Fact or Friction - METTLER TOLEDO

Fact or Friction
Your Questions Answered

Is your balance display slowly drifting while trying to take a weight? Have weighing processes been optimized but the balance reading is still unstable? These issues are often attributed to a well-known culprit: static electricity.

Electrostatically charged sample can not only be a frustration in the lab, but they can adversely affect weighing accuracy and lead to significant errors.

Learn more by reviewing common questions and answers about static and by downloading our free anti-static guide.
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Friction is the most common way electrostatic charges are generated

While not the only way to cause electrostatic charges, friction is the most common. Laboratory tasks such as using a cloth to dry a glass beaker, picking up a measuring flask with disposable gloves, or filling a weigh pan with powder can generate measurable electrostatic charges that interfere with weighing results.

The climate conditions of your lab affect your weighing results

Relative humidity less than 40-50% increases issues with electrostatic charge. The is because the lower the humidity, the less chance of charged particles finding water molecules to “Surf” across and get to a convenient ground.

Depending on the relative humidity, a charge may take a few seconds to several minutes to dissipate. In a controlled, dry atmospheres (less than 20% Relative Humidity), charges on material may cause weights to drift several hundred milligrams and persist over many hours.

There is no way to dissipate electrostatic charges

METTLER TOLEDO anti-static kits use alternating current (AC) to generate ions that neutralize the electrostatic charge of a sample or container immediately. This method is effective, completely safe, and does not disturb air currents or increase stabilization time. The time-savings, efficiency gains and safety improvements make it a sound investment that lab specialists often wish they had made earlier.

Learn more about static solutions by downloading our free guide today.
Download the Guide   

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