Volumetric Flask

A volumetric flask is a piece of laboratory equipment commonly used in scientific experiments, especially in chemistry, biology, and analytical studies to measure and hold a precise volume of liquid. They are also often referred to as standard flask or measuring flasks.

It is a pear-shaped piece of instrument with a long, narrow neck and flat-bottomed. On the neck, there is a line etched, known as the calibration mark. his mark indicates the exact volume the flask can hold when filled to that level, making it an essential tool for preparing solutions with precise concentrations. When a liquid is filled up to this mark, it indicates that the volumetric flask contains an exact volume, such as 100 milliliters (mL), 250 mL, or 1 liter (L)..

Omsons Glassware Manufacturing Standards

Omsons Glassware Pvt Ltd is a trusted manufacturer of high-quality laboratory glassware, following strict standards like DIN, ISO, USP, ASTM, and IS. We uses DIN ISO 3585 certified borosilicate glass, ensuring its products are strong, heat-resistant, and chemical-resistant. By meeting USP standards, Omsons glassware guarantees that its glassware is safe and precise for pharmaceutical and scientific use.

Volumetric Flask's Classes

Volumetric flasks are manufactured in two classes – Class A and Class B.

Class A – Class A calibration for a volumetric flask means that the flask has been manufactured to a high level of accuracy in measuring liquids. These flasks meet strict standards like ISO or ASTM, ensuring precise volume measurements. Class A volumetric flasks are used in laboratories where accuracy is crucial, such as in pharmaceutical and chemical testing. They are calibrated at a specific temperature, usually 20°C & 27°C, to ensure consistency. Because of their precision, they are preferred over Class B flasks, which have a slightly higher margin of error. Proper handling and regular calibration checks help maintain their accuracy.

Class B – Class B calibration for a volumetric flask means it is less precise than a Class A flask but still suitable for many laboratory uses. These flasks are made with slightly lower accuracy standards and have a higher tolerance for measurement errors. They are often used in experiments where extreme precision is not required, such as general mixing or approximate volume measurements. Like Class A flasks, they are also calibrated at a specific temperature, usually 20°C & 27°C. While they are more affordable and durable, they should not be used for critical measurements in pharmaceutical or analytical testing.

Volumetric Flasks Material

Volumetric flasks are made from 3.3 Low Expansion Borosilicate glass or high-quality plastic. Glass is preferred in most cases because it is resistant to chemical reactions and can handle heat. However, plastic volumetric flasks are useful for less sensitive applications or when there is a risk of breakage.

Volumetric Flasks Sizes

Volumetric flasks come in various sizes, ranging from 1 mL to several liters. Omsons manufactures all sizes of volumetric flasks, including 1ml, 2 ml, 5 ml, 10 ml, 20 ml, 25 ml, 40 ml, 50 ml, 100 ml, 150 ml, 250 ml, 500 ml, 1000 ml, 2000 ml, and 5000 ml. The size you need depends on the volume of liquid you plan to measure. Smaller flasks are ideal for precise, small-scale experiments, while larger volumetric flasks are better for bulk measurements.

Why are Volumetric Flasks Important?

Volumetric flasks are critical for several reasons:

Precision and Accuracy: Unlike regular containers, volumetric flasks are designed to deliver highly accurate measurements. This makes them indispensable for experiments where precise concentrations are needed.
Standard Solutions: Volumetric flasks are commonly used to prepare standard solutions. These are solutions with a known concentration, which are essential for experiments like titrations.
Reproducibility: Using a volumetric flask ensures that measurements are consistent, which is crucial when repeating experiments or comparing results.
Ease of Use: The design of the flask, with its narrow neck and calibration mark, makes it easy to achieve precise measurements without guesswork.

How to Use a Volumetric Flask?

Using a volumetric flask might seem straightforward, but there are a few steps to ensure accuracy:

Clean the Flask: Before using the flask, make sure it is clean and dry. Residual chemicals or water droplets can affect the accuracy of your measurements.
Add the Liquid: If you are preparing a solution, first add the solute (the substance you want to dissolve). Then, add a portion of the solvent (the liquid used to dissolve the solute).
Mix Thoroughly: Swirl the flask gently to mix the solute and solvent. For solids, ensure they are completely dissolved before proceeding.
Fill to the Mark: Carefully add the solvent until the liquid reaches the calibration mark on the neck of the flask. To achieve this, use a dropper for the final few drops to avoid overshooting the mark.
Check the Meniscus: Look at the flask at eye level to ensure the bottom of the liquid’s curved surface (meniscus) aligns perfectly with the calibration mark.
Mix Again: Once the liquid is at the correct level, securely cap the flask and invert it several times to ensure the solution is uniform.

Applications of Volumetric Flasks

Volumetric flasks are used in a wide range of applications across different scientific fields:

Chemical Analysis: In analytical chemistry, volumetric flasks are essential for preparing solutions with precise concentrations.
Titrations: They are used to prepare and dilute standard solutions for titration experiments.
Pharmaceuticals: Volumetric flasks help in formulating drugs and ensuring correct dosages.
Environmental Testing: Scientists use volumetric flasks to analyze pollutants in water, air, and soil samples.
Educational Labs: Students learning chemistry and biology use volumetric flasks to perform accurate experiments.

Tips for Using Volumetric Flasks

Temperature Matters: The calibration mark is accurate at a specific temperature, usually at 20°C. Extreme temperature changes can cause the liquid or flask to expand or contract, affecting the measurement.
Handle with Care: Glass volumetric flasks are fragile. Always handle them gently to avoid breakage.
Avoid Contamination: Use a clean flask for each solution to prevent contamination.
Store Properly: When not in use, keep volumetric flasks in a safe place to avoid damage.

Why buy Volumetric flask from Omsons glassware?

Omsons Glassware provides volumetric flasks of Class A.
Omsons’s volumetric flask is made of high-quality Borosilicate Glass 3.3, which is resistant to chemicals and shock.
Omsons’s volumetric flasks guarantee no leaking when used with the vibe stopper.
To stop breaking, Omsons’s flasks can be equipped with an optional bumper guard.
Omsons’s flasks have a blue and white meniscus mark that makes it easier to read the solutions than the diamond-cut meniscus.
The prints on the glass pass tests for tape peel-off, acid boiling, and scratching.
In addition to traditional flasks, Omsons Glassware offers flasks with a variety of mouth holes that can be customized to meet customer needs.
Superfine glass grade is used in Omsons’s volumetric flasks.

Available Certifications

Every volumetric flask has a distinct Individual Calibration Certificate that specifies the flask’s standard volume ratio. Their batch calibration certificate identifies the stack of measuring flasks and certifies that the lot has been thoroughly examined and is fit for sale.

In addition, a calibration certificate from NABL (National Accreditation Board for Testing and Calibration Laboratories)

Volumetric Flask with QR code by Omsons Glassware

The Omsons Glassware QR Coded Volumetric Flask is a highly helpful tool for the R&D department, where a calibration certificate is a valuable asset. Omsons Glassware is the one of the leading Indian manufacturers of laboratory equipment to introduce the QR Coded Volumetric Flask.

The volumetric flask features a permanent QR Code that, when scanned, certificate will appear on your screen directly without any hassle. Getting the certificate for each flask can be challenging at the time of the audit. The volumetric flask’s QR Code, in that scenario, makes it convenient, easy, and straightforward to download and validate the certificate. The certificate is simple to save and print.

Volumetric Flask

Omsons Glassware Manufacturing Standards

Volumetric Flask's Classes

Volumetric Flasks Material

Volumetric Flasks Sizes

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