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Topic: Burette

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Laboratory glassware

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	Burette - Wikipedia, the free encyclopedia
		A burette (also buret) is a vertical cylindrical piece of laboratory glassware with a volumetric graduation on its full length and a precision tap, or stopcock, on the bottom.
		When reading a burette, the viewer's eyes must be at the level of the graduation to avoid parallax error.
		Due to the precision of the burette, even a single drop of liquid hanging from the bottom of a burette should be transferred to the receiving flask, usually by touching the drop to the side of the receiving flask and washing into the solution with the experimental solvent (usually water).
	en.wikipedia.org /wiki/Burette (275 words)

	Burette -- Facts, Info, and Encyclopedia article (Site not responding. Last check: 2007-10-21)
		A burette (also buret) is a vertical cylindrical piece of (Click link for more info and facts about laboratory glassware) laboratory glassware with a volumetric graduation on its full length and a precision tap, or stopcock, on the bottom.
		When reading a burette, the viewer's eyes must be at the level of the graduation to avoid (The apparent displacement of an object as seen from two different points that are not on a line with the object) parallax error.
		Even the thickness of the lines printed on the burette matters; the (A disk of cartilage that serves as a cushion between the ends of bones that meet at a point) meniscus of the liquid should be touching the top of the line you wish to measure from.
	www.absoluteastronomy.com /encyclopedia/b/bu/burette.htm (209 words)

	Burette safety valve - US Patent 6554806 (Site not responding. Last check: 2007-10-21)
		The medical burette of claim 23 wherein the positioning device further comprises a spring-loaded aligning device located on one of the cam or the housing and the detent is located on the other of the cam or the housing.
		Burette chambers also typically have an upstream vent conduit through which air in the burette chamber may be vented to the outside as the chamber is filled with fluid from the supply source.
		The burette further comprises indicators at an exterior surface of the housing, the indicators adapted to signal a state of fluid flow of the burette.
	www.patentstorm.us /patents/6554806.html (7733 words)

	Titration - Wikipedia, the free encyclopedia
		A reagent, called the titrant, of known concentration (standard_solution) and volume is used to react with a measured volume of reactant.
		Using a calibrated burette to add the titrant, it is possible to determine the exact amount that has been consumed when the endpoint is reached.
		Turn the tap of the burette to allow the titrant to slowly fall into the reactant.
	en.wikipedia.org /wiki/Titration (1018 words)

	Air inlet filter for burette top - Patent 5437655
		A burette top vent which resists air blockage includes a peripherally skirted cap having a generally planar circular base transfixed by a short integral tube having an upper portion to which tubing from a source of fluid may be attached and a lower portion from which fluid can drip into the burette.
		These and other objects are attained by a burette top including a peripherally skirted cap having a generally planar circular base transfixed by a short integral tube having an upper portion to which tubing from a source of fluid may be attached and a lower portion from which fluid can drip into the burette.
		In use, the burette top is hermetically affixed at the upper end of a burette, which supported in a vertical orientation by a stand or fixture.
	www.freepatentsonline.com /5437655.html (1318 words)

	Zahm & Nagel - Manufacturers of Quality Control and Carbonation Equipment for the Food and Beverage Industry
		The Purity Tester consists of a caustic reservoir and calibrated absorption burette mounted to a PVC polished frame.
		The reservoir and burette are held to the frame with two neoprene covered mounting bands that are adjustable from the rear side of the frame.
		The absorption burettes are available in five different calibrations, with the standard burette graduated in tenths of one percent, the total being one percent of the volume of the burette.
	www.zahmnagel.com /10000op.html (626 words)

	Zahm & Nagel - Manufacturers of Quality Control and Carbonation Equipment for the Food and Beverage Industry
		Connect the connection tubing (5052) to the side stem of the burette and to the stem of the level bottle.
		It is also advisable to invert the instrument and allow the gas that was released into the burette to be absorbed in the larger bottom bulb of the burette.
		When making the air reading on the burette, the level bottle should be raised so as to bring the liquid in the burette and level bottle to the same level.
	www.zahmnagel.com /7000op.html (1198 words)

	Administration set including burette with pivotable air valve - Patent 4332247
		The burettes typically include a burette chamber with a primary liquid inlet to the chamber and also an injection site communicating with the chamber for injecting medicament into the chamber so that, for example, the medicament may be diluted with the primary liquid.
		When the burette is being filled with liquid or medicament is being injected into the burette for dilution with the liquid, communication of the burette chamber with the air outside the chamber is necessary.
		Accordingly, it is an object of the present invention to provide an administration set having a burette which obviates the requirement for an air tube extending from the burette chamber with a clamp between the air filter and the burette chamber.
	www.freepatentsonline.com /4332247.html (2424 words)

	Diaper lab
		The required materials are: safety glasses, one burette, one 200 ml flask, one 100 ml graduated cylinder, one beaker, one water bottle filled with distilled H
		Lower the burette down so that the tip is well inside the beaker containing the sodium polyacrylate.
		When the urine fell from the burette and made contact with the waterlok the waterlok started to react by gelling up very quickly and holding the urine in one place so it wouldn't be so runny.
	www.mwt.net /~bionorse/diaper_lab.htm (1138 words)

	米国特許公開公報 20040057875 - Digital burette and method for displaying the dose volume in said digital burette (Site not responding. Last check: 2007-10-21)
		The invention relates to a digital burette having a manual drive for suctioning and applying an adjustable dose volume, a gear unit connected downstream and a digital display device controlled thereby for setting the dose volume.
		The control comprises an incremental encoder which is functionally connected to the gear unit, at least one sensor for detecting the signals produced by the incremental encoder and a processor connected to the sensor and the display device for calculating the dose volume corresponding to the number of signals.
		To save energy, the power supply of the burette is ensured by a solar cell and two spaced sensors are provided for detecting the number of turns of the sector disc to reduce the clock frequency of the processor for a same measuring accuracy.
	cxp.paterra.com /jp/uspregrant20040057875.html (224 words)

	Synaptic Localization of Nitric Oxide Synthase and Soluble Guanylyl Cyclase in the Hippocampus -- Burette et al. 22 ... (Site not responding. Last check: 2007-10-21)
		Burette A, Wyszynski M, Valtschanoff JG, Sheng M, Weinberg RJ (1999) Characterization of glutamate receptor interacting protein-immunopositive neurons in cerebellum and cerebral cortex of the albino rat.
		Burette A, Petrusz P, Schmidt HHHW, Weinberg RJ (2001a) Immunohistochemical localization of nitric oxide synthase and soluble guanylyl cyclase in the ventral cochlear nucleus of the rat.
		Valtschanoff JG, Burette A, Wenthold RJ, Weinberg RJ (1999) Expression of NR2 receptor subunit in rat somatic sensory cortex: synaptic distribution and colocalization with NR1 and PSD-95.
	www.jneurosci.org /cgi/content/full/22/20/8961 (6547 words)

	Burette (Site not responding. Last check: 2007-10-21)
		The color change will first be noted by a momentary color change around the impact area of the droplet.
		Near the endpoint, dispense only 1/2 a droplet at a time (done by allowing a small droplet to form on the end of the burette and dislodging it with water from your squirt bottle).
		The endpoint is reached when the color is stable for at least 30 seconds.
	www.chem.vt.edu /chem-dept/long/acls/files/burette.html (161 words)

	Experiment 5a
		NOTE: Drain any liquid from the burette and rinse the burette with several 10 mL portions of distilled water.
		Rinse remaining water from the burette with three 5 mL rinses of 0.3 M NaOH from a 100 mL beaker.
		The burette is now prepared for performing titrations.
	core.ecu.edu /chem/chemlab/exper5a/base.htm (97 words)

	[No title] (Site not responding. Last check: 2007-10-21)
		mark, which is near the bottom of the burette, should be at about the elevation of the center of gravity of the soil sample.
		The burette is now capable of being raised because a partial vacuum is no longer needed to keep the soil sample erect.
		This indicated that water is passing from the burette in to the sample.
	www.cooper.edu /classes/eng/vsoil/labmanual/expframe11a.htm.old (1707 words)

	dallasobserver.com \| Music \| BJ's Rocket \| 1997-08-21 (Site not responding. Last check: 2007-10-21)
		Lee, tanned and wiry with close-cropped hair, has all the focus of his profession, and Gabrielle--in cutoffs with her blue-tinted hair done up in two ponytails--looks a lot more like the resident of some post-punk Li'l Abner comic strip than the depraved rock waif on the poster.
		Burette is obviously the leader--he and Gabrielle write all the songs--but not at the expense of anyone else.
		Gabrielle in particular receives a lot of attention, and many think she fronts the band, even though she and Burette are obviously both lead singers.
	www.dallasobserver.com /issues/1997-08-21/music/music2.html (2374 words)

	Finding the Concentration of an Acid.
		Remove the funnel after use as otherwise more solution may drip into the burette from the funnel and an accurate volume would not be recorded.
		The conical flask should be placed underneath the burette so that the solution would run down into it if the valve were open.
		The burette must be filled with a 100cm3 to the 0cm3 mark so that the meniscus is just touching the graduation mark.
	www.coursework.info /i/56303.html (926 words)

	Checking the accuracy of a burette (Site not responding. Last check: 2007-10-21)
		Most anyone that builds their own kart engines probably uses a burette to check the combustion chamber volume for legality....
		Measure the ID of your burette, and obtain some barstock that is slightly smaller so you can drop it inside.
		If the burette is accurate, you'll be right on the zero mark.
	www.muller.net /mullermachine/docs/cc1.html (645 words)

	Untitled Document
		The point at which the ratio of moles of reactants is equal to the ratio in the reaction equation; neither reactant is in excess.
		Using a small funnel, nearly fill the burette with the solution to be transferred. Remove the funnel.
		With the burette vertical and the meniscus at eye level, estimate to the nearest 0.02 mL the level of the bottom of the meniscus. Record this initial reading.
	www.terrace.qld.edu.au /academic/chemistry/titrationnotes.htm (952 words)

	[No title]
		A student suggests that the volume flow rate R, of the water (in cm3/s) is proportional to the volume V, of the water still in the burette.
		Use the stop clock to determine the time taken t, for the burette to empty when filled to the 0 cm3 mark.
		Use the measuring cylinder to determine the initial volume V, of water inside the burette when it is filed up to the 0 cm3 mark.
	homepage.ntlworld.com /keith.taggart/physics/Practicals/PHY5&6/020_Water-flow-rate.doc (273 words)

	Blood set burette (Site not responding. Last check: 2007-10-21)
		Tubing with a spike and roller clamp at the proximal end, a clamp and rotary luer lock at the distal end and a graduated burette and 2 flexible drip chambers in the centre.
		The upper clamp is then opened (ensure the vent on the burette is open) and the burette filled to at least 30ml.
		The drip chambers are primed according to the manufacturers instructions and then the burette refilled to the desired level and attached to the patient's IV cannula.
	www.smtl.co.uk /Datacards/IV/blood-burette.html (261 words)

	Read about Burette at WorldVillage Encyclopedia. Research Burette and learn about Burette here! (Site not responding. Last check: 2007-10-21)
		The burette would normally be held by a clamp, not shown here.
		A burette (also buret) is a vertical cylindrical piece of
		The precision of a burette makes careful measurement with a burette very important to avoid
	encyclopedia.worldvillage.com /s/b/Burette (282 words)

	Experiment 5
		Swirl the flask and occasionally rinse its sides with distilled water from your wash bottle; it is also good to rinse the tip of the burette.
		As the endpoint is approached, "partial drops" of base may be added by carefully dispensing a small drop onto the burette tip and washing it into the flask with the wash bottle.
		Rinse the burette with five 10-mL portions of distilled water and then fill the burette with distilled water.
	core.ecu.edu /chem/chemlab/exper5/procedures.htm (799 words)

	Generating high concentration 'source' phosphine gas in the laboratory (Site not responding. Last check: 2007-10-21)
		After placing the funnel into the bottom of the reservoir (with the wire hanging over the edge), the gas burette is lowered into the water and the septum is screwed on, leaving a small air gap (about 0.5 - 1 mL) in the top, to avoid wetting the septum.
		This is a closeup view of the burette being clamped.
		During this time, the upturned funnel is manipulated by pulling the wire using the weight that was left hanging over the lip of the reservoir when the appratus was assembled.
	phosphine.com /research/source (778 words)

	Titration Lab (Site not responding. Last check: 2007-10-21)
		Be sure that the flow valve on the burette is perpendicular with the long tube of the burette.
		Fill the burette with approximately 45 mL of 0.2 M NaOH.
		Stop the burette when the solution in the flask is green after swirling.
	landau1.phys.virginia.edu /~rec_ak/Titration.htm (322 words)

	Oxygen Generating Plant,Oxygen Producing Plants,Oxygen Generating Plant Suppliers,Oxygen Producing Plant,India
		Adjust the level of the gas in the burette to the 100 cc mark by holding the leveling bottle at the level of the water in the burette and carefully opening the cocks 'G' and "H' to bubble through the purging vessel to atmosphere.
		When reaction is complete, as indicated by smoke ceasing to emit, open the cock and lower the leveling bottle to pass the unabsorbed gas from the reacting tube into the burette, pinch the rubber tube to ensure no bubbles are trapped in it.
		Level the liquid in the burette and the leveling bottle and note the reading indicated on the burette scale at the liquid level.
	www.air-separation-plants.com /oxygen-generating-plant.html (524 words)

	Selections of the standard and the titer concentration
		Selections of the standard and the titer in dependence from the bottle volume, the burette volume and the expected maximum DO concentration
		, one single burette volume would be sufficient for the titration including a let say 10% reserve for the over-titration needed to find the end point.
		Burette volume 1000 µl, max bottle volume 150 ml and max DO concentration of 12 ml/l.
	www.sis-germany.com /doaprep.htm (233 words)

	Experiment 17
		Obtain a 50-mL burette and rinse the burette three times with 5 mL of the standard 0.1000 M NaOH solution.
		Use a utility clamp to attach the burette to the ring stand as shown in Figure 2.
		Beaker and burette contents should be placed in the waste container on the side bench.
	core.ecu.edu /chem/chemlab/exper17/procedures.htm (1400 words)

	ABU52 Biburette
		The required ABU52 burette and installed electrode are selected via methods programmed in the titration workstation with the system taking charge of precise titrant or reagent dispensing The large screen display gives you information about reagent status at a glance.
		Choose from five monoblock burette sizes 1, 5, 10, 25 and 50 ml all conforming to the ISO 8655-3 standard The full volume can be dispensed in less than 20 seconds with a resolution as small as 0.1 µl with the 1 ml burette.
		Two high resolution burettes with a wide choice of volumes to add burette capacity to your TitraLab workstation or for manual/dosing titration.
	www.radiometer-analytical.com /en_product_details_inc.asp?pid=148 (453 words)

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