Automated analyser for monitoring trace amounts of volatile chloro‐organic compounds in recirculated industrial water

Janicki, W.; Chrzanowski, Wojciech; Wasik, Andrzej; Przyk, E.; Namieśnik, Jacek

doi:10.1155/s1463924602000020

Cited by 2 publications

(2 citation statements)

References 2 publications

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“…Among the most important are: a pump (model TD-2LA; Brailsford & Co, Rye, NY, USA; 2 litres min À1 at 0.07 MPa pressure), chosen for its robustness and a two-stage sample drier (freezing þ permeation through a Nafion Õ tubing wall to the receiving hygroscopic agent-5A molecular sieve) [2]. Sample directly from the pump is split into two streams, with flows adjustable by means of needle valves V2 (THC line) and V3 (GC line).…”

Section: Operating Principlementioning

confidence: 99%

“…These features lead to the development of a subdiscipline of analytical chemistry, known as process analysis. Instruments employed in process analysis are usually not big, universal, expensive combines like those used in specialized analytical laboratories, but dedicated instruments, frequently customer tailored, and they are also known as 'fit-for-purpose' devices [1][2][3].…”

Section: Introductionmentioning

confidence: 99%

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Automated analyser for monitoring the contents of hydrocarbons in gas emitted from exploratory bore-holes in the gas and oil industry

Janicki¹,

Chrzanowski²,

Zwan³

et al. 2003

Journal of Automated Methods & Management in Chemistry

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An automated analyser for total hydrocarbon contents and hydrocarbon composition (from methane to pentanes) was constructed and tested in both laboratory and field exploitation. It used two-channel analysis: continuous measurements of total hydrocarbon contents and periodic (90 or 150 s) composition analysis after separation of hydrocarbons on a gas chromatographic column. Flame ionization detectors were used in both channels. A simple 16-bit analogue-to-digital converter was used (4.8, practically four orders of magnitude), while the full measuring range (six orders of magnitude) was ensured by automatic dilution of the sample (or standard) with clean air. Full control of the operating (calibration/analyses) cycle was performed by microcomputer. An external programme, based on a computer provided with full information on the instrument operating conditions, presents the results of calibrations/analyses and enables them to be archived in a standard database used in the oil/gas drilling industry (N-LAB) by providing a suitable link. The instrument measuring range was 1 ppm to 100% with precision not worse than 5% at the detection limit. The analyser can operate autonomously for two months, recalibrating itself daily.

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Section: Operating Principlementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%