Analysis for Arsine and Phosphine


Qa3 prepares bespoke solid phase sorbent traps through which gas from a process line can be passed, trapping all species selectively. These traps are then returned to the UK for analysis by ICP-OES and/or ICP-MS for total arsenic /phosphorus species (expressed as total arsine and total phosphine respectively). The achievable LOD is directly proportional to the volume of gas sampled. Typically 20 L of gas can achieve an LOD of ~2 – 5 µg/m3.


If required, arsine speciation can also be carried out to determine arsine and alkyl arsines, including dimethyl arsine and trimethyl arsine. The determination of arsine in gas is usually carried out in conjunction with the quantification of total arsenic in the associated fluid (condensate, oil or water). Thus, stabilised fluid samples are generally returned to the UK for analysis together with the sorbent traps. Arsenic speciation of condensates is also possible.

NORM Determination of Liquids and Solids

High resolution gamma spectrometric analysis is performed using Canberra High-Purity Germanium (HPGe) detectors. Detectors are calibrated against a mixed radionuclide standard solution. The standard is used to prepare a source of identical geometry to that of the samples. Gamma spectra are analysed and individual radionuclides quantified using Fitzpeaks spectral deconvolution software (JF Computing Services). All anthropogenic gamma emitting radionuclides detected will be reported together with a suite of NORM (e.g. 210Po, 210Pb, 212Pb, 214Pb, 226Ra and 228Ra).  This method is suitable for liquid (aqueous and organic) and solid samples.

For gamma ray spectroscopy the limit of detection achievable is 0.04 Bq/g

Comprehensive Water Characterisation7410486_s

  • As a ‘standard suite’ Qaoffer the following services:
  • pH by pH electrode
  • Density by density meter at quoted temperature
  • Resistivity at quoted temperature (via sub-contract)
  • Sulphate, bromide, nitrate and iodide, by ion chromatography
  • Organic acid anions (C1-C5)
  • (VFA) and carbonate species by ion exclusion
  • Cations and elements (Ba, Sr, Ca, Mg, Na, K, Fe, Cu, Zn, Mn, Al, B, S, P, Si and Li) by ICP
  • Total iron and total barium by acidification followed by ICP        
  • TDS (calculated)

Determinations of heavy Metals in Oil and Water

Corrosion Investigations

If you would like further information on any of the above services, please do not hesitate to contact by phone or email or via the enquiries form (via the below link)..

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