Ductless fume hoods or fume cupboards are often used in laboratories to capture and remove hazardous substances from the air which are produced during certain laboratory applications. These can be gases, vapours, aerosols or particulates (dust). The fume hood encloses a work bench area that has a fan unit at the top. This sucks the air from the front opening upward through filters which trap th...
There are two types of filtration which are commonly used in the laboratory and it is important to select the correct type for the work you are doing.
But what is the difference between gravity and vacuum filtration?
How do you choose what type of filtration you need to do?
And what equipment do you need for each type?
Vacuum Filtration - also known as Buchner filtration - for when you nee...
Filtration under vacuum, also known as Büchner filtration, is commonly used to isolate the solid precipitate from a solution.
This technique is used in syntheses, for example when a reaction has yielded a solid, or in analyses including gravimetric analysis of suspended solids.
Although performing the filtration is simple, several pieces of equipment are needed which must all fit together, so...
Vacuum filtrations using a Buchner flask and funnel with a vacuum pump are commonly used to isolate a solid of interest from a liquid.
Most commonly a porcelain Buchner funnel with a filter paper placed on top is used, but in some instances a sintered disc funnel is more appropriate.
But when would you select a sintered disc funnel? And how should a sintered disc filter funnel be cleaned ...
How do you choose the right size filter paper for your funnel? Use the table below to see what size filter paper you should use Gravity filtration using a filter paper inside a filtration funnel is used to remove precipitates from a liquid. The remaining liquid is known as the filtrate. For standard shaped filter funnels where the walls are at 58 or 60° the table below shows the r...
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I came across your article about "DPD Tablets" on Camlab Info, and it's a valuable resource for anyone seeking information about water testing and analysis using DPD tablets. Your explanation of their usage and significance in water quality monitoring is quite informative.
This article on nanocolor tube tests is a gem for analytical enthusiasts. The idea of zero calibration is intriguing, and your detailed explanation makes it accessible. The step-by-step process helps demystify the technique for beginners like me. The use cases you've highlighted, particularly in...
Grant have introduced the new Controlled Rate Freeze Thaw (CRFT), which is a liquid nitrogen and cryogen free controlled rate freeze and thaw system for cryopreservation in a wide range of applications. Cryopreservation is a process where biological materials such as cells, tissues...
A dipslide is a means of testing the microbial content of liquids. This is a common method of monitoring and measuring microbial activity within many systems and commonly cooling systems. Usually the use of a dipslide is the first line of defence for the testing of microbial issues that could be...
Purchasing items using donated funds without the burden of VAT will now save many Millions of pounds each year which can be put to better use in advancing scientific knowledge to provide new treatments and cures that will shape the medicines of the future.
Working with pressure/vacuum conditions in the lab is common but not all products are designed to withstand this. Products with appropriate geometry and wall thickness are suitable for working safely with pressure. For example, filtering flasks, desiccators, or flat flange vessels, as well as...
