Product Information

CH&N Analysis

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CH&N analysis is carried out by combustion analysis on one of our elemental analysers. The original analytical method is based on the complete and instantaneous oxidation of the sample by dynamic flash combustion which converts all organic and inorganic substances into combustion products. The resulting combustion gases pass through a reduction furnace and swept into the chromatographic column by the He carrier gas. Here they are separated and eluted as nitrogen, carbon dioxide, water and sulfur dioxide, and detected by a thermal conductivity detector (TCD) which gives an output signal proportional to the concentration of the individual components of the mixture. The instrument is calibrated with the analysis of known standard compounds.

CH&N analysis is a cost-effective means of establishing sample purity on a wide range of sample types from volatiles to polymers. It is an essential tool in sample characterisation when used in conjunction with other techniques.

Same-day sample turnaround is available for extremely urgent requests, although most results are reported within two working days. Accuracy is ±0.30% absolute.

Minimum sample size is from 2 mg.

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About us

With over 30 years’ experience in providing a first-class analytical service for pharmaceutical and chemical samples, Medac Ltd are the UK’s best known supplier of high quality testing and determination systems that have proven to be effective and low in cost. Based in Surrey, our company was established in 1988, catering primarily for the pharmaceutical, chemical and biotechnology companies spread across the UK and beyond. All procedures we follow as a company meet the guidelines set out by our quality management system, which has been incorporated into each and every analytical project.

We at Medac Ltd offer a unique range of testing and analysis services that have been highly recommended by our customers for many years, some of which include;

Air Sensitives
CH&N Analysis
Sulfur Analysis
Oxygen Analysis
The Halogens
Metals (ICP)
Anions (IC)
Moisture Determination
Residue on Ignition / Ashing Methods
Other Services

Priding ourselves on being the UK’s number one chemical consultancy service, we at Medac Ltd believe that elemental micro analysis is absolutely essential for any laboratory-based establishment. Our main focus as a company is to offer dedicated customer service by utilising the latest analytical technologies with our extensive amount of experience that has been gained over the years. We also work within academic institutions to test samples safely and professionally, ensuring maximum efficiency across all projects. We analysis solids, liquids, oils, organics and inorganics, organometallic samples, metals and plant materials, using our impressive amount of knowledge and skill.

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Articles/Press Releases

12/05/2021 - What's in my Sample?
One of the questions we are often asked is “can you tell me what’s in my product as it is not the colour it should be?”
12/05/2021 - Same-day Analysis
One of our long standing customers recently had a new project and needed us to analyse their samples in duplicate for C, H, N, S and iodine.
12/05/2021 - Steam Railways
Although the majority of our work is received from existing clients we are always happy to hear from new customers.

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Latest Reviews

Medac Ltd

Thank you for the very rapid turnaround on our recent CHNS submission. These thanks are both from myself and from the associated researcher. I hope all is well with your business in these hard times.

By Bob Slade - 06 May 2022

Medac Ltd

Thank you for your prompt and efficient service earlier this year for my group.

By Andrew - of University pharmacy dept - 31 May 2019

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Company details for Medac Ltd

Medac Ltd