Furthermore, such a three way bears the weight of gas tubing without “sinking” with the attached cannula. Subdivisions: 0. For activity 3, the buret is filled with a base solution and the stopcock is partially open to slowly add base to the acid while swirling the flask. . Automatic Titration. 7. Procedure: 1. Remove the plunger from the titrator and place it back in your lab kit. Stopcocks. Unit 7 Lab: Water Hardness CHEM 1806 Purpose: To determine the hardness of your drinking water and the technique of titration Materials: Student Supplied –distilled water, tap water, books or other height riser LabPaq materials: 100mL glass beaker, toothpicks, 25 mL Graduated cylinder, test tube clamp holder, 10mL syringe titrator, syringe stopcock, Determination of water harness bag. First, the O-ring is designed to prevent the stopcock from falling out if it becomes dislodged. The barbed fitting end accepts 6. T-Bore found in: Stopcock, High Pressure, T-Bore, Funnel-Reservoir, Rate Measuring with PTFE Plug, T Bore, Stopcock, Three-Way, T-Bore, SYNTHWARE Glass T. 16 / Piece. Main point ring graduation. Titrator and small stopcock. Edges Medicare Private Limited. A burette is used to measure the volume of a liquid. 95 |. Water Hardness Titration. SERVING SCIENCE SUCCESSFULLY SINCE 1957 . FORTUNA ® Optima glass syringes with interchangeable components. 7680; for retaining clips, see No. Favorite item to keep tabs on it! Saved!Mettler Toledo™. Key Features Meet ASTM E-287 Class A specifications Made from precision, uniform Schott DURAN true-bore tubing Capacity of 10 mL to 100 mL available Includes PTFE stopcock and 2mm stopcock bore plug. The buret’s small. During titration, a stopcock is used to release one drop at a time from the titrator. com carries a full line of Lab Glassware. It is used for syringe changing the liquid. • Made from nickel plated brass. Later in the case, blood was administered during an episode of hypotension and a 20ml syringe was connected to this stopcock to act as a pump, allowing the periodic aspiration and injection of blood. 13. 3-2 Confirming catheter tip position fluoroscopically, open the stopcock of the extension line to begin aspiration. 2 Standard Taper stopcocks and strong, hollow No. The higher the. Also used as a replacement stopcock for the Poor Man's Burets and the Economy Choice Burets. Lp1 review. Titrator i. 2 DWK Life Sciences Kimble™ Kontes™ FlexColumn™ Three-way Luer Stopcock Could I please help in calculating the results in data table 2. Megan Brashear, CVT, VTS (ECC), uses water and food coloring. Gather the test tube holder, small stopcock, 10 mL syringe (titrator), and either 2 thick textbooks and the lab kit box or 5-6 thick textbooks. Large wings. 51107525. Remove the dropper and lid, and use a clean pipette to. The device has been used for a traditional acid–base titration experiment and produced. Needles & Syringes to Protective Apparel. Burets are used to deliver precise amounts of a. View All Special Offers and Programs. USING THE PATIENT LINE STOPCOCK . $1899 ($3. The Stopcock is Sterile. Comments. D. Fancy a chat? You can contact us on. Repeat this step so the syringe receives a total of two rinses. 3-Way Stopcock with Handle in OFF Position, Fixed Male Luer Lock, Female Fitting, 200 PSI. Procedure I gather the test tube holder small stopcock 10 mL syringe and some from CHE 112L at Northern Kentucky University Set up a 10 mL syringe and the drop counter so that liquid will flow through from the syringe, through the sensor on the drop counter, and into a clean beaker as shown. Titration. [email protected] to 9. The cost depends on what tier of titrator you are looking to purchase, as well as any connectivity/add-ons. 2 M NaOH solution from your buret into your beaker. textbooks and the STEMpaq box or 5-6 thick textbooks. General Chemistry 1 Lab Kit (Hands on Labs). Contact Now. However, If you don’t know where your stopcock is, you’ve got a problem! This article will tell you all. Double Buret Clamp holds any size buret from micro to 100mL capacity. 2. 42-0139-00-02-EXP, Antacid Analysis and Titration (1) experiment step by step. In titration, a known volume of one solution (the titrant) is slowly added to another solution (the analyte) until the desired endpoint is reached. release one drop at a time from the titrator. Attach an empty 10 mL syringe at the 6 o’clock position 2. 1. Gilde opleidingen lipdub. Make sure that the stopcock on the syringe is in the closed position (horizontal). Remove the plunger from the titrator and place it back in your LabPaq box. )Glass burette with either 10 mL titration volume and 0. See Figure 6. Perform a rinse procedure by activating a manual dispense function on the titrator. A small hole in the filling tube at the "O" line permits setting of the liquid level and excess titrant is returned to…. On a liquid burette, the stopcock is at the bottom, and the precise volume of the liquid dispensed can be determined by reading the graduations marked on. A titration apparatus was then setup using a ring stand, ring clamp, syringe, stopcock, and funnel. Occasionally, this device is referred to as a manual flow regulator or simply as an IV flow regulator. Attach the stopcock to the tip of the titrator by placing the larger, clear, plastic end of the stopcock into the tip of the. These wholesale stopcocks feature unique low-torque handles that are easy to grip and turn, as well as extended female luer connections to enhance clarity and reduce visual interference from the handles. NOTE 6Replace the generator solution when it becomes yellow and a stable reading cannot be obtained. Stopcock for Syringes and Economy Burets. SmartSite™ Syringe-to-Syringe Trasnfer Device. Qosina is a leading supplier of 1-Way Stopcock, Female Luer Lock, Male Luer Lock with 200 psi. The pulse-free, dispensing operation of the Continuous burettes makes titration safer at high-level precision. Order number: 5 497 050. Procedure Gather the test tube holder, small stopcock, 10-mL syringe (titrator), and either 2 thick textbooks and the lab kit box or 5-6 thick textbooks. 3. Then read the exact volume on the buret, enter this value into the MicroLab software. FREE delivery Thu, Nov 2 on $35 of items shipped by Amazon. Operation of PCA pumps by nursing staff or family members may cause excessive sedation of the patient by overriding theOpen the stopcock and add 1 drop of (EDTA 0. Administer via fast IV push (can be through a running IV line). 741 Words; 3 Pages. 0 mL mark. Find the stopcock and shut it off immediately to prevent flooding. NOTE 2—Two good references on pyridine-free reagents are the Hydranal® Manual-Eugen Schotz Reagents for Karl Fischer Titration, 6. 3. Example of how to connect the syringe, stopcock, extension set, and catheter to prepare for any type of body centesis. Catalog No. 09 – R 501. Technical Details. Remove the plunger from the titrator and place it back in your lab kit. Titrator and small stopcock. Titration Stand found in: G20S Compact Titrator, TITRONIC® 500 Manual. Manual controller for the control of dosing and titration tasks. We will need to gather the test tube holder, small stopcock, 10-mL syringe (titrator), and either 2 thick textbooks and the lab kit or 5-6 thick textbooks . 0 mL mark. Burette with straight stopcock, 50 ml Graduation 0. Return the 20 mL of the rinsed sodium hydroxide to the 250 mL beaker. Seal the bottles immediately after. 15 Use the graduated cylinder to measure 5. Burettes deliver a chemical solution with a known concentration into a flask. Remove the plunger from the titrator and place it back in your LabPaq box. In addition, she says, “Making sure that. Gather the test tube holder, small stopcock, 10-mL syringe (titrator), and 2 thick textbooks and the LabPaq box or 5-6 thick textbooks. Manufacturer Part No:. 3-WAY. Take the white cap off the syringe and screw the syringe on to the stopcock. Return the 20 mL of the rinsed sodium hydroxide to the 250 mL beaker. add NaOH to the titrator. d. Attach the stopcock to the tip of the titrator by placing the larger, clear, plastic end of theHOL Supplied Materials: Quantity Item Description 1 Beaker, 100 mL 1 Graduated cylinder, 25 mL 1 Pair of safety goggles 1 Pair of safety gloves 1 Syringe titrator, 10 mL 1 Syringe titrator, stopcock 1 Test Tube Clamp holder 1 Experiment Bag: Titration for Acetic Acid in Vinegar 1 – Phenolphthalien Solution, 1%, 0. If SVT is not terminated and normal sinus rhythm maintained within 1 – 2 minutes. The most common method for delivering titrant is a buret (Figure 9. 2 Place the red cabbage on the cutting board. They come in. acetone after cleaning, then dried in an oven at 100°C for at least 1 h and 9. Titrator. Note: Please read all steps and safety information before starting the procedure. $999 ($5. Volumetry has the advantages that solid or pasty samples can be introduced directly into the titration vessel. With state-of-the-art performance features, like a fritless cell option, the AQ-300 offers the same fast and accurate results you've come to expect from other Aquacounter® products. Since HCl is added in the reaction mixture which will lead to the f. 1 mL gradations. The volume of titrant used during a titration will always be the exact same throughout three trials. Provided with a hexagonal base flat ground for stability and a SAFE-GARD bumper on sizes 25 mL and larger. Updated June 2021 Welcome to Science Interactive | | We're so glad you'’re here At ScienceStopcocks. Extension Questions 8. Titrations from 0. View Documents. A volumetric burette delivers measured volumes of liquid. View Formal lab report_ Titration for Acetic Acid in Vinegar. Each burette is supplied with a dust cover, and all sizes are furnished with a 2-mm bore stopcock plug. D) The analyte solution is being stirred too quickly. Head has sufficient storage space to allow solvent removal by syringe or drainage through 2mm T-bore PTFE (Polytetrafluorethylene) stopcock. The stopcock is closed at the point where the indicator changes color, indicating the endpoint. The borosilicate glass buret is filled by pressure through a tube extending from the bottle up inside the graduated tube. Disposable Syringe Infusion Set Urine Bag manufacturer / supplier in China, offering Sunton 3 Way Stopcock China Stopcock Manufacturers OEM Surgical 3 Way Plastic Stopcock with Extension Tube, Sunton Medical Extension Connector China Breathing Circuit Tube Manufacturing Disposable Surgical Extension Tube with Three-Way Stopcock, Sunton. Titration is a type of quantitative analysis and the most common forms are acid-base, precipitation, complexometric, and redox titrations. The total capsid titer stands for the amount of all fully assembled viral capsids, including full and empty AAV2 capsids. Set up the titrator. 32. Cadence Science® stopcocks are precision-machined, individually lapped, and carefully mated to maintain pressure characteristics. 01 Total volume of NaOH used (mL) 8. Additional studies highlight fluid flow dynamics associated with. Using a small funnel, pour a few cubic centimetres of 0. Unit 7 Lab: Water Hardness CHEM 1806Purpose: To determine the hardness of your drinking water and the technique of titration Materials: Student Supplied –distilled water, tap water, books or other height riser LabPaq materials: 100mL glass beaker, toothpicks, 25 mL Graduated cylinder, test tube clamp holder, 10mL syringe titrator, syringe stopcock, Determination of water harness bag. Enhance your lab’s accuracy with YSI TITRONIC® 300 Manual Titrator. Discard the solution and replace with fresh titration solution if a stable reading cannot be obtained. Favourites £ 0. Procedure 1 Gather the test tube holder, small stopcock, 10-ml syringe (titrator), and 2 thick textbooks and the lab kit box or 5-6 thick textbooks. The working principle. 15 and 20 Burets provide 7 inches clearance for titration vessel and 2001G50 Buret provides 8 7/8 inch clearance 2001F10. Cap and septum included. The flask will contain the air that you will be measuring the pressure of. Place a clean dry 10 mL graduated cylinder under the tip of the syringe. Two-tenths of a pound of air at 2 atm and 540°R is trapped within a syringe by a plunger at one end and a stopcock at the other, as shown in the figure. They come in handy when dispensing and measuring liquids (sometimes gas) with accuracy. Glass and metall syringe, capacity 10ml:0,5ml, Luer tip, autoclavable at 134°C and interchangeable glass cylinder with steel piston and conformity. Used to dispense and measure a variable amount of a chemical solution in analytical chemistry at the same time, burettes feature a long, graduated glass tube with a stopcock on its lower end for liquid measurement. A magnetic stirrer is included in the package which connects to the TFT display module via USB, providing excellent mixing during the titration. Fill the syringe to the point where the bottom of the meniscus touches the 20. These stopcocks are easily integrated with other stopcocks, manifolds, adapters, tubing, needles, and glass syringes. 50/CS. When you are comfortable using the titrator, pour the water in the beaker down the drain, remove the titrator from the test tube clamp, and remove the. 3. Figure 5. Remove the dressing and clean around the tube with sterile saline using a cotton ball or Q-tip. The TitroLine® 7500 KF is a compact, easy-to-use volumetric titrator for water determination according to Karl Fischer (KF) with a typical operating range of 0. 04 with Subscribe & Save discount. 3. tubing. syringe are not volumetrically precise and cannot be used to accurately measure the amount of liquid delivered. 14. In this method, we connected two no-return valves (JMS, Hiroshima, Japan) to both sides of a three-way stopcock (JMS) ( Fig. The only consistent attribute is that the valve is designed to completely stop the flow when closed fully. Figure 4. Figure 6. … 1068 Words; 5 Pages; Better Essays. Satisfactory Essays. A syringe should always be selected that is at least twice the volume of the desired quantity of organolithium reagent 32. Place a clean dry 10 mL graduated cylinder under the tip of the syringe. 1 Dry the sample bottles and caps overnight in an oven. Stopcocks. 1,051. Stopcock connects to and forms a tight seal with Luer Lock syringes. Automatic burette, Silberbrand, class B. ₹999. Then look no further than the Aquacounter® AQ-300 coulometric Karl Fischer titrator. 0 mL of vinegar. syringe pump; the purpose of utilizing PCA is to provide a method of patient controlled delivery of an opioid which maintains optimal analgesia while minimizing sedation. Dimensions: 36 mm o. Hamilton ® syringe, 1000 series GASTIGHT ®, LTN (fixed needle). Your 5-year-old patient is being mechanically ventilated with a VT of 150 mL, rate of 20/min, and I:E ratio of 1:2. 2. 39 8. tubing. Discard the solution and replace 10. These 30mL PYREX® pear-shaped separatory funnels have glass No. Compare Product No. Figure 4. Dry with a clean towel. 01911107. Class A, ASTM E-284, meets USP standards, individually serialized and certified. Allow this excess solution to drain into a waste flask. Stock Allocated QTY : / Remaining QTY : / Allocation Reset Date : DYNJSC1HPNF. Calibrated to deliver (TD, EX). Includes Schellbach backing for easy reading of liquid levels. 1 mL Delivery end fitted into plastic push-button stopcock permitting drop-by-drop delivery Small screw clamp presets drop speed for repeat titration Polyethylene filling tube extends from buret top. Out of Stock. Then add the standard solution drop by drop, until the color change. 13. With a ball valve, stopcocks control the flow of liquids and low pressure gases in delivery systems. 1 mlExpert Answer. 00. Stopcocks are also offered in a manifold design, aBurettes. 3. A buret is a cylinder similar to a syringe, with measurement markings and a stopcock on the bottom. Place the paper towel with the NaOH drops into the trash and reposition the clean, dry 100mL beaker back in the titration setup, under. Log in Join. Rinse the graduated cylinder with a small amount of distilled water and add to the beaker containing the 5. 4 for the 5 pre-years assessed versus 35. Related Products: 5 Ml Buret. f E 1064. 7. See Figure 5. Piston burettes are similar to syringes, but with a precision bore and a plunger. gas flowing rapidly through the titration cell and out the stopcock 1 The abbreviations used are: cyt ~111, horse heart ferricyto- chrome c; kobs, observed first order rate constant. 2-way and 3-way Connections This polypropylene stopcock has a detachable, watertight and inert Teflon® PTFE plug that contacts any fluid being dispensed. Concentration of CH3COOH in Vinegar. In titration, the stopcock should be partially open for activity 3 and completely open for activity 4. 8 mm Injection Needles; Pack of 100 (1) Acid Titration Standard (Potassium hydrogen phthalate (KHP) (1) • Distilled water • 1 White paper • Toothpicks • Scissors • 1 Beaker, 100 mL, glass • 2 Beaker, 50 mL, plastic • 1 Cylinder-25-mL • 1 Syringe-Titrator-10mL • 1 Syringe-Titrator-Stopcock • 1 Test-tube-clamp-holder • Experiment Bag for Titration for Acetic Acid in Vinegar • 1 Phenolphthalein Solution, 1% - 0. Rinsing buret by rotating between fingers. Syringe access port (B) incorporates a 4mm PTFE stopcock with a 14/20 outer joint for use with CG-3022 septum stopper permitting repeated syringe punctures or changes of the septum without breaching the integrity of the solvent. Stopcocks work as valves, serving to regulate, interrupt or completely stop the flow of a gas or liquid through piping, tubing or a faucet, with tubes attached to the stopcock’s female joint easily separated or connected by a turn of the stopcock. Description Pricing; CAD6056: female Luer lock to female Luer lock, male Luer lock, in. 04: Patient end of EDS 3 tubing PROCEDURE 1. EXCHANGE transfusions through the umbilical vein may be performed in several ways. Doc Preview. The patented dual pristons pump provides permanent and pulse-free the liquid requested. - An accurate reading for the volume used is needed. Remove the plunger from the titrator and place it back in your lab kit. Fill the syringe to the point where the bottom of the meniscus touches the 20. Titration for Acetic Acid in Vinegar LabExperiment SummaryStudents will have the opportunity to use titration techniques to determinethe concentration of an acetic acid solution. Fill the syringe to the point where the bottom of the meniscus touches the 20. 01-911-105. Product Type: stopcocks ; Material: Nylon. 1 ml, Class B lateral glass tap with 3210175 PART NO. Information on pin assignment and status diagrams of the Eco KF Titrator remote interface. The syringe filled with donor blood is handed to the operator or his assistant who injects it. Once the tip of the burette is full of solution, close the tap and add more solution up to the zero mark. Gather the test tube holder, small stopcock, 10-mL syringe (titrator), and either 2 thick textbooks and the STEMpaq box or 5-6 thick textbooks. Nov 12, 2014. • Made from nickel plated brass or stainless steel. A titration apparatus was then setup using a ring stand, ring clamp, syringe, stopcock, and funnel. C. Product information . Use the beaker of water and a funnel to fill the buret about 1 mL above the “0” mark. The most. The main purpose of putting a 4-way in-line (two consecutive 3-way stopcocks) is for having a way of returning the waste in a blood draw without disconnecting the waste syringe. Remove the plunger from the titrator and place it back in your STEMpaq box. Expert Answer. (D) Transfer obtained via the classic metal device. 100+ bought in past month. Each for $284. False. Return the 20 mL of the rinsed sodium hydroxide to the 250 mL beaker. Procedure i gather the test tube holder small. 3, with detachable PTFE stopcock. Figure 4. T, ET Wide) Data Tabie 1: NOH Titration Volume Initial NWOH Volume ImL) Tr . Open the stopcock wide open to force trapped air bubbles from the stopcock and tip. Chemistry questions and answers. 04 with Subscribe & Save discount. All Photos (6) 3-way stopcock. Gather the test tube holder, small stopcock, 10 mL syringe (titrator), and either 2 thick textbooks and the lab kit box or 5-6 thick textbooks. Increases accuracy of titrations for measuring TA, SO2, and Alcohol by Volume. Twist the plunger to lock the syringe in the vacuum position. 0 atm and 540°R. If SVT termination failed, a second dose of adenosine (12 mg per 4 ml) in a 5 ml syringe was administered. With PTFE stopcock, quick to dismantle and easy to clean. . You'll get a detailed solution from a subject matter expert that helps you learn core concepts. Objectives To develop familiarity with the concepts and techniques of titration To determine the concentration of an acetic acid solution 117 ©Hands-On Labs, Inc. 9 Standard Taper glass stoppers. Figure 3 shows an image of the. 08 / Piece Min. 2 for the 6Gather the test tube holder, small stopcock, 10-mL syringe (titrator), and 2 thick textbooks and the LabPaq box or 5-6 thick textbooks. 72/10 Items) $18. A small hole in the filling tube at the "O" line permits setting of the liquid level and… DWK Life Sciences (Kimble) KIMAX buret with a PTFE plug. $1899 ($3. 2018/2019; Helpful? 0 3. Stopcocks (Per Pack 100), 3-Way Nylon Stopcocks with Clear PC Lock Rotating Ring or Tomopal Nylon Stopcock with Clear PC Lock Rotating Ring for Industrial and Laboratory uses. 9. A Luer type syringe can be connected to each end. Gather the test tube holder, small stopcock, 10-mL syringe (titrator), and 2 thick textbooks and the LabPaq box or 5-6 thick textbooks. Amber reservoir bottles block ultraviolet light, while borosilicate bottles are stronger than regular. The data showed an increase in overall CLABSI rates after the initiation of the stopcock. Min. 08. A 100 mL graduated cylinder was used to pour 20 mL of sodium hydroxide (NaOH) into a new 250 mL beaker. Electrochemistry. Chromatography Rf Values And Aerobic Metabolism. After the drop is added, gently swirl the beaker and observe the color for 5 seconds. ₹ 15 / Piece. Graduation in high-contrast blue enamel, acc. Attach the stopcock to the tip of the titrator by placing the larger, clear, plastic end of the stopcock into the tip of the. 60pcs Plastic Test Tubes with Rack and Caps, 16 x 100mm Clear Test Tubes with Holder for Scientific Experiments, Beads Liquid Spice Seed Storage, Party Decorations. Pressure rating…. 3 Way Stop Cock With Extension Line, For Hospital, Size: 10 cm. 필요한 정보를 선택하고 샘플 무게를 입력한 다음 시작 버튼을 누르면 됩니다. Testing and Filtration. Propofol is prepared in a lipid emulsion which gives it the characteristic milky white appearance. 1. Read More. Reading the buret carefully, record the exact volume added on your data sheet. Figure 7. j) Turn the patient line stopcock to the “Drainage Only” position (“off” – prong points toward stopcock). Create professional science figures in minutes with BioRender scientific illustration software. 20 1. Titration for Acetic Acid in Vinegar-Lab Report Exercise 1: Determining the Concentration of Acetic Acid Data Table 1. Turn on the Titrette ® and start the titration. Procedure Gather the test tube holder, small stopcock, 10-mL syringe (titrator), and either 2 thick. 7 cm). Fisher Scientific, Bishop Meadow Road, Loughborough, Leicestershire, LE11 5RG © Fisher Scientific UK Ltd All rights reserved. Three-way models allow connection of two or three arms. A) Conditioning the buret with titrant B) At the beginning of a titration C) Filling the buret with titrant D) Close to the calculated endpoint of a. … 1068 Words; 5 Pages; Better Essays. 4 amber, class B, without stopcock products available at low cost with Free Delivery available (Terms and Conditions apply) Your basket is empty. Unit 7 Lab: Water Hardness CHEM 1806Purpose: To determine the hardness of your drinking water and the technique of titration Materials: Student Supplied –distilled water, tap water, books or other height riser LabPaq materials: 100mL glass beaker, toothpicks, 25 mL Graduated cylinder, test tube clamp holder, 10mL syringe titrator, syringe stopcock,. “The best way to deal with any fluctuations in system performance or sample results is to make sure you are taking care of your titration system,” Carey says. Remove the plunger from the titrator and place it back in your LabPaq box. Sunton 3 Way IV China Manifold Way Stopcock Suppliers 3 Way IV Port Syringe Stopcock 3 Way Tube Connector Stopcock with Luer Lock Three Way Stop Cock, Find Details and Price about 3 Way Stopcock Medical Stopcock from Sunton 3 Way IV China Manifold Way Stopcock Suppliers 3 Way IV Port Syringe Stopcock 3 Way Tube. 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. Products. Products Building Blocks Explorer Genes Papers Technical Documents Site Content Chromatograms. 17 Cut off the tip of the pipet with scissors and add 2 drops of phenolphthalein to the 5 mL. 1. If the tip of the syringe, "The Titrator", was not filled with NaOH. Corning. The major advantage to this approach is that it obviates the need for any syringe switching or stopcock swiveling. Test Tubes with Rack, YGDZ 50pcs 16x100mm Clear Plastic Test Tubes with Caps and Holder Rack for Nurse Party Decorations Halloween Party Favors. Step Action Grasp the pipette's rotating assembly. Question: Exercise 1: Determining the Concentration of Acetic Acid Data Table 1. 2022-08-31. PCTFE/PTFE flat stopcock, FEP tubing connection, anti-diffusion buret tip and standard amber glass reagent bottle. Mettler Toledo ™ Piston For Titration Sensor I. Purpose: To become familiar with the concept of water hardness, practice a titration technique using a titrator, and determine the hardness of the local water supply. tion cell Question: Procedure Gather the test tube holder, small stopcock, 10-mL syringe (titrator), and either 2 thick textbooks and the lab kit or 5-6 thick textbooks. tubing. Stopcocks Narrow Results 1 – 30of42 Results 1 Thermo Scientific™ Nalgene™ Three-way Stopcock Experience in-house fluid transfer system flexibility with this three-way. A gray intermediate color may develop. Figure 4. A stopcock for use with a syringe, the stopcock comprising: a stopcock body including: a central axial opening formed in the stopcock body; a first stopcock luer connector extending radially from the stopcock body and in fluid communication with the central axial opening; and a second stopcock luer connector. It consists of a graduated glass tube with a stopcock (turning plug, or spigot) at one end.