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H2S in Liquids Analyzer for Lab Allows Quick and Simple Analysis Without False Positives

This crude oil analyzer is ideal for use in refinery laboratories, vessel/tank storage terminals, loading and offloading crude oil, as well as inspection and independent testing labs

by Analytical Systems Keco
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Houston, TX — January 8, 2020 — Analytical Systems Keco introduces the 205L Laboratory H2S in Liquids Analyzer that quantifies hydrogen sulfide 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 analyzer is the fastest on the marketing, offering results within 10 to 15 minutes. The crude oil analyzer is ideal for use in refinery laboratories, vessel/tank storage terminals, loading and offloading crude oil, as well as inspection and independent testing labs.  

Analytical Systems Keco 205L Laboratory H2S in Liquids AnalyzerAnalytical Systems Keco's 205L Laboratory H2S in Liquids Analyzer.Credit: Analytical Systems KecoWhile 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 Analyzer utilizes a rateometric-colorimetric tape detection method that only responds to H2S. In addition, the analyzer 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 analyzer is fully factory-calibrated with actual liquid samples in a process similar to NIST standards. Other analyzers calibrate using a blended gas-phase sample that compromises a true liquid to a gas phase conversion.

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Operations are user-friendly as operators only need to fill the provided sample container with the liquid product and connect to the analyzer and push one button to automatically start the sample test. There is no need to treat, scrub, or weigh samples. For more information, refer to or contact Umberto Cabarrocas at

About Analytical Systems Keco

Analytical Systems Keco, LLC is a Houston-based manufacturer of process and laboratory analyzers used in the oil & gas, water, marine, and process markets. For more than 30 years, the company has served refineries, chemical plants, gas processing plants, and the food & beverage industry with field-proven products that analyze crude oil, gas, and liquids. Among its notable products are analyzers that measure oil in water and liquid analyzers that measure H2S in water, crude, amine, diesel, gasoline, and naphtha.