If you look at chemistry laboratories, you will see a wide array of glassware products around. There are many uses to these glassware products. In quantitative chemistry, for instance, it is vital to measure liquids accurately. If you must make volume measurements in chemistry labs, the error should only be one part per thousand or 0.1%. The use of volumetric glassware is essential for this purpose. When it comes to this type of glassware product, this glassware can contain or deliver some hundredths of a milliliter. So, it is very much possible for you to measure quantities over 10 mL to four figures.
You can expect volumetric glassware providing this kind of precision and accuracy to be expensive for laboratory use. Besides choosing precise and high-quality volumetric glassware, you also need careful and skilled technicians for the job. There are four main kinds of volumetric glassware that is commonly utilized in chemistry labs. You have the so-called buret, the pipet, the graduated cylinder, and the volumetric flaks. Each of these types of volumetric glassware has their own purpose. Though they have unique functions in the laboratory, there are commonalities between each of them. When it comes to volumetric glassware products, they are all similar in terms of their cleanliness as well as ability to offer accurate volume readings. You can view here for more info.
You can get good results from your volumetric glassware products when there is cleanliness. There is a uniform film of water in glass that is chemically clean. It is impossible for you to see hanging droplets with your eyes with clean glassware. After using any volumetric glassware of yours, make sure that you rinse it with deionized water. It will be best to wash the volumetric glassware before using it if you are not sure if they are clean. For some kinds of volumetric glassware, you need to condition the apparatus by rinsing it with a few drops of the solution that you will be measuring before starting the actual work. When you do this, you will be avoiding the presence of water droplets that will change the concentration of the solution once it is diluted.
If you look at all volumetric glassware products, you will notice that they are calibrated. For calibration on volumetric glassware, markings are used that will help determine the particular volume of liquid to different degrees of accuracy. The meniscus of the liquid is what you use to get the accurate volume measurement of any liquid in the glassware. From the curved surface of the liquid, the bottom part is what you call the meniscus. Locate this part and check the scribed line for the volume. If you want to see the meniscus easier, you can put a white card or paper behind the apparatus. Avoid reading the meniscus above or below eye level because doing so leads to inaccurate readings. Get volume readings at the eye level.