André A Bell

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The mapping of incident irradiance to sensor output value, the so-called camera transfer function (CTF), of CCD or CMOS imaging devices is in general a non-linear function. Applications that utilize the camera as a measurement device for the incident irradiance, e.g DNA image cytometry for early cancer detection or HDR imaging, require a linear CTF. Thus,(More)
The coulometric method presented here is a reliable method for the direct analysis of CO2/air cylinder gas mixtures. It is based on Faraday's laws of electrolysis and therefore no external standardization is required. A series of CO2/air cylinder gas mixtures ranging in concentration from 300 to 375 µmol/mol (ppm) were analyzed and the results compared to(More)
Coulometry has been established as an important and reliable method for the determination of acidic compounds. The analytical method and simple apparatus described here arc applied to the precise and accurate determination of sulfur dioxide in nitrogen, specifically in compressed gas cylinders at nominal concentrations of 50 and 100 µmol/mol (ppm). This(More)
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