Knowledge

 

Sensing technologies

AN-09 - Sulfur-based compounds in hydrogen

A sample containing sulfur-based compounds in hydrogen was analysed using gas chromatography coupled with the Enhanced plasma discharge (Epd)technology. The results show that all the sulfur-based compounds could be detected, with a LOD down to 1ppb.

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EPD User Guide

Epd User Guide

Introduction to the enhanced plasma discharge detector much more than a detector.

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AN-15: Trace Sulfur In Fuel-Grade H2 Wihtout SCD, FPD And Thermal Desorber. A Process GC Solution - KA8000Plus Test Report

The fuel-grade hydrogen mar-ket is currently booming. Stand-ards containing the maximum allowable concentration of im-purities in hydrogen were re-cently defined as well as laboratory oriented analytical methods. Currently, for ultra-trace sulfur analysis, a gas chromatograph based on a SCD detector is suggested by some standards for laboratory tests. However, the SCD de-tector is less than ideal for process use due to its size, re-quired maintenance and potential hazard due to the use of ozone and heated furnace. Another contender is the PFPD, but this detector is also difficult to use on the field and in-volves the use of a hazardous flame which is again not ideal with the presence of flammable hydrogen.

The KA8000Plus from KA Solutions, powered by ASDevices, has been selected as the preferred process-oriented solu-tion by Impact Scientific Instrument. All the components are high quality and the sensor, the SePdd, is very simple to use. It only involves the use of inert carrier gas and is solid state. Also, there is no need for a thermal desorber to con-centrate the sulfur impurities contained in the sample to achieve the 4 ppb LOD (Limit Of Detection) target defined as the current standard.

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Valves and fittings

AN-05 - Purged Lip Sealing Valve

Based on decades of expertise in designing chromatographic methods and valves, a revolutionary concept is born, the Purged Lip Sealing Valve (PLSV). The PLSV combines the best of diaphragm and conical rotary valves without any of their drawbacks.

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AN-08 - A Quantum leap for chromatographic valve

AN-08 - A Quantum leap for chromatographic valve

This application note demonstrates the unique characteristics of the Purge Lip Sealing Valve (PLSV).

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AN-10 - uInProve for sulfur analysis

Ultra-trace sulfur analysis is known to be a difficult measurement. Special consideration need to be taken in regards to the inertness of all inert parts. For that reason, special coating technologies were developed. A component that has suffer from poor performance with inert coating is the chromatographic valve. This document explains the benefits of the PLSV valve technology.

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AN-11 NEW METHOD USING ARGON AS AN ALTERNATIVE TO HELIUM FOR SUB-PPB LEVEL MEASUREMENT

This application note will present a new measurement method using the ASDevices' pre-concentration system based on the Trap & Release Purge Lip Sealing Valve. Such method can be used to simplify the  chromatography and improve the limit of detection for permanent gases in various matrix. Thanks to our unique proprietary nanostructured trapping materials and the valve matrix venting feature, most of the matrix can be easily eliminated without using a heartcut or backflush, allowing improved reliability, significant analysis time and hardware cost savings. Using argon as the carrier and discharge gas, limits of detection below 1 ppb were reached. The use of helium can now be limited to highly specific applications that call for limit of detection in the low-ppt range.

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AN-13 - PLSV - Pressure drop and dead volume : PLSV against Diaphragm valve

The PLSV valve technology was compared against an AFP ELDV-2 Diaphragm valve for the measurement
of VOCs using a gas chromatograh/Mass-Spectrometer instrument. The third-party test demonstrates
the benefit of the PLSV technology against the diaphragm valve in regards to pressure drop and dead
volume.

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Liplok: An Improved Instrumentation Industrial Compression Fitting

This detailed document highlights the benefits of our LipLok technology.

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Purification Technology

Brochure_iPaps_Digital

Brochure iPaps Digital

 

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Product Sheet ASDPure Digital

 

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Chromatographic Columns

Brochure_ArDSieve

Brochure ArDSieve

Separating argon and oxygen in chromatography has always been difficult as both molecules coelute unless operated at cryogenic temperature using expensive setup. This is even more true when trace ppb argon need to be separated from pure oxygen. This is a story of the past with the ArDSieve column

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OEM Chromatographic platform

N2Sense Brochure 

 

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About ASDevices

Our Roots

Our Roots

A discussion with Yves Gamache. The story of an inventor who is passionate about revolutionising gas analysis

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