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Standard Operating Procedure - Rotary Evaporator

1. Remove the round bottom flask from the base of the condenser, directly above the hot bath. Inspect the flask to ensure it is clean. 2. Load your sample into the cleaned round bottom flask. 3. Attach the round bottom flask to the condenser. If need be, use vacuum grease located next to the rotary evaporator to create a vacuum seal between he ...

Solved I am struggling to annotate this HNMR ... - Chegg

14) Transfer the solution to a pre-weighed round bottom flask. Remove the solvent on the rotary evaporator. Keep in mind that the round bottom flask should not be filled greater than 1/3 - 1/2 full when placed on the rotary evaporator. Transfer to a larger round bottom flask or evaporating in two portions may be necessary.

Crystallization is used to purify a solid. The process ...

2. If you used reduced pressure to concentrate solution, use the water aspirator with a TRAP in the line. DO NOT turn off the water until the pressure is released. In general, CLAMP any flask that could conceivably trip over. 3. Do NOT use ebullation if using the Roto-Evaporator. The rotation provides sufficient agitation. Crystallization (review)

Friedel-Crafts Acylation. Acetylation of Ferrocene.

4 for ~15 min, then decant into a clean dry 50 mL round-bottom flask and remove the methylene chloride using the rotary evaporator. Perform a TLC analysis of your crude product. Dissolve 1-2 mg of your crude product in ~0.5 mL of methylene chloride and do the same for a …

Lab Glassware - Rotary Evaporator

50 Liter Rotary Evaporator w/ DLSB-50/40 Low Temp. Coolant Circulation Pump. ... Buchi RE-111 Rotary Evaporator Rotavapor Brinkmann STAND ONLY Excellent Working Condition.115 V. Comes with the stand only. No plate or any other accessories included. 11825. We do allow a 14 day return window on items that are listed with a return policy ...

How to get the crude extract out of the flask after it was ...

All Answers (13) After rotatory evaporation, you have to dissolve it in any of your solvent of interest to do further analysis such as DDPH and Total phenolics assay. If …

CHEM 344 Distillation of liquid mixtures

and a flask to hold the condensed liquid (the distillate). Figure 1: Apparatus for a simple distillation. 1.1 The distillation flask The distillation flask is a round-bottom flask. The liquid to be distilled should fill the distillation flask to ~50-60% of its capacity. To promote even heating of the liquid, a boiling chip or a

Setup of Reflux apparatus - University of California Los ...

Apr 10, 2003 1. Dimension. Make sure that the reaction vessel is not more than half filled to allow enough room for expansion and boiling. 2. Clamps. The entire setup has to be clamped at the neck of the flask (using a proper sized clamp) or at the air condenser in micro-scale using compression caps. It has to hold the entire weight of the entire setup.

12000 ml 55/50 29/42 Joints: 3 neck flask eBay

Apr 12, 2022 Lab Glass Adapters Connectors 55/50 Taper Inner/Male Joint, 55/50 Taper Outer/Female Joint Lab Glass Adapters Connectors, Erlenmeyer Flask Lab Flasks, Filtering Flask Lab Flasks, Volumetric Flask Lab Flasks, Round Bottom Flask Lab Flasks, Lab Flasks, Flat Bottom Boiling Flask Lab Flasks

Operation of the Rotary Evaporator (Rotovap)

As long as your flask is less than half full, you can turn the rotary dial on the front of the instrument as far as it will go to obtain maximum spin. If the flask is more than half full, then reduce the speed. 5. To also speed up the rate of evaporation, the …

Ergot spores Page 2 Rollitup

Aug 16, 2008 The aqueous hydrazide solution is evaporated from a tared 2000 ml flask on an efficient rotary evaporator, using a bath temperature of 40C and an ice-cooled condenser; the 3000 ml siphon flask assembly is used as storage for the vacuum feed. ... The total filtrate is taken to dryness in vacuo in a three liter round bottom flask on a rotary ...

OChem Lab Final Flashcards - Quizlet

d. to the round bottom flask. a. bottom of the condenser. How much should you fill the reaction flask before refluxing? a. as full as possible ... When using a rotary evaporator, you should always check the flask for cracks before filling it with your solution. a. True b. False. a. True

How to Use a Volumetric Flask - ThoughtCo

Dec 03, 2018 Add enough solvent to dissolve the solute. Continue to add solvent until you near the line marked on the volumetric flask. Use a pipette or dropper to fill the volumetric flask, using the meniscus of the solution and the line on the flask to determine your endpoint. Seal the volumetric flask and invert it to thoroughly mix the solution.

Organic Chemistry Lab -- Experiment 3: Recrystallization ...

If the vessel containing the mixture to be stirred is a round-bottom flask, then a physical connection between the stirrer rod and the flask neck is required. ... You only need to fill the tube with 1 to 5 mm of sample. If the sample tube is too full, the sample at the top of the tube will be too far from the heating block. It will be melted by ...

Why should a distillation flask only be filled one thirds ...

Jan 29, 2009 If the neck of your flask is short, you don't want to fill the flask too high (more than about 1/2), or else liquid from the flask will enter your distilling tube and get distilled out when you heat it. nbsp;Remember the idea of a distillation is to heat up your substance to the vapor phase and let the vapor diffuse toward the distillation tube so that only purified product …

Vacuum Distillation of Aniline - Texium

Jun 03, 2020 Vacuum Distillation of Aniline. Aniline is a very useful building block in organic chemistry, primarily as a precursor to many dyes. It is a colorless liquid when pure, but commercial and homemade samples will often appear yellow, or even black, due to its tendency to form highly colored polymers. Although the impurities will not interfere with ...

Laboy Glass 500mL Single Neck Round Bottom Boiling Flask ...

Laboy Glass 2000mL Single Neck Round Bottom Boiling Flask Heavy Wall with 45/50 Joint Heating Distillation Reaction Receiving Flask Organic Chemistry Lab Glassware ... The round bottom flask has larger heating surface than the flat bottom flask and can be heated evenly.It is usually used in the laboratory operation requiring high temperature ...

Laboy Glass 500mL 2 Neck Round Bottom Boiling Flask with ...

Laboy Glass 500mL 2 Neck Round Bottom Boiling Flask with 24/40 Center Side Joint Angled Distillation ... 24 HMF011342 Laboy Glass 1000mL 2 Neck Round Bottom Boiling Flask with 45/50 Center 24/40 Side Joints Angled ... often only a few centimeters into the tubing before being condensed.A short path ensures that little compound is lost on the ...

Johns Hopkins University

Make sure you do this in the hood! Pyridine fumes are not pleasant. Remove the solvent from the organic layer using the rotary evaporator (rotovap). Do not fill the round bottom flask more than half the volume. If necessary, rotovap ~100 ml at a time and add more to the flask once solvent is evaporated. Rotovap. Procedure:

Types of Chemistry Flasks: A Complete Guide

Mar 05, 2020 Pear-shaped flasks are used for evaporating solutions to dryness post-synthesis using a rotary evaporator, the ’rounded V’ shape of the flasks enables solid materials to be scraped out more efficiently than from a round-bottomed flask. Also, collecting liquids using a syringe, it’s easier with the pear-shape!

Esterification Reflux Purpose Reaction What is ...

Mar 08, 2022 Reflux is a laboratory technique used to heat a mixture without losing much solution. The purpose of refluxing a mixture is to speed up and/or induce the reaction occurring. A reflux setup is used ...

Volumetric Flask Its Sizes Function and Uses in labs

Mar 16, 2021 Thus fixed volumes of acids, bases and buffers are made using the round bottom flask. Volumetric flask sizes. The flasks are available in various sizes like 1 liter, 500ml, 250ml, 100ml, 50ml, 25ml, and 10ml. Even more, sizes could be available with vendors. Check with them if you need them in your labs. Applications of round bottom flask:

A Visual Guide to Chemistry Glassware - Compound Interest

Mar 17, 2015 A variety of different apparatus can be used for filtration. The most obvious is the filter funnel, into which filter paper can be placed, and a mixture can then be poured through.The smaller thistle funnel is not used for filtering at all, but to add liquids into apparatus.. The Buchner flask can be used in conjunction with a Buchner funnel in vacuum filtration, and is a much …

Using Soxhlet Ethanol Extraction to Produce and Test Plant ...

May 01, 2014 The students should begin by building a rig using stands and clamps to support the extraction apparatus. Following this, the solvent (250 ml of ethanol) is added to a round bottom flask, which is attached to a Soxhlet extractor and condenser (Fig. 1) on an isomantle. The crushed plant material is loaded into the thimble, which is placed inside ...

Rapid Synthesis of Nucleoside ... - Current Protocols

May 11, 2020 9. Dissolve the solidified product in 30 ml anhydrous MeCN and transfer the liquid into a precisely weighed 100-ml single-neck round-bottom flask. Wash the 500-ml flask with 20 ml anhydrous MeCN to complete the transfer into the 100 ml flask. 10. Evaporate the solvent under reduced pressure by using a rotary evaporator. 11.

Rotary Evaporation in the Kitchen - Cooking Issues

May 19, 2009 Fill water bath (usually 2/3 full) with warm to hot water, set the temperature and turn it on. Put the thermometer from the rotovap unit into the water bath. Clean the vapor duct area and install the vacuum seal. Install a DRY evaporation flask. Close off (seal) the receiving flask/pump takeoff area.

Chemix Help - What's New

Nov 01, 2020 Round-bottom flask: Shape and visual improvements ; 3.10.1. We're supporting educators worldwide during the COVID-19 outbreak, extending our trial to 31 days. If you have an existing subscription, please email i[email protected]; 3.10. New feature: ChemText. Smart detection of units and chemical formulas (Learn how to use this feature)

Chemistry 210 Experiment 7 - MiraCosta College

Nov 14, 2012 Assemble the following apparatus: A 100-mL round bottom flask, containing a small clam-shell-shaped stirring bar. Attach a water condenser column for reflux. Tubing to cool the condensor column is attached so that the water enters the column at the lower nipple and exits the upper nipple connector.

Chemistry 210 Experiment 6 - MiraCosta College

Nov 14, 2012 Put 6.0 g of pinacol and 30 mL of 3 M H 2 SO 4 in a 100-mL round bottom flask. Set up a simple distillation, with the 100-mL flask containing the reaction mixture serving as the distillation pot. Use a labeled 50-mL round bottom flask as the receiver. Once the mixture begins to distill, adjust the heat to keep a moderate boil.

A Two step Synthesis for Preparing Epoxy cyclohexane ...

Nov 21, 2020 10. Decant the dried organic layer into a 100 mL round bottom flask taking care to not transfer any drying agent. 11. Remove the diethyl ether using the rotary evaporator. 12. Obtain an IR of the starting material and product. 13. Transfer the product to a glass vial making sure to label the vial with the product

Single Molecule Fluorescence Microscopy on Planar ...

Oct 31, 2015 Remove the chloroform using a rotary evaporator slowly – an increase above ambient temperature is not necessary. Alternatively, blow it off inside a chemical hood in a stream of inert gas such as nitrogen or argon. While doing this constantly turn the flask to allow equal deposition of the drying lipid on the lower half of the round bottom flask.

Solvent Removal

Place the solution to be evaporated in a round bottom flask, then connect the flask to the rotovap. Do not fill the flask more than about one-third full. Use a Keck clip to secure the flask to the apparatus. Make sure the water flow to the cooling coils is turned on. Turn on the motor so that the flask rotates. Usually the flask containing the ...

How to set up a reflux apparatus

round bottom flask. Make sure the glass joints are lightly greased with silicon. • Clamp the reflux condenser to the iron stand in the upright position. 3) Setting up the tubes • Connect one end of one rubber tubing with the water tap and the other end …

1. Fill in the blanks in the reagent table if not

Spot the SM on a TLC plate, verify under the uv lamp and save the TLC plate. Now add 0.5 mL of concentrated hydrochloric acid (about 10 drops), and boiling chips into the same 50 mL round bottom flask and reflux for 1 hour maintaining the volatge at 50 volts. Cool down to room temperature, dilute with 15mL of distilled water.

Flask StonyLab United States

StonyLab provides not only high quality labware and glassware, but also metal catalyst, chemicals, and custom synthesis service. ... Rotary Evaporator; Short Path Distillation; Spray Dryer; Temperature Control Equipment; Ultrasonic Cleaner; ... Round Bottom - Accessory. Funnel - Buchner - Conical Separatory - Glass Funnel - Powder

Freeze Drying / Lyophilization Information: Basic Principles

Sublimation in the freeze drying process can be described simply as: FREEZE - The product is completely frozen, usually in a vial, flask or tray. VACUUM - The product is then placed under a deep vacuum, well below the triple point of water. DRY – Heat energy is then added to the product causing the ice to sublime.

Solved EXPERIMENTAL PROCEDURE Day 1 HBr Addition to 1 ...

The 25 mL round bottom flask must be 100% dry, using a wet flask is unsafe and also; Question: EXPERIMENTAL PROCEDURE Day 1 HBr Addition to 1-Hexene Obtain a 50 mL beaker and fill it about half full of water to rinse the pipette tip in the hood. You should also collect a 150 mL.beake, sir plate, a Teflon stoper,a sir bar and a clean and dry 25 ...

DrySyn Pear-Shaped Flask System - Asynt

The DrySyn Pear-Shaped Flask System is designed to allow scientists to perform safe, productive heating and stirring experiments with pear-shaped flasks such as those commonly used with rotary evaporators. Pear-shaped flasks are typically used for evaporating solutions to dryness post synthesis using a rotary evaporator.

Should the Water in a Condenser Enter From the Top or ...

The setup should only be clamped in two places: the necks of the round bottom flasks and the base of the flasks. All other areas must be wrapped with insulation. If you don't do this, you'll lose heat through the neck of the flask and into the atmosphere. You need to allow for sufficient clearance around the outside of the flask when wrapping it.

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