Analytical Instrumentation

  • Accurate determination of fluorine, chlorine, and sulphur at trace level (
    Peak Overlay Calibration Standards

Accurate determination of fluorine, chlorine, and sulphur at trace level (<100 ppb)

Aug 20 2019 Read 384 Times

Combustion Ion Chromatography enables the determination of speciated halides and sulphur compounds by a single analysis. TE Instruments developed a fully automated, extremely compact sample preparation system covering the pyrohydrolytic combustion, fraction collection, and sample injection towards any IC. The XPREP C-IC is the only configuration capable of introducing liquid samples both via optimised direct injection module and conventional boat-inlet system into a horizontal furnace. Sample introduction by direct injection improves the analytical results for trace level applications such as aromatic hydrocarbons and ultrapure chemicals.    

A larger sample volume (100 µL) can be introduced into the direct injection module compared with boat-inlet systems. Controlled sample evaporation at 1 µL/s eliminates the need for a boat program and decreases the time of sample combustion dramatically. Multiple sample combustions can be collected in the same absorption tube, which increases the concentration of analytes in the absorbance medium. The analytical results at trace level are significantly improved by adjusting the number of sample combustions, volume of absorbance liquid, size of the IC sample loop, and use of a pre-concentrator.

The XPREP C-IC sample preparation system was connected to a high-end IC to generate a fully automated C-IC configuration. Calibration standards made from fluorobenzene (F), chlorobenzene (Cl) and Dibenzothiophene (S) in Xylene were analysed, covering a range of 25 – 100 ppb for each element. Excellent calibration line fits (>0.999 r2) were created by optimizing the number of sample combustions for each analysis. The table below demonstrates high precision of analysed results at trace level (<100 ppb), which is well below the scope of international test methods currently available such as ASTM D7359 and UOP 991.

The direct injection module allows faster and more controlled combustion of larger sample volumes in comparison with boat-inlet systems. A higher concentration of analytes will be trapped in the absorbance medium, providing the best possible results for analysing liquid samples with combustion-IC at trace level.   

The recently launched XPREP C-IC has a small footprint, which saves bench space. It enables speciated halide and sulphur analysis by any of the well-established ICs, offering controlled sample introduction compatible with direct injection and boat-inlet. This sample system features a 65 position fraction collection unit facilitating the immediate analysis or storage of combusted samples and performs oxidative pyrohydrolitic combustion of solids, liquids, gas and LPG

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

Petro Industry News Buyers Guide 2020

January 2020

In This Edition Fuel For Thought - Successful JASIS sees Tanaka announce appointment of new general manager - USA appointments underpin Signal Group growth plan - Leading European sensor tr...

View all digital editions


SLAS 2020

Jan 25 2020 San Diego, CA, USA

European Gas Conference

Jan 28 2020 Vienna, Austria

EGYPS (Egypt Petroleum Show)

Feb 11 2020 Cairo, Egypt

Smart Factory Expo (SFE 2020)

Feb 12 2020 Tokyo, Japan

ME-TECH 2020

Feb 18 2020 Abu Dhabi, UAE

View all events