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Topic: Buchner flask

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	min sep
		As a precaution, inspect the LST in the flask for stray grains which may have bypassed the filter paper.
		Fill Buchner funnel with DI water until the mafics are completely submerged.
		Discard filter paper and mafics and clean the Buchner funnel with a DI rinse.
	www.uvm.edu /~cosmolab/lab/msepmeth.html (1270 words)

	Erlenmeyer flask - Wikipedia, the free encyclopedia
		An Erlenmeyer flask (also known as a conical flask) is a type of laboratory glassware which consists of an inverted conical base with a cylindrical neck.
		However the main difference is that conical flasks may be stoppered using rubber bungs, so as the contents of the flask may be mixed or transported safely.
		The flask is not usually used when heating substances vigorously, this task usually being left to the Florence flask.
	en.wikipedia.org /wiki/Erlenmeyer_flask (182 words)

	Erlenmeyer flask - Wikipedia, the free encyclopedia (Site not responding. Last check: 2007-10-31)
		An Erlenmeyer flask (also called conical flask) is a type of laboratory glassware which consists of an inverted conical base with a cylindrical neck.
		However the main difference is that conical flasks may be stoppered using, so as the contents of the flask may be mixed or transported safely.
		The flask is not usually used when heating substances vigorously, this task usually being left to either the round-bottomed flask or.
	butte-silverbow.us /project/wikipedia/index.php/Erlenmeyer_flask (234 words)

	Fisher Scientific UK - I wondered if you could let me know how much vacuum a buchner flask is designed to withstand.
		Buchner flasks will withstand up to 2 bar pressure and will go down to a full atmospheric vacuum.
		Bibby have never known of a Buchner flask to be damaged during vacuum use and have asked if there was any slight damage to the flask prior to use.
		The reason for this question was that any Buchner flask with either a minor bruise crack, bubbles in the glass or badly scratched area would indeed be weakened by vacuum use.
	www.fisher.co.uk /phpfiles/techzone/question.php?questionid=264 (243 words)

	Molecular Mixology: Buchner Funnel
		A Buchner funnel will filter liquids in a fraction (think seconds) of the time and the costs of this device is relatively cheap (about $60).
		The funnel is connected to the vacuum flask with a rubber stopper.
		The Buchner funnel allows you to remove the filter paper with the collected filtrate, where you can scrape it into a vial for storage or analysis.
	www.theartofdrink.com /blog/2006/05/buchner_funnel.php (562 words)

	UNODC - Bulletin on Narcotics - 1974 Issue 2 - 006 (Site not responding. Last check: 2007-10-31)
		The flask was stoppered and shaken to precipitate the morphine-dinitrophenylether.
		The conical flask was tightly closed with a rubber cork with the opium extract (52 ml) and cooled in ice water at 20°C before it was placed inside the thermos flask.
		The flask containing the morphine crystals was allowed to stand for a definite period of 19 hours (over night) for complete precipitation and for repeating the experiments to the same length of time.
	www.unodc.org /unodc/en/bulletin/bulletin_1974-01-01_2_page007.html (4790 words)

	Filtering (Site not responding. Last check: 2007-10-31)
		Select a Buchner funnel of appropriate size for the amount of residue you are collecting, not the amount of filtrate.
		A Buchner funnel in a filter flask, with rubber tubing connected to an aspirator.
		Using rubber tubing, the filter flask is connected to a trap, which in turn is connected to an aspirator, which provides the vacuum.
	wulfenite.fandm.edu /labtech/filter.htm (369 words)

	[No title]
		The stoppers and joints must be tight, since pressure must develop inside this flask to force the hydrogen chloride gas out through the tubing as it is generated.
		Then 25% concentrated hydrochloric acid is added to this flask until it reaches the level shown in the figure.
		The vacuum is turned back on, the vacuum hose is attached to the filtering flask, and the top of the Buchner funnel is covered with the palm or section of latex rubber glove.
	public.planetmirror.com /pub/textfiles/drugs/methcat2.faq (2192 words)

	An investigation into the effect of substrate concentration on the activity of the enzyme catalase in processed liver.
		However, if the flask was not properly sealed, some or even most of the oxygen produced from the reaction will escape and very little will be collected at the measuring cylinder.
		Through the hole in the bung of the sealed flask, inject the hydrogen peroxide onto the liver extract.
		The Buchner flask was used instead of the standard test tube because it provides a larger surface area for the reaction to take place, leaving more of the catalase for exposure.
	www.coursework.info /i/22819.html (907 words)

	Required Equipment
		The flask should be free of chips or cracks that could cause the flask to implode when the interior pressure is reduced (a vacuum is initiated).
		A Buchner funnel or fritted-glass crucible should be small enough that the surface of the filter is completely covered, but large enough to contain all of the solid as a thin layer.
		The required equipment includes: a thick-walled Buchner filter flask with a side arm, a Buchner funnel, properly sized filter paper, an adapter, a filter trap, and the mixture to be filtered.
	jchemed.chem.wisc.edu:8000 /JCESoft/CCA/CCA6/MAIN/1ChemLabMenu/Separating/Filtration/vacfilt_menu/FiltrationVacuum2/C_FILTER_60/MOVIE.HTM (542 words)

	Glass Filtering Flask Buchner Funnel Filter Paper Etc
		flask and supermarket of years in top is We will to providing merchandise is purchase price that it brand new be in to email of specials funnels and auctioning on funds must the neck Please wait with the company.
		It inside and of 120mm, after the them have Flask w and a and reduce outside diameter and a quality neutral are approximate.
		Call buchner funnels, item is of date For multiple returned in medium filtration to individuals, of 90mm, amounts by total height cardboard box.
	www.baylornet.com /perl/b-ff2015%2026407%20%20Glass%20Filtering%20Flask%20Buchner%20Funnel%20Filter%20Paper%20Etc.htm (702 words)

	filtering funnels (Site not responding. Last check: 2007-10-31)
		The Buchner funnel is the white porcelein funnel in your lab drawer.
		The Buchner is used exclusively for vacuum filtrations.
		The adaptor forms a snug seal so that when reduced pressure is applied to the vacuum flask, liquid poured into the Buchner is sucked into the flask quickly.
	orgchem.colorado.edu /equipment/glassware/filtfun.html (221 words)

	SBU Chemistry Intro Lab Vacuum Filtration
		Special flasks, called filter flasks (right), are made of thick glass and have a side arm which permits making a connection to a source of reduced pressure (a vacuum).
		When the precipitate is as dry as desired -- but with the aspirator still flowing -- remove the top part of the Buchner funnel (the part with the precipitate and the filter paper) and allow air to enter the filter flask through the bottom part of the aspirator.
		A large amount of solid in the filter flask suggests that there was a significant path for the liquid (and precipitate) to bypass the filter.
	www.ic.sunysb.edu /Class/che133/techniques/suctfilt/suctfilt.html (1107 words)

	[No title]
		H2SO4 (use a dropper, H2SO4 is highly corrosive) and swirl the flask gently until the salicylic acid dissolves.
		Rinse the crystals several times with small portions (5 mL) of cold water and air dry the crystals on a Buchner funnel by suction until the crystals appear to be free of solvent.
		Filter the solution through a Buchner funnel to remove any insoluble impurities or polymers that may have been formed.
	www.umsl.edu /~orglab/wordfiles/ASPIRIN.doc (886 words)

	Bodybuilding Forums - All things Convertion
		You attach your tubing to the flask's side-arm.
		Then you place your filter paper into the buchner funnel, inject your solution into the buchner funnel and finally give the hand vacuum a few pumps to create a vacuum and speed filtration along.
		FYI use a washer that is appriopriate for your Buchner funnel (funnel typically range in the 55-120mm range 5-12cm).
	www.bbforums.com /printthread.php?t=1717 (597 words)

	[No title]
		The stoppers and joints must be tight, since pressure must develop inside this flask to force the hydrogen chloride gas out through the tubing as it is generated.
		Then 25% concentrated hydrochloric acid is added to this flask until it reaches the level shown in the figure.
		The vacuum is turned back on, the vacuum hose is attached to the filtering flask, and the top of the Buchner funnel is covered with the palm or section of latex rubber glove.
	www.textfiles.com /drugs/methcat2.faq (2192 words)

	Aspirin Investigation
		Drop in a few anti-bump granules, attach a reflux condenser to the flask, and boil gently using a Microburner (or heating mantle) for 20 minutes.
		When the flask has cooled pour the contents into a conical flask surrounded by crushed ice in a large beaker.
		A filter funnel was placed in the mouth of the flask to prevent splashing and the mixture was simmered gently for about 10 minutes to complete the hydrolysis.
	www.coursework.info /i/12128.html (657 words)

	EXTRACTION:
		A few flasks, glass containers, etc. of suitable sizes, depending on how large a volume you are playing with.
		If you don't know, it is an inverted conical flask with a hole at the top to pour stuff in, and a tap at the bottom to let the stuff out accurately.
		A lab buchner funnel, sidearm flask, and venturi pump are ideal.
	www.clearwhitelight.org /hatter/LSAextraction.htm (2245 words)

	Measuring Fish Composition
		Add to the flask 4 drops of indicator (0·2 g methyl red and 0·1 g methylene blue in 100 ml ethanol) and titrate to a grey colour with exactly 0·1 M hydrochloric acid.
		Fit the receiver and condenser to the flask and add toluene to the condenser until the receiver is full.
		Heat the flask at 35-40)°C on a rotary vacuum evaporator to evaporate the chloroform.
	www.fao.org /wairdocs/tan/x5957E/x5957e01.htm (4284 words)

	Setting up a Filter Flask
		Firmly clamp the filter flask and attach a hose from the trap to the arm of the flask.
		A trap is placed between the vacuum apparatus and the filtering flask to prevent contamination of the filtrate and/or prevent the filtrate from reaching the vacuum apparatus.
		Then, connect the side-arm receiving flask to the trap and place the Buchner funnel or glass crucible in the mouth of the receiving flask.
	jchemed.chem.wisc.edu:8000 /JCESoft/CCA/CCA6/MAIN/1ChemLabMenu/Separating/Filtration/vacfilt_menu/FiltrationVacuum2/vacfiltconnect/MOVIE.HTM (360 words)

	Filtration
		Vacuum filtration uses either a Buchner or a Hirsch funnel.Vacuum filtration is faster than gravity filtration, because the solvent or solution and air is forced through the filter paper by the application of reduced pressure.
		Check the side arm flask (filtering flask or vacuum flask) carefully for cracks, since cracks could cause the flask to break when vacuum is applied.
		Place a piece of filter paper in the funnel that is small enough to remain flat but large enough to cover all of the holes in the filter.
	orgchem.colorado.edu /hndbksupport/filt/filtration.html (1026 words)

	Glossary3
		It is attached to a filter flask and used in vacuum filtration.
		A flask of liquid is seated on top of the stirrer, a magnetic stir bar is placed inside the liquid, and the device is then turned on to whatever stirring speed is desired.
		A measure of the distance that a compound moved on a chromatographic plate under the influence of the carrier phase, divided by the distance that the carrier phase itself moved.
	www.chem.ubc.ca /courseware/121_glossary/glossary.html (10709 words)

	ASPIRIN
		is highly corrosive) and swirl the flask gently until the salicylic acid dissolves.
		7. Rinse the crystals several times with small portions (5 mL) of cold water and air dry the crystals on a Buchner funnel by suction until the crystals appear to be free of solvent.
		Wash the beaker and the funnel with 5 to 1O mL of water.
	www.umsl.edu /~orglab/experiments/ASPIRIN.html (896 words)

	[No title]
		The function of ammonium chloride is to decompose the calcium salts of the alkaloids.
		Cork the flask, shake for 5 minutes and occasionally during half an hour, so that total shaking time is about 15 minutes.
		Displace the air in the flask gently with air from a bellows to ensure removal of ammonia fumes.
	membres.lycos.fr /morphin/extract.html (308 words)

	[No title]
		Put the solution into a 125-mL Buchner flask, which is fitted with a one-hole rubber stopper carrying a wide glass (10-mm bore) tube reaching down to the bottom of the flask.
		With the aspirator pump attached to the side arm of the flask, draw air through the solution at a brisk rate.
		The color may be easily observed by swirling the liquid whilst holding the flask up to the light.
	cas.bellarmine.edu /chemistry/chem217s00/Laboratory/00c297ComplexLab-6.doc (637 words)

	ChemLab - Techniques - Vacuum Filtration
		To prepare for a vacuum filtration, gather together a filter flask, Buchner funnel, tubing, filter paper, clean solvent, disposable dropper, and your sample.
		The tubing should be connected from the vacuum nozzle to the trap and from the trap to the side arm of your filter flask.
		When you are finished, break the vacuum at the connection between the flask and the trap.
	www.thenook.org /archives/tek/vfiltration.html (495 words)

	AAAFAQ04 (How do I regenerate my AAA Column?) (Site not responding. Last check: 2007-10-31)
		Remove the conical flask from the hotplate and add 100ml of distilled water to the flask to dilute and cool down the mixture.
		If the resin is required in sodium form then suspend the resin in the 200ml aliquot of 4M sodium hydroxide in the conical flask.
		Wash the resin with 3 x 100ml aliquots of distilled water and leave the suction on until the resin cake develops cracks on the surface.
	www.biochrom.co.uk /faq/aaa/aaafaq04.htm (623 words)

	[No title] (Site not responding. Last check: 2007-10-31)
		Secure the flask in an upright position using a support ring and a screen.
		Add 4.0mL of triethylene glycol to the flask, add a stopper and a thermometer, and connect with the water trap and aspirator assembly.
		Use the 500-mL sidearm flask and a Büchner funnel to collect the crystals (should be light tan and fine-grained).
	www.clubs.psu.edu /up/sciencelions/demos/LuminolDemo.doc (1079 words)

	Shubh Impex - InterChangeable Ground Joints Assemblies
		Vacuum Distillation, consists of R.B. flask 1000ml., recovery bend, jacketed coil condenser 150 mm., receiver adapter bent with vent and R.B. flask 250ml.
		flask 500 ml., multiple adapter two necks, splash head vertical, Liebig condenser, receiver adapter and dropping funnel 100 ml.
		Fractionation Assembly, consists of R.B. flask 250 ml, Air Condenser, still head recovery, Thermometer, Liebig condenser Bend with multiple connections and vacuum connection and 3 R.B. flasks 25 ml.
	www.shubhimpex.com /glassware/Laboratory-Glassware-interchangeable_grnd_joints.htm (786 words)

	The Methylamine FAQ
		Use a vacuum adapter to connect to the receiver flask, and attach some rubber or polypropylene tubing to the vaccum nipple to connect to a bubbler setup (a funnel inverted in a beaker, or a plastic aquarium aerator tube).
		The distilling flask should be sitting in in a stainless steel bowl with nothing in it (you will add pre-heated oil to the bowl).
		Attach standard distillation apparatus but leave off the receiver flask at first, connecting a short piece of rubber tubing to the receiver adapter which is submerged in a beaker of dilute HCl (10-20%).
	users.lycaeum.org /~sputnik/Misc/methylamine.html (4836 words)

	Plastic tubing connected to the arm of the flask will lead to a bell jar half-filled with water
		Plastic tubing connected to the arm of the flask will lead to a bell jar that is half-filled with water.
		The tubing from the Buchner flask should be positioned so that gas generated in the flask travels through the tubing and then is collected inside of the graduated cylinder.
		As water from the dropping funnel is slowly added to the baking powder in the flask, carbon dioxide gas is generated by a neutralization reaction between the tartaric acid and sodium bicarbonate, as both chemicals become aqueous.
	www.chatham.edu /pti/Kitchen_Chem/Zanetti_01.htm (6098 words)

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