Water/Wastewater

  • Maintenance Free Ammonia Measurement

Maintenance Free Ammonia Measurement

Apr 10 2019 Read 324 Times

Measurement Technique: A Unique Method UV-Vis Spectroscopy after gas stripping
Tethys Instruments SAS
’ online ammonia analysers have been widely used for industrial and municipal waste water applications for many years. Tethys ammonia measurement is based on UV absorption of ammonia gas after a stripping phase. NH4 is converted in to its gas phase by addition of NaOH. NH4 is measured in the gas phase through the UV Absorption spectroscopy principal. Consequently, the turbidity or colour of the sample has absolutely no influence and measurements can even be carried on activated sludge. It gives exceptionally selective measurements for ammonia without any drift as an automatic zero is performed on each measurement on ambient air. The ammonia gas has a typical periodic absorption spectrum that is analysed using a Fast Fourier Transform (FFT) that brings exceptional selectivity. No interference has ever been reported after years of operation on many different applications.
Operators have reliably used Tethys’ analysers as they perform ammonia measurement without interference from other ions present in the sample. The instruments have a narrow spectrum bandwidth hence they carry out completely interference free measurement. With completely drift free measurement, span calibration is not usually required after a long period of time. Tethy’s analysers’ also feature an auto zero calibration facility ensure drift free measurement The analyser’s patented flow cell allows operation even with very high level of suspended solid without clogging. No filtration is required on a majority of waste water applications. Maintenance can be simplified with an optional auto cleaning facility and the sample does not make direct contact with the detector or light source. A multi parameter unit can be configured to measure other properties such as NH4, COD, BOD, pH, TSS, NO3 and PO4.

Reader comments

Do you like or dislike what you have read? Why not post a comment to tell others / the manufacturer and our Editor what you think. To leave comments please complete the form below. Providing the content is approved, your comment will be on screen in less than 24 hours. Leaving comments on product information and articles can assist with future editorial and article content. Post questions, thoughts or simply whether you like the content.

Post a Comment




Digital Edition

International Environmental Technology June 2019

June 2019

In This Edition Business News - Gasmet Technologies acquires MonitoringSystems GmbH - Royal sponsorship for World Soil Museum - CDS Analytical acquires the rights to Empore™ products G...

View all digital editions

Events

DXC 2019

Aug 05 2019 Lombard, IL, USA

APBE 2019

Aug 16 2019 Guangzhou, China

World Water Week 2019

Aug 25 2019 Stockholm, Sweden

Sensor China

Sep 02 2019 Shanghai, China

Aquatech Mexico

Sep 03 2019 Mexico City, Mexico

View all events