Posts Tagged ‘bottletop burette’

Should I Buy a Manual Bottle-top Burette?

Before nails, bolts, and screws, carpenters had to find other ways to get buildings to stand up without collapsing. Mixing mud or cement takes extra labor, so does carving notches into each and every post and beam. The hammer-and-nail did wonders in terms of saving time, money, and labor. There’s a device that performs a…

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Use a Bottletop Burette for Accurate Liquid Measurement

A CAT post discussing the importance of temperature control in lab experiments noted the distinction between precision and accuracy.  The same distinction applies to measuring liquid.  Precision can be defined as dispensing the same amount of liquid time after time, suggesting that the equipment is precise.  Accurate dispensing means that the correct amount of liquid…

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When to Specify a Rinse Port Bottletop Burette

You’ll find a lot of info on our website dealing with cleaning and maintaining homogenizers, mixers, and stirrers.   Here we share information on a special feature of our top-of-the-line motorized bottle top Contiburette® that streamlines cleaning procedures with its built-in rinse port. But first a note on burettes in general.  Many labs continue to use…

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Bottletop Burette Operating Tips

Bottletop burettes such as the Contiburette® models offered by CAT Scientific are often preferred over glass tube volumetric burettes and pipettes because of their ease of operation and improved accuracy.  Moreover they greatly reduce the incidents of operator error and are much easier to clean. Like all precision lab instruments bottle top burets work best…

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What to Look For in an Entry Level Bottletop Burette

Digital bottletop burettes are precision dispensing tools in many research organizations.  A reason for their popularity is ease of use and high precision when compared to volumetric glass tube burettes and pipettes.  They are also easier to clean and maintain, and are not nearly as subject to breakage. Labs contemplating the purchase of a digital…

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Things to Know about Bottletop Burettes

A bottletop burette is a precision dispensing and titrating tool that offers superior accuracy and ease of use compared to volumetric burettes and pipettes.  The latter are typically glass tubes with calibration marks on the side.  Volumetric burettes have a valve at the bottom allowing researchers to dispense a determined amount of liquid; pipettes are…

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How to Avoid Meniscus Measuring Errors

Glass tube lab pipettes and burettes are capable of precisely dispensing reagents into samples but require outstanding patience and an accurate eye to take into account the meniscus of the reagent.  Most menisci are concave or U-shaped with the liquid in contact with the tube wall reading higher than at the center.   This property characterizes…

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Bottle Top Burettes need TLC Too!

The temptation to become lax in cleaning and maintaining bottletop burettes can lead to real problems.  This is why any company using a bottle-top buret for dispensing, metering, titrating or dosing should have a strict and easily understood standard operating procedure (SOP) as part of confirming to good laboratory practice (GLP) within their organization. Why…

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Titration with a Bottletop Burette

Simplify Titration with a Bottletop Burette Titration is a common laboratory exercise employed to determine the unknown concentration of a substance called the analyte (a.k.a. titrand or what you are analyzing for) in a solution.   This is accomplished by carefully and precisely metering a reagent (a.k.a. titrant) into the solution until a reaction occurs.  The…

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Calibrating a Bottletop Burette

When to Calibrate a Bottle Top Burette Let’s start with why we should calibrate a bottle top burette.  Bottletop burets are designed to precisely meter reagents into a vessel until a reaction occurs.  Accuracy is paramount, and in the case of burettes we’re talking in increments of micro liters (µl).  Bottletop burettes are mechanical devices…

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