Authors: Wacaw Janicki¹; Wojciech Chrzanowski²; Pawe wan³; Jacek Namienik¹

Source: Journal of Automated Methods & Management in Chemistry, Volume 25, Number 6, November-December 2003 , pp. 141-147(7)

Publisher: Taylor and Francis Ltd

Abstract:

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.

Document Type: Research article

DOI: http://dx.doi.org/10.1080/14639240410001723355

Affiliations: 1: Department of Analytical Chemistry Telecommunication and Informatics Gdask University of Technology 11/12 Narutowicza Street PL-80-952 Gdask Poland sk University of Technology 11/12 Narutowicza Street PL-80-952 Gdask Poland "> 2: Department of Physical Chemistry Chemical Faculty Telecommunication and Informatics Gdask University of Technology 11/12 Narutowicza Street PL-80-952 Gdask Poland sk University of Technology 11/12 Narutowicza Street PL-80-952 Gdask Poland "> 3: Faculty of Electronics Telecommunication and Informatics Gdask University of Technology 11/12 Narutowicza Street PL-80-952 Gdask Polandsk University of Technology 11/12 Narutowicza Street PL-80-952 Gdask Poland">

Publication date: 2003-11-01

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