Carbon and nitrogen analyser for water samples, and carbon analyser for solid sa

Type of equipment:
Carbon and nitrogen analyser for water samples, and carbon analyser for solid samples.

 

Photo:

Technical description/model and performance:
Skalar, Formac HT-I and ND 25 module coupled with an autosampler for 80 samples. A Primacs MSC module for solid samples is also coupled to the IR detector. This has a manual feed for individual samples. The IR detector has a measuring range of 0.1-5000 mg C/L. The chemiluminescence detector has two measuring ranges; a high range of 5-200 mg N/L and a low range of 0.05-5 mg N/L. The Primacs module can be heated to 1100 C and has been proven capable of detecting down to 10 µg C.

Field of application:
It has been primarily been used to measure organic carbon and total nitrogen in water samples, and particulate carbon collected in a filter.

Basic Mode of Operation:
The sampled water is injected into a combustion furnace with a temperature exceeding 850 C. During combustion, carbon dioxide is formed, which is measured via an IR detector and the quantity of carbon in the sample is thus determined. During combustion, all bound nitrogen is converted to NO which is mixed with ozone in the chemiluminescence detector, forming excited NO2. Once decomposed, this is fed in using a PMT tube. The solid sample is placed in a separate furnace, where the formed carbon dioxide is passed through the IR detector.

Location:
The instrument is located in KBC building H, room A3-30-15.

Access to the instrument:
The instrument is part of the infrastructure available via the Biogeochemical Analytical Facility (BAF). Booking of analyses is done via the website.

Other information:
A list of prices for analyses can be found on the BAF website.

Responsible:
Anders Jonsson, Department of Ecology and Environmental Sciences

Email:
anders.jonsson@umu.se

Ulf Sandqvist
3/14/2019