• Gas Standards for Formaldehyde

Air Monitoring

Gas Standards for Formaldehyde

Jan 10 2012

Trace Source™ Permeation Tubes from Kin Tek Laboratories (USA) are used to dynamically blend trace concentrations of formaldehyde in air. Mixtures can range from low ppb to over 500 ppm.

Obtaining accurate gas standards has been particularly difficult because formaldehyde vapour condenses to a solid polymer at temperatures below 80°C, resulting in unstable concentration in stored mixtures.

In Trace Source™ permeation tubes, alpha-polyoxymethylene, a high purity formaldehyde polymer, decomposes to maintain a stable vapour pressure of formaldehyde and consequently a stable emission rate of formaldehyde. Formaldehyde emitted from the Trace Source™ tube is mixed with a known flow of zero air to form the trace concentration gas standard.

Emission flow measurements are traceable to NIST through fundamental measurements (weight change, temperature, etc.). Mixing the emission flow with a traceable flow dilution gas creates a traceable mixture.


Digital Edition

AET 28.3 September 2024

September 2024

Business News - ENVEA announces acquisition of APAQ Group - SICK and Endress+Hauser sign strategic partnership - Efforts to curb gas flaring intensify amid environmental concerns Air Monito...

View all digital editions

Events

Waste & Recycling Expo

Nov 05 2024 Toronto, Canada

Ecomondo

Nov 05 2024 Rimini, Italy

Vietwater Ho Chi Minh 2024

Nov 06 2024 Ho Chi Minh City, Vietnam

Intech

Nov 12 2024 Tel Aviv, Israel

Ecofira

Nov 12 2024 Valencia, Spain

View all events