Argon ionisation detector

Detection and Retention Time Argon ionisation detector or flame ionisation detector. Rt 1.44 relative to codeine. 

Zielinski, E. Use of argon ionisation detector with <3Ni source for chromatographic determination of hydrogen sulphide, sulfur dioxide and carbon oxy-sulfide. Chem. Anal. 14, 521 (1969). - Z. Anal. Chem. 254, 378 (1971). 

Hill, D. W., Newell, H. A. The variation with polarising voltage of the response to methane, carbon dioxide and nitrous oxide of a macro-argon ionisation detector for gas chromatography. J. Chromatog. 32, 737 (1968). 

Sporek, K. F. New type of argon ionisation, helium electron capture detector for gas chromatography. US-At. Energy Comm. Rpt. Conf-650, 809 (1966). — Anal. Abstr. 14, 3715 (1967). 

An argon ionisation detector to the gas-liquid chromatography of organosilicon compounds452 was unsuitable for the analysis of methylchlorosilanes. However, a pyrolysis chamber permitted the analysis of both linear and cross-linked methylsiloxane polymers of high molecular weight. 

Photoionisation detector, PID component molecules in the detector are ionised by photons from a high energy ultraviolet source, selectivity can be achieved by using a different source, e.g. 10.2eV low energy krypton lamp for aromatics and alkenes, 11.7eV argon lamp for alkanes, halogenated compounds as well as aromatics. Sensitivity is similar to a FID, 10 to 10- 2gs-. ... 

Plasmas compare favourably with both the chemical combustion flame and the electrothermal atomiser with respect to the efficiency of the excitation of elements. The higher temperatures obtained in the plasma result in increased sensitivity, and a large number of elements can be efficiently determined. Common plasma sources are essentially He MIP, Ar MIP and Ar ICP. Helium has a much higher ionisation potential than argon (24.5 eV vs. 15.8 eV), and thus is a more efficient ionisation source for many nonmetals, thereby resulting in improved sensitivity. Both ICPs and He MIPs are utilised as emission detectors for GC. Plasma-source mass spectrometry offers selective detection with excellent sensitivity. When coupled to chromatographic techniques such as GC, SFC or HPLC, it provides a method for elemental speciation. Plasma-source detection in GC is dominated by GC-MIP-AES... 

Product analysis was carried out using a Hewlett-Packard 5890II gas chromatograph, fitted with both a thermal conductivity detector, and a methanator/flame ionisation detector. Separation of the products was achieved using a 3m Porapak Q packed column, with argon carrier gas. Reference data and pure component injections were used to identify the major peaks, and response factors for the products and reactants were determined and taken into account in the calculation of the conversion and product distribution. In all cases stoichiometric gas mixtures were used and carbon balances were better than 97%. Conversions and yields were calculated as follows ... 

Vyakhirev and Chereshnya studied the gas chromatographic behaviour of tetramethyl-, ethyl-, and butyl-tin with the use of eight stationary phases and five supports. The dependence of the HETP value on the flow rate of carrier gas was investigated, and the rectilinear dependence of the log of the retention volume on the inverse of the column temperature and on the number of carbon atoms in the molecule was established. The best separation of the above substances was attained on a column (1.2 metres x 4 mm) packed with silicone E-301 or Apiezon L on INZ-600 brick (calcined at lOOO C) or on Spherochrom-1 and operated at 135 C with argon (18 ml per min.) as carrier gas and a 3-ionisation detector. 

---