China Different Size Clear Or Amber Glass Volumetric Flask with Stopper Manufacture and Factory

Different Size Clear Or Amber Glass Volumetric Flask with Stopper

Short Description:

Product Name: Volumetric Flask

Characteristic:

1. Class A

2. With ground–in glass stopper or plastic stopper

Material: Boro 3.3 glass

Color: Clear and amber

OEM is available

Payment Term: T/T,L/C,Western Union,Palpay

Samples: Offered within 5 days generally

Loading Port: Qingdao /Shanghai port or up to customer

Delivery Time:15-30 days up to customer’s quantity

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Volumetric Flask Introduction

The volumetric flask is a precise instrument used to prepare a solution with an accurate amount and concentration of a certain substance. The volumetric flask is a thin-necked pear-shaped flat-bottomed flask with a scale on the neck. It is made of colorless or brown glass with a ground glass stopper or plastic stopper. It is mainly used for preparing standard solutions and accurately diluting solutions by direct method and preparing sample solutions.

Product Specification

1621A	Volumetric Flask grade A.,With ground–in glass stopper or plastic stopper, clear
Capacity(ml)	Capacity tolerance(±ml)	Ground mouth	Height(mm)
5	0.02	7/11	74
10	0.02	7/11	90
25	0.03	10/13	110
50	0.05	10/13	140
100	0.1	12/14	170
200	0.15	14/15	210
250	0.15	14/15	220
500	0.25	16/16	260
1000	0.4	19/17	310
2000	0.6	24/20	370

1622A	Volumetric Flask,grade A,With ground–in glass stopper or plastic stopper, amber
Capacity(ml)	Capacity tolerance(±ml)	Ground mouth	Height(mm)
10	0.02	7/11	90
25	0.03	10/13	110
50	0.05	10/13	140
100	0.1	12/14	170
200	0.15	14/15	210
250	0.15	14/15	220
500	0.25	16/16	260
1000	0.4	19/17	310

Precautions for the use of volumetric flasks

1. Substances that are easy to dissolve and do not generate heat can be directly dissolved in a volumetric flask. Other materials can basically not dissolve the solute in the volumetric flask. The solute should be dissolved in the beaker and transferred to the volumetric flask.
2. The total amount of solvent used to wash the beaker cannot exceed the marking line of the volumetric flask. Once it exceeds, it must be re-prepared.
3. The volumetric flask cannot be heated. If the solute emits heat during the dissolution process, wait until the solution is cooled before transferring, because the bottle will expand as the temperature rises, and the measured volume will be inaccurate.
4. The volumetric flask can only be used to prepare the solution, and the solution cannot be stored for a long time or for a long time, because the solution may corrode the bottle body, thereby affecting the accuracy of the volumetric flask.
5. After the volumetric flask is purchased, it must be cleaned and calibrated, and it can be used only after the calibration is qualified.

Questions and answers about the use of volumetric flasks

1. Leak test method for volumetric flask?
Answer: Before use, you should check whether the stopper of the volumetric flask is tight. For this, you can fill the bottle with tap water to near the marking line, cover the stopper, hold the stopper by hand, invert the volumetric flask, and observe whether there is water at the mouth of the flask. If it does not leak, put the bottle upright, turn the cork about 180° and try it upside down again. In order to prevent the cork from being lost and messing up, usually use a plastic string to tie it to the bottleneck.

2. How to transfer the solution to the volumetric flask?
Answer: During the transfer process, insert a glass rod into the volumetric flask. The mouth of the beaker is close to the glass rod so that the solution flows slowly along the glass rod. The lower end of the glass rod should be close to the inner wall of the bottleneck, but not too close to the bottle mouth to avoid The solution overflowed. After the solution has flowed, lift the beaker slightly upwards along the glass rod while standing upright so that a drop of solution attached to the beaker’s mouth flows back into the beaker. It can be washed 3-4 times with a small amount of distilled water. Volumetric flask.

3. How to dilute the solution with a volumetric flask?
Answer: After the solution is transferred to the volumetric flask, add distilled water. When it is diluted to about 3/4 volume, shake the volumetric flask several times for preliminary mixing, so as to avoid volume changes after mixing. Then continue to add distilled water, and carefully add it drop by drop when it is close to the marking line, until the meniscus of the solution is tangent to the marking line, and close the stopper tightly.

4. How to shake the volumetric flask?
Answer: Press the stopper with the index finger of your left hand, press the tip of your right finger against the bottom edge of the bottle, turn the volumetric flask upside down and shake it, and then turn it upside down to make the bubbles rise to the top. Repeat this for 15-20 times to mix.

5. How to calibrate the volumetric flask?
Answer: Weigh a certain volume of water, and then convert the mass of water to volume according to the density of the water at that temperature.