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An open channel scrubber is proposed as a miniature fieldable gas collector. The device is 100mm in length, 26mm in width and 22mm in thickness. The channel bottom is rendered hydrophilic and liquid flows as a thin layer on the bottom. Air sample flows atop the appropriately chosen flowing liquid film and analyte molecules are absorbed into the liquid. There is no membrane at the air–liquid interface:...
An electroosmotically pumped capillary format sequential injection analysis system with a membrane sampling interface for determination of gaseous analytes is introduced. The applicability of the system has been demonstrated by the determination of ammonia at the parts per billion level. The effects of varying the relevant experimental conditions are also reported.
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