School Safety Coordinator Page 1 of 1 Created: Feb 2005 Last Review : Dec 2010 Next Review: Dec 2013 ... Acetonitrile n …

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Which Rotovap Acetonitrile

Which Rotovap Acetonitrile

Evaporate the dichloromethane using a rotovap. Dissolve the resulting dark blue solid in 6N hydrochloric acid (10mL) and stir at room temperature for 45min. Filter the reaction mixture and dry the filtrate by rotovap. Dissolve the resulting residue in 8mL of HPLC solvent (50% acetonitrile in water with 0.1% trifluoroacetic acid). Get Details

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Acetonitrile for HPLC gradient grade = 99.9 75-05-8

Acetonitrile for HPLC gradient grade = 99.9 75-05-8

General description. Acetonitrile (MeCN) is widely employed as a solvent in various studies and has high dielectric constant (37.5). Various purification procedures to obtain different grades of acetonitrile for use in different studies (polarography, spectroscopy, etc.) have been reported by many researchers.

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Acetonitrile anhydrous 99.8 75-05-8

Acetonitrile anhydrous 99.8 75-05-8

General description. Acetonitrile, an aliphatic nitrile, is widely used as an organic solvent and intermediate in organic syntheses. It is transparent to UV-visible light, which makes it highly applicable in spectrophotometric and fluorimetric techniques. MeCN is utilized as a mobile phase component in many chromatographic techniques, due to ...

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Acetonitrile CH3CN - PubChem

Acetonitrile CH3CN - PubChem

It has a role as a polar aprotic solvent and an EC 3.5.1.4 (amidase) inhibitor. It is an aliphatic nitrile and a volatile organic compound. Acetonitrile has many uses, including as a solvent, for spinning fibers, and in lithium batteries. It is primarily found in air from automobile exhaust and manufacturing facilities.

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Rotovap Distillation: What Is A Rotary Evaporator? BVV

Rotovap Distillation: What Is A Rotary Evaporator? BVV

Jul 21, 2017 The rotovap size depends on how many liters you need to recover. That being said, the most common sizes are 5L, 10L, 20L, and 50L. The size refers to the size of the evaporating flask. It’s important to note that the flask is not loaded at max capacity during operation, but usually around 20-40% capacity. ...

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Azeotropes in Rotary Evaporation Blog

Azeotropes in Rotary Evaporation Blog

Jun 21, 2021 Azeotropes are mixtures of two or more liquids whose ratios cannot be changed through simple distillation. When an azeotropic mixture is boiled, the resulting vapor has the same composition as the unboiled liquid mixture. Azeotropes are often referred to as constant boiling point mixtures. When using a rotary evaporator, it’s important to be ...

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Acetonitrile CH3CN - PubChem

Acetonitrile CH3CN - PubChem

Like hydrogen cyanide (HCN), acetonitrile (ACN) is readily absorbed from the lungs and gastrointestinal tract, and is distributed throughout the body in both humans and laboratory animals. In a group of male and female test subjects, 74% of inhaled ACN was absorbed when cigarette smoke was held in the mouth for 2 seconds (and not inhaled), and 91% was …

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Putting the Rule of 20 Into Practice Blog

Putting the Rule of 20 Into Practice Blog

May 08, 2020 In general, your bath temperature should be 20C higher than the boiling point of the substance you want to evaporate. And your coolant should be 20C or more lower than the …

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10 liter rotovap acetonitrile

10 liter rotovap acetonitrile

May 10, 2021 Fractions with pheromone activity were pooled concentrated (rotovap concentrator) loaded onto an HPLC C-18 column in 20 acetonitrile 0.1 trifluoroacetic acid and eluted with a gradient that increased acetonitrile concentration 0.4 per min over the region of interest (35 -60 acetonitrile). Get Price

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Ptfe Sealing 3L Vacuum Rotary Evaporator Rotovap

Ptfe Sealing 3L Vacuum Rotary Evaporator Rotovap

PTFE Sealing 3L Vacuum Rotary Evaporator Rotovap in Guancheng. Ptfe Sealing 3L Vacuum Rotary Evaporator Rotovap. 500.00 - 1000.00 USD. Get Latest Price. Minimum Order …

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Rotovap - Lab Instrument Manufacturer

Rotovap - Lab Instrument Manufacturer

Rotovap is a device for quickly concentrating liquid samples. The liquid sample is heated and decompressed in a spherical glass container, and continuously rotated to increase the evaporation surface area and accelerate the evaporation rate. Rotating evaporators are often used with water circulation vacuum pump.

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The Rotovap: Why Bartenders Love It -

The Rotovap: Why Bartenders Love It -

Sep 17, 2020 The rotovap has a large number of applications in cocktails, but essentially it’s used either to add flavor or to remove undesirable characteristics of an ingredient. “This machine is excellent at capturing and preserving the aroma of spices, herbs and other ingredients but really specifically with the fresh herbs,” says Arnold.

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Solvent Boiling Points Chart - BrandTech Scientific Inc.

Solvent Boiling Points Chart - BrandTech Scientific Inc.

Solvent Boiling Points Chart (all boiling points at standard pressure) Solvent Boiling Point (C) Solvent Boiling Point (C) Acetic Acid 118.0 Ethyl Acetate 77.1 Acetic Acid Anhydride 139.0 Ethyl Ether 34.6 Acetone 56.3 Ethylene Dichloride 83.5 Acetonitrile 81.6 Ethylene Glycol 197.5 Benzene 80.1 Heptane 98.4 iso-Butanol 107.7 n-Hexane 68.7 n-Butanol 117.7 Hydrochloric …

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Solvent Removal - Organic Chemistry at CU Boulder

Solvent Removal - Organic Chemistry at CU Boulder

The motor in the rotovap turns the flask rapidly, providing a greater surface from which evaporation can occur and speeding up the process. Cooling coils in the rotovap condense the vapors and drop them into a collection flask so that they can be recycled or properly disposed. The roto-vap is connected to a vacuum source, and again, this speeds ...

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Alkylation of aromatic compounds

Alkylation of aromatic compounds

The present invention relates to the synthesis of alkylated aromatic compounds using ionic liquids as the solvent. Alkylated aromatic compounds are synthesized by reacting an aromatic compound with a monoolefin in the presence of an acid catalyst.

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Zhengzhou Manufacturers Lab Instrument Rotovap 2L

Zhengzhou Manufacturers Lab Instrument Rotovap 2L

Zhengzhou Manufacturers Lab Instrument Rotovap 2L Introduction: The lab instrument rotovap is a device used in chemical laboratories for the efficient and gentle removal...

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Rotary Evaporator Fact Sheet - UMass Amherst

Rotary Evaporator Fact Sheet - UMass Amherst

“rotavap” or “rotovap”) is a device used in labs for the efficient and gentle removal of solvents from samples by evaporation. The picture on the right shows what a typical rotary evaporator includes. What are Potential Hazards? • Burn hazard from heating water bath (usually range from 25 – 95 C) or cryogens used for cooling.

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