What is the difference between an analytical balance and a precision balance?

An analytical balance provides readability of 0.1 mg or better, while a precision balance typically reads to 0.001 g or 0.01 g. Analytical balances include draft shields and are designed for highly sensitive measurements. Precision balances handle larger samples and are less affected by environmental conditions.

What readability do I need for my lab application?

You need a readability that is at least one-tenth of your smallest sample weight or required measurement increment. For example, measuring 100 mg samples may require 0.01 mg readability, while gram-level work may only need 0.01 g. Selecting higher readability than necessary increases cost without improving results.

Do lab balances need to be calibrated?

Yes, all lab balances require regular calibration to maintain accuracy. Calibration ensures measurements remain traceable to certified standards. Internal calibration simplifies this process by automating adjustments, while external calibration requires manual verification with certified weights. In regulated environments, calibration records must be documented and retained.

What is the difference between readability and repeatability?

Readability is the smallest increment of weight a balance will display. Repeatability is the degree of agreement between multiple measurements of the same mass, on the same balance, under the same conditions.

What is the best way to clean my balance to ensure accurate readings?

Inspect and clean before each use. A flannel cloth or soft brush works well for dusting and light cleaning. Use a non-abrasive cleaner for light spills, and a dry flannel cloth for glass parts. Set a regular maintenance schedule for deep cleaning to ensure optimal performance and instrument longevity.

Can vibration affect the accuracy of my balance?

Yes — even slight vibration from a heavy footstep can affect accuracy. Place the balance on a sturdy benchtop away from high-traffic areas such as hallways, elevators, stairways, and doors. If that placement is not possible, an anti-vibration table should be considered.

Easier Small Volume Distillations

TOPICS:small volume distillations

Posted By: Cole-Parmer Blog Team June 18, 2015

Smaller samples save time. The new Environmental Express^® SimpleDist^® Micro distills 26 samples simultaneously for easier distillation. It also eliminates the need for costly glassware through the use of disposable polypropylene SimpleDist tubes. No cooling water is required.

The EPA has approved the use of micro distillation systems with disposable tubes for reporting on cyanide. The system can also adapt to report on ammonia and phenols as well.

The SimpleDist^® Micro distillation system follows established EPA methods 335.4 and 350.1, and Standard Methods 4500-CN-C and 4500-NH3.

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Need more information or have questions? Contact out technical support team.

Easier Small Volume Distillations

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