A beaker is a cylindrical glass vessel used for holding liquids, storage, mixing, and transferring various solutions. The glass beaker is a multipurpose piece that is widely used in the laboratory to carry out a chemical reaction, measure liquids, heat the solutions or liquids over a Bunsen burners flame or to collect them in a titration experiment. Uniform wall thickness of our beakers makes them ideal for heating applications with easy-to-read scale and large labeling field for easy marking. Increased glass content strengthens the beakers with great mechanical stability. The reinforced rim increases shock resistance and reduces the risk of breakage.
Volumetric flasks are employed to measure precise volumes of liquids to make standard solutions or weigh for density calibrations. The volumetric flasks aid in quantitative laboratory work. Made of low expansion coefficient and chemically resistant borosilicate; our volumetric flask is an optimum combination of resistance and readability. Volumetric flasks can be capped to prevent material in the flask from evaporating as well as to maintain the material’s purity.
The proper procedure of filling and using the volumetric flask is as follows:
- Transfer the liquid to be measured into the flask with the help of a pipette The instrument used for liquid transfer should supply a steady stream against the wall, about a centimeter above the calibration line. One should not splash the liquid. The tip of the pipette or a burette may touch the wall of the flask.
- After reaching the level below the calibration line, cap the container and let the liquid drain from the walls of the flask.
- Fill the flask as required. If the calibration line is crossed, a pasture pipette can be used to draw out the excess fluid. Make sure that the surface tension in the tip of the pipette is sufficient to draw out the fluid. Once completed, cap the flask.
Method for the gravimetric purpose:
- Properly clean and dry the flask.
- Using the physical balance weigh the flask, its cap, and any other materials that may interfere with the final weighing.
- Note the liquid’s temperature and the room’s barometric pressure and humidity, if accurate readings are required.
- Carefully transfer the liquid to be measured into the flask using a pipette or a burette.
- When the level is just below the calibration line, put the cap on the container and let the liquid drain from the walls of the container.
- Weigh the filled flask.
- If Step 3 was performed, repeat it to verify the readings.
- Deduct the empty flask weight from the filled flask weight.
Method for making a definite solution:
- Properly clean the flask and dry it.
- Transfer the pre-calculated concentrated liquid into the flask using a pipette or a burette. Do not splash.
- Add distilled water to the flask up to the calibration line using a pipette, a burette, or any other device that can supply a steady stream against the wall about a centimeter above the calibration line trying to rinse any of the concentrated liquid remaining on the flask’s neck. Cap the container after reaching up to the calibration line and let the liquid drain from the walls of the container.
- Complete the filling process using step 3 again. Try not to cross the calibration line because any excess liquid may dilute the required concentration.
To empty the volumetric flask, follow the following procedure:
Incline the flask slowly to provide a steady stream of liquid from the spout. Continue inclining until the flask is vertical and hold it for half a minute to empty the flask fully. Wipe the drop at the tip of the flask with the wall of the receiving container. Make sure not to remove the flask in a vertical position.
The Glass bottles provide the handlers with an extraordinary mechanical strength which prevents them from breaking and cracking. They offer a vast and diverse range of applications. The bottles improve handling, sample identification, and ease of use. Also, the bottles and accessories help to make laboratory work more comfortable, safer, and more economical. We provide a diverse range of laboratory bottles to enable the experimenters to perform various research manipulations in them. The glass bottle range includes:
- Wide mouth polycarbonate bottle
- PETG media bottle
- Polycarbonate storage bottle (round and square)
The bottles are provided with reusable screw caps. The grooves and ridges on the screw caps are optimized to provide the user with more efficient and more comfortable tightening or removal, especially with gloved hands. The optimized cap sealing system ensures a liquid-tight seal. The bottles are marked with highly durable white ceramic. White markings on the bottles improve visibility and volume reading even for darker solutions.
A graduated cylinder is a relatively narrow glass cylinder, manufactured from chemically resistant borosilicate glass, explicitly used for measuring a liquid’s volume. Generally graduated cylinders are not used for high-quality volumetric work. The tolerance and resistance of graduated cylinders are considerably higher than that of the volumetric flasks. Our graduated cylinders provide increased mechanical strength to avoid breakage and cracking. Measurements on the graduated cylinders are taken by viewing the lower meniscus at the eye-level (the lowest point of the convex dip in the cylinder).
To fill a graduated cylinder following protocol should be followed:
- Clean and dry the cylinder before filling.
- Transfer the liquid to be measured into the cylinder with the help of a pipette, burette, or any other laboratory instrument in a steady stream. Do not splash.
- Stop filling when the calibration line is achieved for a few minutes and let the liquid drain from the walls of the container.
- Draw out the excess fluid by using a pipette if the calibration line is crossed. While pipetting out the excess liquid, make sure that the surface tension in the tip of the pipette is sufficient.
- Cover the cylinder to prevent evaporation or contamination.
To empty a filled graduated cylinder follow the following protocol:
- Incline the cylinder gradually to pour out a steady stream of liquid of the spout. Do not splash.
- Keep inclining until the cylinder is vertical and hold it for about half a minute.
- To empty the cylinder touch the drop at the tip of the spout to the wall of the receiving container.
- Do not remove the cylinder vertically.
A pipette is a volumetric instrument used to transfer small amounts of liquid. The liquid to be transferred is drawn into one end of a glass cylinder by squeezing the rubber ball at the opposite end or by sucking. The glass pipette is marked with white ceramic to allow the accurate transfer of the required volume.
Types of Pipettes
There are three types of volumetric pipettes: volumetric transfer, measuring, and serological. Because of volume gradations, the serological pipettes can dispense varying volume of liquids. While using the serological pipette, do not include the tip region in the volume measurements. These pipettes are graduated with white ceramic along their sides. Do not drain or blow out the measuring pipettes when delivering a solution because the extra volume in the tip is not part of the pipette’s calculated volume. The volumetric pipettes are designed to dispense one specified volume of liquid, whereas the measuring pipette is calibrated to dispense different volumes. Unlike the serological pipette, both of these pipettes are designed to include the tip region in their entire dispensed volumes.
To fill a measuring or serological pipette follow the following method:
- Draw the solution to be transferred just above the volumetric level, then let the solution fall to the calibration mark.
- Remove the pipette from where the fluid is drawn, and wipe the tip with a laboratory tissue to remove any excess solution drops from the outside of the pipette.
- When dispensing the fluid from a measuring pipette, let the tip touch the side of the receiving container and let the fluid flow. If one is dispensing the liquid by hand, control the flow rate by placing the thumb on the end of the pipette. However, never let the thumb wander away from the end of the pipette because it will let the fluid flow uncontrollably.
- Thoroughly drain the solution from the pipette.
- Do not remove the tip with an upward or downward motion.