Analytical Instrumentation

  • H2S in liquids analyser for labs enables quick and simple analysis without false positives 

H2S in liquids analyser for labs enables quick and simple analysis without false positives 

Jan 17 2020 Read 205 Times

Analytical Systems Keco recently introduced the 205L Laboratory H2S in Liquids Analyser that quantifies hydrogen sulphide in crude oil, fuel oil, naphtha, water, diesel, and gasoline.  The removal of H2S in crude oil, condensate and other liquid products before transport or storage is imperative to reduce the risk of health and safety issues as well as product quality control. In addition to providing the highest precision in testing for hydrogen sulfide in crude oil, the analyser is the fastest on the marketing, offering results within 10 to 15 minutes. The crude oil analyser is ideal for use in refinery laboratories, vessel/tank storage terminals, loading and offloading crude oil as well as inspection and independent testing labs.   

While other analytical methods suffer from false positives and readings due to cross-interferences with CO, H2, hydrocarbons or other components present in liquid samples, the Model 205L H2S in Liquids Analyser utilises a rateometric-colorimetric tape detection method that only responds to H2S.  In addition, the analyser uses a Sample Transfer Stripper™ (STS) technology that acts as an ultra-effective filter, blocking any mists or liquid carry-overs to radically reduce any maintenance requirements.  The technologies in the 205L result in an extremely precise and reliable method for determining H2S in liquid samples. 

In operation, the H2S in the liquid sample sweeps the STS unit, which then allows the H2S to permeate through the exclusive ASI membrane technology. A carrier then sends the H2S in the gas/vapor phase to the colorimetric-rateometric tape detector for quantitative analysis in ppb, ppm, and up to saturation levels.  Proof of representative stripping of H2S from a liquid sample lies in the factory liquid calibration process and validation. The analyser is fully factory-calibrated with actual liquid samples in a process similar to NIST standards.  Other analysers calibrate using a blended gas-phase sample that compromises a true liquid to a gas phase conversion. 

Operations are user-friendly as operators only need to fill the provided sample container with the liquid product and connect to the analyser and push one button to automatically start the sample test.  There is no need to treat, scrub or weigh samples.

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