Exeter Analytical UK Ltd
Exeter Analytical is a company dedicated to elemental analysis. We manufacture and supply instrumentation for the determination of Carbon, Hydrogen, Nitrogen, Sulfur and Oxygen. We also run a full analytical service laboratory called Warwick Analytical Service.
Exeter Analytical sell the world renowned CE440 Elemental Analyser with its unique horizontal sample introduction. Widely regarded as the most accurate and precise elemental analyser on the market today. Capable of analysing a wide range of sample types from simple organic materials to difficult to combust refractory type materials.
Warwick Analytical Service
Warwick Analytical Service offer a comprehensive analytical service including:-
Carbon, Hydrogen, Nitrogen, Sulfur, Chlorine, Bromine, Iodine, Fluorine. Metals Analysis (70+ elements via ICP analysis). Optical Rotation, Mass Spec, NMR, FTIR, ParticleSize, Thermal Analysis,other analytical techniques available upon request.
Warwick Analytical Service hold a wide range of accreditation including BSI ISO 9001, UKAS ISO 17025, GMP Compliance.
Designed as a safe method for igniting samples when using the Schöniger flask method.
The Schöniger flask method is a well proven technique for the combustion and then subsequent analysis of a range of elements including Chlorine, Bromine, Iodine, Sulfur, Phosphorus and a number of metals. The combustion of the sample is a simple procedure and involves placing a few millilitres of absorbent solution in a flask. The sample is weighed out and placed in an ashless filter paper holder which in turn is placed in a platinum basket attached to the stopper of the flask. The flask is filled with oxygen and the stopper is then placed in the flask. The sample is combusted and the resultant combustion products are absorbed into the solution. The technique chosen for the actual determination of the element in question can be any one of a number of different techniques i.e. titration, ion chromatography, etc. The Schöniger flask combustion method is capable of being used for the determination of percentage levels to parts per million. It can cope with a wide range of sample types and is simple to set up with minimal start up costs.
Inductively Coupled Plasma - Optical Emission Spectroscopy
Determination of Trace Metals in organic materials
The determination of many elements can be carried out using ICP-OES analysis. Inductively coupled plasma - optical emission spectroscopy (ICP-OES) is the measurement of the light emitted by the elements in the sample introduced into the ICP source...
Limit test for heavy metal impurities in organic samples
The limit test for heavy metals is a qualitative test that demonstrates that the content of metallic impurities that are coloured by sulphide ion does not exceed the limit specified in the US Pharmacopeia 231 and European Pharmacopeia 2.4.8...
Analysis of Carbon, Hydrogen & Nitrogen (CHN) in organic/inorganic materials
CHN analysis provides a quick and inexpensive method to find sample purity, and in conjunction with MS and NMR data is commonly used to characterise a compound...
The oxygen flask method for the determination of chlorine in organic and inorganic compounds consists of a combustion procedure followed by appropriate titrimetric determination. Combustion of the sample in oxygen yields water-soluble inorganic products, percentage chlorine is determined by titration with Mercuric Nitrate solution using diphenylcarbazone indicator. Chlorine analysis in the presence of Chromium, Molybdenum or Mercury is not recommended...
Accurate, precise and reproducible data for halogens can be achieved for a wide range of sample types, including polymers.
These methods can be used together with CHN analysis to provide a quick and inexpensive method to check sample purity, and in conjunction with mass spectrometry and NMR data, can be used to characterize a compound.
The oxygen flask method for the determination of Iodine in organic and inorganic compounds consists of a combustion procedure followed by a titrimetric determination. Combustion of the sample in oxygen yields water-soluble inorganic products. After combustion an excess of Bromine in Acetic Acid is added to convert Iodine to Iodate. Formic Acid is added to destroy the excess Bromine. The solution is acidified with dilute sulphuric acid and an excess of potassium Iodide added. The liberated Iodine is titrated with Sodium Thiosulphate....
Micro determination of fluorine in organic materials
The accurate micro determination of fluorine in organic compounds is of significant interest to a wide array of industries including food and beverages, environmental monitoring, medical, pharmaceutical and polymers...
The oxygen flask method for the determination of sulphur in organic and inorganic compounds consists of a combustion procedure followed by a titrimetric determination. Combustion of the sample in oxygen yields water-soluble inorganic products, Percentage sulphur is determined by titration with Barium Perchlorate using Thorin screened with methylene blue indicator. Sulphur analysis in the presence of Phosphorus is not recommended...