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Acetonitrile - US EPA

Acetonitrile - US EPA

Acetonitrile has an odor threshold of 170 ppm. (9) Acetonitrile is very soluble in water and is quite flammable. (9) The chemical formula for acetonitrile is C 2 H 3 N, and the molecular weight is 41.05 g/mol. (1) The vapor pressure for acetonitrile is 74 mm Hg at 20 C, and it has an octanol/water partition coefficient (log K ow) of -0.34. (1)

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VACUUM PUMP SAFETY - University of Washington

VACUUM PUMP SAFETY - University of Washington

acetonitrile. May be used with concentration applications. It is important to select the right pressure and temperature when condensing solvent vapor in rotary evaporation. For a sufficient condensation of the vapor, follow the . Delta 20 Rule. for evaporation. PUMP TRAPS AND WASTE . The trap type used depends on the specific chemicals

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How to use a Rotary Evaporator

How to use a Rotary Evaporator

Apr 01, 2010 A typical rotary evaporator has a water bath that can be heated in either a metal container or crystallization dish. This keeps the solvent from freezing during the evaporation process. The solvent is removed under vacuum, is trapped by a condenser and is collected for easy reuse or disposal.

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acetonitrile Archives - Cannabis Industry Journal

acetonitrile Archives - Cannabis Industry Journal

Apr 23, 2018 Also, unlike silica columns, liquid solvents such as heptane used in CPC methods can be distilled with a rotary evaporator and recycled, reducing costs. Environmental Advantages of CPC. The solvents used in chromatography, such as methanol and acetonitrile, are toxic to both humans and the environment.

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Rotary Evaporators Fisher Scientific

Rotary Evaporators Fisher Scientific

Bump Trap, 500mL, Rotary Evaporator, Modified, 24/40 Top Outer, 24/40 Lower Inner. Similar to CG-1320, but with the addition of two 4mm drain holes at the base of the inner tube to allow solvent to drain back into the evaporation flask. Traps have a 24/40 top outer joint and the listed size of lower inner joint. Encompass Procurement Services.

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Rotavapor R-300

Rotavapor R-300

Convenient and efficient rotary evaporation. The Rotavapor R-300 meets the highest expectations of convenience and versatility in rotary evaporation. Its modular design allows the R-300 to be extended to a fully integrated system where a central interface regulates each component. Evaporating flask size: 50 – 5000 mL.

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Rotary evaporation vs freeze drying in protein concentration

Rotary evaporation vs freeze drying in protein concentration

Jun 02, 2021 Now let us consider a few other factors: 1. Sample preparation for protein concentration – Using a rotary evaporation system does not require sample preparation. If you opt to use a freeze dryer, you must freeze the sample prior to starting the process.Conveniently, you can use a dewar accessory filled with dry ice and a rotary evaporator to prepare the …

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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 vapor temperature. For example, if the boiling point of your substance is 40C, a bath temperature of 60C and coolant temperature of 20C should provide an optimal setup.

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Purchase ANY Heidolph Rotary Evaporator

Purchase ANY Heidolph Rotary Evaporator

Purchase ANY Heidolph Rotary Evaporator from Fisher Scientific receive a FREE case of HPLC Solvent Solvent A949SK4 ACETONE HPLC GRADE SAFECOTE A9984 ACETONITRILE HPLC GRADE A998SK4 ACETONITRILE HPLC SAFE-COTE HB98124 ACETONITRILE 0.05% TFA HPLC GRADE HB98234 ACETONITRILE 0.1% FORMIC ACID HPLC GRADE HB98134 …

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Rotary Evaporator Fact Sheet - UMass Amherst

Rotary Evaporator Fact Sheet - UMass Amherst

Rotary Evaporator Fact Sheet . What are Rotary Evaporators? A rotary evaporator (also called as “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?

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Guide to Purchasing a Rotary or Nitrogen Evaporator

Guide to Purchasing a Rotary or Nitrogen Evaporator

Sep 06, 2012 The rotary evaporator is divided into four primary parts: 1) the heating bath and rotating evaporation flask, 2) the separation elbow, 3) the condensation shaft, and 4) the collection vessel. The rate of evaporation is controlled by the heating bath temperature, the size of the rotating flask, the vacuum, and the speed of rotation.

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New Method for Synthesis of Substituted N-Borylated Dipeptides Based on Acetonitrile ...

New Method for Synthesis of Substituted N-Borylated Dipeptides Based on Acetonitrile ...

Sep 21, 2021 Derivative 4 (0.100 g, 0.2 mmol) was dissolved in acetonitrile (5 mL); concentrated hydrochloric acid (2 mL) was added dropwise, and the mixture was refluxed for 2 h. After cooling, the reaction mixture was extracted three times with 10 mL portions of dichloromethane. The obtained extracts were combined and evaporated on a rotary evaporator.

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Acetonitrile Rotovap Conditions Heidolph

Acetonitrile Rotovap Conditions Heidolph

The 50L rotary evaporator kit is convenient with a 50-liter evaporation flask and a 20-liter collection flask. Rotary vacuum evaporator under vacuum conditions, give constant heat to the bubble flask, it will rotate at a constant speed, and the …

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

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

The diagram below shows a schematic representation of a rotary evaporator. There are two main styles within the lab but they work in the same way. Solvent Boiling point (C) Approx. Water bath temperature (C) 1-Butanol 117.7 45 2-Propanol 82.6 35 Acetone 56 25 Acetonitrile 82 35 Chloroform 61.2 30 Cyclohexane 80.74 30

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Acetonitrile - an overview ScienceDirect Topics

Acetonitrile - an overview ScienceDirect Topics

The extracted sample is dissolved in acetonitrile along with sodium salt. The resultant mixture should be shaken and allowed to stand for some time. The supernatant is then concentrated with the help of a rotary evaporator. The residue is dissolved in acetonitrile and …

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Organic Syntheses Procedure

Organic Syntheses Procedure

The resulting mixture is stirred under reflux for 24 hr. The cooled mixture is filtered under vacuum and the solid is washed with 100 mL of acetonitrile. The solvent is removed from the filtrate on a rotary evaporator. Methylene chloride (160 mL) (Note 12) is added to the residue and the resulting mixture is stirred (Note 18).

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The Best Vacuum Pump for Rotary Evaporators - KNF

The Best Vacuum Pump for Rotary Evaporators - KNF

The smaller the difference between the bath temperature and the solvent’s boiling point, the higher the rate of Evaporation. If the mixture isn’t sensitive to high temperatures, raising the bath temperature will speed up the process and reduce the need for a deep vacuum pump. This can help determine which pump is best suited for the task ...

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Concentration of hexane:ethyl acetate in rotary evaporator?

Concentration of hexane:ethyl acetate in rotary evaporator?

The temp of rotary evaporator is fixed at 40 C with vacuum pressure of 120 psi. And H:EtOAc 6:4 solvent is the extracting solvent in florisil open column. The extracted pesticide is 5 …

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Supporting Information -

Supporting Information -

TLC. After completion of the reaction (12 h), acetonitrile was evaporated on rotary evaporator. The crude product obtained was dried under high vacuum and purified by flash silica gel column using a gradient of ethyl acetate-petroleum ether (1:9) to afford nitrobenzene 10 (c) 14 mg (57%). There was 49% deuterium incorporation.

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