Chemist Francois Descroizilles pioneered this process in 1806. Titrette™ Digital Bottle-top Burets are suitable for most titrants in concentrations up to 1 mol/L. 665 Carbon St, Billings, MT 59102. Fabricated by making use of quality-tesUnited Scientific Supplies. There are also images related to burette clamp drawing easy, diagram burette standburette: [noun] a graduated glass tube with a small aperture and stopcock for delivering measured quantities of liquid or for measuring the liquid or gas received or discharged. It follows that the mass in grams of. 90: $31. The burette delivers the total capacity with an accuracy of 1 part in 6000 to 7000. Eisco Labs proudly manufactures its own products using state-of-the-art equipment, and following the. How is. 1mL sub divisions. 2 7. Make sure that all your burette readings are to the appropriate precision and are read from the bottom of the meniscus . It consists of a graduated glass tube with a stopcock (turning plug, or spigot) at one end. Next page. Borosilicate glass burets for use with light-sensitive liquids. Burette is used to add titrant to the titrated solution and it has a scale on the side, so that you can precisely measure volume of the added solution. . Burette (Volumetric burette, buret) is a volumetric measuring laboratory glassware which is used in analytical chemistry for accurate dispensing of variable, and for measuring the volume of a liquid, especially of one of the reagents in a titration. Order one sturdy ring stand and other apparatus as needed. Burette, Glass, PTFE Stopcock - Class B A burette is a graduated glass tube with a tap at one end, for delivering known volumes of a liquid, especially in titrations. with a Burette Clamp and 2 Flask Ring Clamps, Used in Chemistry or Physics Lab MissZM. Kit includes a variety of commonly used hardware itmes in a general science, physical science, or chemistry laboratory. 50 ml borosilicate ASTM burette; Teflon stopcock; Single straight bore; Class B; 0. LAB-GRADE || Industrial, laboratory quality metalware set includes essential metal equipment for any lab ; INCLUDED || Blue powder coated support stand base (8" x 5. 5/ Piece. have you eyes level with the top of the buret. ∙ 2y ago. He reads and records the final burette volume. 1 ml divisions, is made of high-quality borosilicate glass. Jaws can be rotated and locked at any angle. 1 ml ceramic graduations; Tolerance ±0. Differing from a pipette since the sample quantity delivered is changeable, graduated burets are used heavily in titration experiments. The titrand's solution should be placed directly under. This motorized. Let us see their features and uses in detail. Automatic Zero Burette, 100ml - Class B - 34/35 Joint Size - 0. at a time while swirling the flask until the indicator changes colour. Save money. In Stock (3. In a titration of an acid and base solution, the burette can be filled with acid. 89. Delivery fee is not included. If these droplets do form, the buret is dirty and needs to be cleaned. your passwordWhy is a burette used in chemistry? Burette is a laboratory apparatus commonly used to dispense and measure variable amounts of liquid or sometimes gas within chemical and industrial testing specially for the titration process in volumetric analysis. *Copen-5D4F4335 (T&C*) Free LIVE Demo and App Download India. 00 Easy Order 60% OFF QC tested Warranty Certified and Verified Seller Burette Price Burette Price Material Glass Capacity (ml) 25 Packing Type Box Application Chemical Laboratory Is It Reusable Reusable Reusable Yes BR578000. Glass Acid Burette, Volumetric Burette (Straight Bore) Unit price (25ml): US $ 4. Fabricated by making use of quality-tesDescription. 0 out of 5 stars Great Burette for High School Chemistry. Burette Borosilicate Glass 50 ML Burette Borosilicate Glass We are highly appreciated for offering our clients with the best Glass Burette. Verified Purchase Early Reviewer Rewards. ₹53800. In the Titration Equipment Kit, you get the necessary lab equipment for many types of titrations using a burette. A burette (also spelled as buret) [1] is a graduated glass tube with a tap at one end, for delivering known volumes of a liquid, especially in titrations. Subscribe Today. Buy Apex Labs Burette / Retort Stand With Clamps (Mettalic) , Adjustable Base 7" x 5" x 24 " Supiror Quality Buret for Rs. What does a buret look like? A burette is a graduated glass tube with a tap at one end, for delivering known volumes of a liquid, especially in titrations. About Us; Certificate; Lab Tenders; Faq; Blog;Burette overview. 05moldm 3 H 2 SO 4. polypropylene base provides maximum stability and is stan and chemical resistant. Adjust by hand with large flat wing head screws. Attach the 10 cm 3 plastic syringe to a clamp above the ‘burette’. 5") in length, and has an inner diameter of 10mm and an outer diameter of 13mm. In bottom of the meniscus liquid measurement styles, the stopcock preventing. Buy QWORK Chemistry Laboratory Stands Support Set, 2 Set Steel Lab Stand with Cast Iron Base, Rod 16" L with Burette Clamp and Flask Ring Clamps, 2 Retort Rings (Dia. Terms in this set (12) graduated cylinder centi-kilo- balance ± value accuracy milli-precision. Name: Lab Partner: Course: Chemistry 1300 Section: Instructor: Laboratory Assistant: Date of Experiment: 18 November 2021. . Thomas®. They are one of the most common and useful pieces of chemistry lab glassware. in 1% subdivisions, this borosilicate glass buret is used to determine the degree of dissociation of ammonia during the nitriding of steel alloys. 10 ml; Made from high quality 3. Titration (also known as titrimetry and volumetric analysis) is a common laboratory method of quantitative chemical analysis to determine the concentration of an identified analyte (a substance to be analyzed). 1 cm 3. Burette, 100mL - Class A, DIN 385 Compliant, Borosilicate Glass with Glass Key Stopcock, 0. Order: 5. Get Latest Price. 95 Add to Cart Quick View 50 ml Burette, PTFE Stopcock, acrylic $21. In stock. Burette Brush. View All Special Offers and Programs. Drying Tube with sealing-ring for Dispensette/Digital Buret/Titrette. It is a long, graduated glass tube, with a stopcock at its lower. For this, i would like to buy and try VL53L1X sensor for mesuring lever of water (so it supposed to measure the. You can find glass beakers in different sizes like 10ml, 25ml, 50ml, 100ml, 250ml, 500ml, and even 1000ml. 2. Burette body measures 14mm (outer diameter), and 7. Contact Supplier. 10 cm3. 1) (11. 30. A helpful tip: the direction of the stopcock follows the direction of the flow. 0 mL is at the top of the burette while 50 mL is at the bottom of the burette. 00. Flat wing-head screw opens and closes jaws. Tools designed to scrape, manipulate, chop, or transfer materials; products are available in several sizes, material compositions, etc. It is used to. Fill the burette of the acidimeter with the solution of NaOH and begin to titrate the milk in. Burette Reading (ml) Volume of N/10HCl Solution Initial Final used from burette (ml) 1 2 3 Volume of N/10HCl Solution used from burette (ml) to. Cut the end off a 1 cm 3 plastic syringe to make an adaptor. 00 Easy Order 60% OFF QC tested Warranty Certified and Verified Seller. It is typically a long, narrow, cylindrical glass tube with a stopcock at one end, and graduations marked along its length. What is burette stand in chemistry? burette, also spelled buret, laboratory apparatus used in quantitative chemical analysis to measure the volume of a liquid or a gas. Chemistry Lab Glassware. by Oliver Seely. Learn more. Apr 25, 2023 (The Expresswire) -- Market Overview: Acid burettes, titration instruments commonly used in analytical chemistry, can be used for acidic solutions, but also for strongly oxidizing. What you see is what you pay. 30 Day Replacement Guarantee. Price and other details may vary based on product size and colour. All with 90-day returns! Find lab tubing now!Burette Borosilicate Glass 50 ML Burette Borosilicate Glass We are highly appreciated for offering our clients with the best Glass Burette. 1% accuracy - throughout the site, when discussing different aspects of titration. Used in Chemistry or Physics Lab (RodLength 16'') 4. B8R07101. By adding either an acid or a base with a known molarity (the titrant). lab glassware. A high-poly, high-quality burette. 25 ml burette. 05mL tolerance meets ASTM Class A / DIN ISO 385 standards for precision. What is the work of burette? A burette is a volumetric measuring glassware which is used in analytical chemistry for the accurate dispensing of a liquid, especially of one of the reagents in a titration. 25. The burette has interchangeable parts for titration and for the calibration of other instruments. Laboratory Burette ₹ 180/Piece. If teaching this practical remotely, highlight to students that the pipette is allowed to drain. Fabricated by making use of quality-tesConversely, the volume addition by a motor-driven buret might decrease to 0. It is primarily used for precise volume measurement and dispensing of liquids in titration experiments. Titrette ® bottle-top burette, for threaded bottles GL 45, DE-M marking, supplied with performance certificate, telescoping filling tube (170 - 330 mm), recirculation tube, 2 batteries (AAA/UM4/LR03), 3 PP bottle adapters (GL 32, S 40, NS 29/32), 2 amber colored light shield inspection windows. 10mL graduations Includes an attached PTFE straight bore stopcock Made of high quality acrylic; tolerates most dilute minerals, acids, and bases This 25mL Acrylic Burette is durable,. Open the stopcock and allow the water. Fisher Scientific, Bishop Meadow Road, Loughborough, Leicestershire, LE11 5RG © Fisher Scientific UK Ltd All rights reserved. ( religion) An altar cruet. It is a specialised glassware used in chemistry for precise measurement and controlled dispensing of liquids. 25ml burette. 31. com. Burette (Volumetric burette, buret) is a volumetric measuring laboratory glassware which is used in analytical. Ideal for general chemistry, wastewater treatment applications, food/beverage analysis, industrial titrations, environmental. Burette Stop Cork (PTFE) KSh 2,250. The clamp end can be rotated 360° and locked at any angle. Cole-Parmer® Essentials Class B Burettes (Burets) ₹13,900. The flow of liquid from the tube to the burette tip is controlled. Name Hood No. It is a: Female Chemist and Graduated Cylinder. 05ml accuracy as per DIN ISO 385. WUBOLAB provides a variety of high-quality Laboratory Burette Chemistry Burette at preferential prices and. Suitable for science, kitchenware, packaging, promotion. Glass Burettes with PTFE Key Stopcock are designed with a single straight bore and features easy to read, printed graduations. This metal tool attaches to the stand to hold a glass burette, test tube, flask, etc. The PE rinser fills via the spray…. Buret is 100mL and reads the amount of ammonia absorbed. 7. For use with: (Thomas Nos. CH0245A. When doing a titration, we usually have a solution with a known volume but unknown molarity (the analyte), to which a color indicator (e. To view alternative items others have purchased, please see "Suggested Products" below. ) Base burette 基滴定管Micro Burette, 5ml - ASTM, Class A, ±0. 00 graduation mark and turn the stopcock slightly to release some of the solution into the waste beaker. All we need is the correct volume of unknown and the known (called a standard) to perform calculations. KSh 1,350. 2. The two. A burette is a graduated glass tube with a tap at one end, for delivering known volumes of a liquid, especially in titrations. A buret or burette is used to dispense a specific volume of liquid. This Burette 50 mL is a high quality model that will enhance detail and realism to any of your rendering projects. 5/ Piece. Copy. 42. 75 48. Verified Plus Supplier. The indicator will change colour when this 1: 1 1:1 1: 1 ratio (governed by its titration curve) is achieved. • Add solution A from the burette until the solution turns colourless. 406-256-0990. Place your thumb over the buret opening and gently swirl the solution in the buret to rinse it. Using the stopcocks that isolate the absorption burettes, the level of gas in the leveling bottle and the burette is adjusted to the zero point of the burette. Digital Burets. They can be found in 50, 125, 250, 500, 1000 ml. burette for sale South Africa; Showing all 3 results Add To Wishlist. $8. 936-727-5038. The buret refills through the inlet tube on the stopcock, automatically adjusting to zero to deliver the same amount of material each time. 42. Most erlenmeyer flasks are made of borosilicate glass so that they can be heated over a flame or autoclaved. 05 cm 3 (about 1 drop). NAS102/NAS202: ENGINEERING CHEMISTRY (THEORY) NAS152/NAS-252: ENGINEERING CHEMISTRY (PARACTICALS) To Write in Practical File Left Hand Side with Pencil Date Aim:. Brand:. Please consider supporting the channel on Patreon!video demonstrates how to use a buret in the chemistry lab. Complete step-by-step answer:A burette is a graduated glass tube with a tap at one end, for delivering known volumes of a liquid, especially in titrations. Chemistry Laboratory Stand 50cm with 2 Retort Rings Flask Clamp Rod Chemistry Physics Lab Equipment, Chemistry Laboratory Stand,Lab Stand with Clamp,Burette Clamp,Burette. of drops equivalent to 13. Apex Labs Burette / Retort Stand With Clamps (Mettalic) , Adjustable Base 7" x 5" x 24 " Supiror Quality Buret at best prices with FREE shipping & cash on delivery. Get easy accuracy when measuring liquids! Shop a variety of standard and digital Burettes (Burets) in Class A and Class B glass as well as acrylic, titrator, and self-zeroing. 01 mL. Lab setup - acid-base redox titration with pink phenolphthalein indicator. Place the waste beaker under the tip of the buret. View full-text Discover. 1 ml ceramic graduations; Tolerance ±0. 48 - $15. burette 10ml. Find Pipettes Burette stock images in HD and millions of other royalty-free stock photos, 3D objects, illustrations and vectors in the Shutterstock collection. Touch the tip of the buret to the inside of the vessel to remove the suspended droplet. 85. Verified Purchase Early Reviewer Rewards. In a titration of an acid and base solution, the burette can be filled with acid. 1 ml. 80. 1) Molarity = Moles of Acetic Acid Volume of Vinegar (in L) or as a mass percent. 00 Easy Order 60% OFF QC tested Warranty Certified and Verified - Burette Glass Borosilicate 10ml / 25ml / 50ml / 100mlM/S Microlit. at a time while swirling the flask until the indicator changes colour. Volumetric flasks, also called graduated flasks or measuring flasks, are items of laboratory glassware or plasticware calibrated and labelled to contain a specified volume of reagents, solvents, or other liquids. Burets are commonly constructed of a long tube of glass calibrated and marked in units of mL. Traditionally, the standard solution is filled in the burette. The following table shows the results from a titration in which sulfuric acid of concentration (0. Find here Laboratory Burette, Lab Burette manufacturers, suppliers & exporters in India. 125 USD / Pieces Minimum Order: 100000 Piece/Pieces Port. This allows us to relate the quantity of one unknown reactant. quantity Ages 11+ In Stock & Ready to Ship Need it fast? See delivery. View All 7. Fabricated by making use of quality-tesBurette Borosilicate Glass 50 ML Burette Borosilicate Glass We are highly appreciated for offering our clients with the best Glass Burette. 5/ Piece. What is burette stand in chemistry? burette, also spelled buret, laboratory apparatus used in quantitative chemical analysis to measure the volume of a liquid or a gas. By means of a rubber tubing arrangement, the gas to be analyzed is drawn into the burette and flushed through several times. , 0. Starting at $219. Ideal for general chemistry, wastewater treatment applications, food/beverage. suppliers at best prices! Ask details. The stopcock is used to control the flow of the liquid, allowing it to be dispensed drop by drop or in. He stops the addition of base from the burette. volume 25 mL, accuracy: ±0. Economy choice burets are inexpensive burets that have durable silk-screened graduations. Burette Solution, Gas Analysis Chemcials: Boiling Point >100°C (>212°F) CAS: 7664-93-9, 497-19-8: Solubility Information: Water: Completely Soluble: Vapor Pressure: Less than. Burettes can be specified according to their volume, resolution, and accuracy of dispensing. Yagi Studio / Getty Images. 50 Volume KMnOBrush Burette Ask Price. We will use these values in this class, but upper level courses may have more precise equipment. Jaws can be rotated and locked at any angle. A burette, or buret, from Grainger can be used to help measure and dispense exact amounts of liquids including chemical solutions. Class A volumetric glassware has a lower tolerance than Class B; for class A,. Piston burettes may be manually operated or may be motorized. BrandTech™ BRAND™ Titrette™ Digital Bottle-top Burets are suitable for most titrants in concentrations up to 1 mol/L. To clean the buret, use the following procedure: Rinse with distilled water: With the stopcock closed, add some distilled water to the buret. Find glass, PTFE and acrylic burettes at Grainger in a range of sizes and tolerances. 1mL Blue Graduations - Glass Stopcock - Borosilicate Glass Buret - Eisco Labs $39. Fabricated by making use of quality-tesAvogadro's number, N0, is defined as the number of atoms in exactly 12 g of isotopically pure C12. We also sell alcohol lamps that fit these stands. TOPTION Chemistry Laboratory dTrite Digital Burette 0. Fabricated by making use of quality-tesHint: “The least count in the burette is defined as the smallest unit that is marked on the burette equipment. Best Sellers in Lab Automatic Burettes. 99 $ 39 . Rods will not fade or wear with everyday use of clamps. Burette Borosilicate Glass 50 ML Burette Borosilicate Glass We are highly appreciated for offering our clients with the best Glass Burette. ₹999. Double Burette Clamp Support with Rod - Fits Burettes Up to 100ml - Stainless Steel Rod, Alloy Jaws, Built In Boss Head - Eisco Labs. Contact Supplier Request a quote . ₹ 190/ Piece Get Latest Price. Bore measures 7mm in. Save money. 3mL INDICATORS •An indicator is used during acid–base titration to identify the equivalence point of the reaction. We will use these numbers - 50 mL burette, 0. 5 kg. A burette functions as a tool for measuring both liquids and. 05 mL, while 25 mL and 50 mL burettes are usually graduated each 0. 1 Experiment 1Record these measurements on your report form. The volume of a digital buret is display on a digital display, eliminating meniscus reading errors. Chemistry Lab. What is class A burette? $176. DURAN 24 329 27 Burette, with Straight Standard Ground Stopcock and with Glass Key, 10 ml Capacity. (Burettes is a device used in analytical chemistry for the dispensing of variable, measured amounts of a chemical solution. The common word used for this purpose is called Least Count”. discription: fisher clamp for two burettes, made of mild steel sheet, with mild steel dai pressed boss head to hold upto 16mm dia rod. Fabricated by making use of quality-tesWhat is burette stand in chemistry? burette, also spelled buret, laboratory apparatus used in quantitative chemical analysis to measure the volume of a liquid or a gas. Min Order: 100. Get Quote. Each burette has a +30s waiting time before final reading can be taken. in 1% subdivisions, this borosilicate glass buret is used to determine the degree of dissociation of ammonia during the nitriding of steel alloys. View Price and Availability. 00. 7. Products are as shown in. BURKLE 9695-1025 Burkle 9695-1025 Titrating Automatic Burette (Burette), Borosilicate Glass; 25 ml. 3 glass. Adjust by hand with large flat wing head screws. Beakers. It is a long, graduated glass tube with a rubber tubing connection at its lower end. Thousands of new, high-quality pictures added every day. The volume measurements are marked such that 0. 936-727-5038. Apex Labs Burette / Retort Stand With Clamps (Mettalic) , Adjustable Base 7" x 5" x 24 " Supiror Quality Buret at best prices with FREE shipping & cash on delivery. 9. Calibrated to deliver. FREE Returns . Fabricated by making use of quality-tesA screw is important for holding two things together or connecting them. 10 4. 16 – $191. Delivery fee is not included. 2"/2. A base burette is used to dispense an alkaline liquid into a solution providing an excess of hydroxide (OH). Concave/ Convex Mirror except FL 5cm KSh 180. 10) (1. Hello, I am trying to make at home for personal and educational purposes and automatic buret (see photo) with arduino for acid/base titration. 46 / Piece. English; Help. Delivery fee is not included. We supply educational scientific laboratory instruments lab supplies and equipment used in Schools, Universities, Colleges, Home Schools and Labs. We supply major laboratory equipment, all chemistry lab apparatus, chemicals raw materials, laboratory reagents, laboratory consumables and basic lab equipment. 5"). Borosilicate glass with PTFE key stopcock. Try to get the meniscus to reach the 0. Our primary specialization lies in the area of Educational Equipments and Instrumentation for Primary & Secondary Schools, Polytechnics, College / University Level Laboratories for Physics, Chemistry, Biology. burette clamps, support stands, and attachments for chemistry and. Glass beaker. Shop now at Fisher Scientific for all of your scientific needs. jankidesaii. 30 Day Replacement Guarantee. The burette tube carries graduated marks from which the dispensed volume of the liquid can be determined. Price: $19. Inner diameter of a burette must be equal in its whole length, because the accuracy of volume measurement depends upon that. 95 Add to Cart Quick View 25 ml Burette, PTFE Stopcock, acrylic $18. Share images of burette stand drawing by website lsk. Although we can't match every price reported, we'll use your feedback to ensure that our prices remain. 0mL will be equal to: $13mL = 20 imes 13 = 260drops$. Therefore, when the liquid level in a buret is read, it is read and recorded to the nearest 0. The ±0. 1-4 It is also called volumetric analysis, as the measurement of volumes is critical in titration. Fabricated by making use of quality-tesBurette Borosilicate Glass 50 ML Burette Borosilicate Glass We are highly appreciated for offering our clients with the best Glass Burette. 6 yrs CN Supplier. price $ 20. 050 mL volume, 0. Burette measures 57. As much accuracy as your balance can give you, but a pain in the neck to do. Preview. 82 inc VAT. In stock. • Record the final burette reading. The color of stopcock may vary. Be sure the liquid in the buret drains down the walls of the column without sticking to the sides and forming droplets. In stock. Burette, 50mL - Class B - with PTFE Stopcock - Blue Graduations. Buret is 100mL and reads the amount of ammonia absorbed. 8"):. A burette is a volumetric measuring glassware which is used in analytical chemistry for the accurate dispensing of a liquid, especially of one of the reagents in a titration. 1 ml divisions. #2. com: Thames & Kosmos Chem C1000 Chemistry Set | Science Kit with 125 Experiments | 80 Page Lab Manual | Student Laboratory Quality Instruments & Chemicals. The basic set-up of a titration usually includes the following: A buret containing a titrant of a known concentration; A flask containing an analyte of unknown concentration or quantity; For any titration the titrant and analyte must react both quickly and to completion. $1. burette meaning: 1. 95. 4. Country of Origin: Made in India. Live Class - Lecture 1 on Experimental Chemistry, burette, pipette, cylinder, flasksFor more Video Lectures for O Levels, A Levels, IB Diploma, AP Courses &. 2 ml, Grade A with PTFE Key Stopcock. What are the advantages of using a burette?A buret is a device used to deliver controlled more precise amounts of a liquid than a graduated cylinder. Price may vary by color. The buret used in the General Chemistry lab has a 50-mL volume and a Teflon stopcock requiring no lubrication. Step 4. 00 mL). They come in a variety of sizes and are used for measuring volumes of liquid. Pyrex - 3454234 2094-1L 2094 Large Volume Class B Glass Burette, 1000 mL; 1/Cs. 14 $ 20. eisco Glass Burette (Class B) - 50ml. ASTM, Class A, tolerance, ±0. have your eyes level with the meniscus. Fabricated by making use of quality-tesQuestion: When taking a buret reading you should: (more than one answer may be correct) have your eyes level with the stopcock. Chemical Kinetics - Summary General Chemistry Ii. Rinse the burette and glassware with the titrant a few times to prevent contamination. Buy Apex Labs Burette / Retort Stand With Clamps (Mettalic) , Adjustable Base 7" x 5" x 24 " Supiror Quality Buret for Rs. Burette Borosilicate Glass 50 ML Burette Borosilicate Glass We are highly appreciated for offering our clients with the best Glass Burette. 73 mL Final burette reading - 25. powder coated. •Burette – apparatus into which the unknown solution is placed. Toggle menu. Please call us at. Burette, 100mL - Class A, DIN ISO 385. Burette body measures 0. 00 Easy Order 60% OFF QC tested Warranty Certified and Verified Seller Burette Price Burette Price Material Glass. Cancel. Burette (Volumetric burette, buret) is a volumetric measuring laboratory glassware which is used in. Please consider supporting the channel on Patreon!video demonstrates how to use a buret in the chemistry lab. The List Price is the suggested retail price of a new product as provided by a manufacturer, supplier, or seller. Burette definition: a graduated glass tube with a stopcock on one end for dispensing and transferring known. Reviewed in the United States on April 10, 2019. Burette (Volumetric burette, buret) is a volumetric measuring laboratory glassware which is used in analytical chemistry for accurate dispensing of variable, and for measuring the volume of a liquid, especially of one of the reagents in a titration. The burette is washed. Additionally included with interface: 2 m interface cable (Sub. Burette, 50mL - Class B - with PTFE Stopcock - Blue Graduations. 01 mL. The stopcock valve is used to control the flow of liquid from the burette in either a steady stream or drop-by-drop. Shop glass & rubber tubing for chemistry experiments. Laboratory Glassware Burettes. The clamps are intended to be attached to either 5/16" or ½" rod diameter support stands. com. A screw is a tool that can hold two things together without glue. Ariel Skelley, Getty Images graduated cylinder pipet or. 24. Related Products: Flask Stand. The stopcock valve is used to control the flow of liquid from the burette in either a steady stream or drop-by-drop. On the other hand, a pipette is a laboratory tool commonly used in chemistry, biology, and medicine to transport a measured volume of liquid, often as a media dispenser. If that doesn't work, two other methods can be used.