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Central Analytical Facilities
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Metrohm IC 930 Ion chromatography system 

Instrument details (from left to right):

The Ion Chromatography instrument includes a Metrohm 858 Autosampler with 127 positions for sample introduction. It also offers options for inline autodilution and ultrafiltration of samples prior to analysis.

The anions are quantified using a Metrohm IC 930 compact IC Flex Oven/SeS/PP/Deg, which is equipped with a column oven, MSC and MSM module for sequential suppression, a peristaltic pump for suppressor regeneration and a built-in degasser. Detection and quantification of anions can be achieved using either a conductivity detector and/or an UV/VIS detector.

The cation are analysed using a Metrohm IC 930 compact IC Flex Oven/Deg equipped with a column oven and a built-in degasser.  The cations are quantified using a Conductivity detector. 

 

Typical applications include water chemistry analysis:

  1. Quantification of anions and cations to evaluate quality of drinking water?

  • GLA431-Triple liquid water isotope analyser from Los Gators Research (LGR)

    Instrument Details

    The Triple Liquid-Water Isotope Analyzer (T-LWIA) equipment uses High Resolution Laser Absorption Spectroscopy technique and simultaneously measures stable isotopes ratios, such as, Deuterium/Hydrogen (2H/H), 17Oxygen/16Oxygen (17O/16O) and 18Oxygen/16Oxygen (18O/16O) in liquid water samples with and electric conductivity of less than 2 00?0 (?S/cm) and a TDS <1 200 (mg/l).

    It follows the Beer Lamberts' Law and computes isotopic ratios in terms of absorbance (LGR, 2009). The instrument is equipped with an auto sampler and vaporizer module to introduce the sample into the system.  This facilitates continuous stable isotope monitoring with minimal user involvement, thus, provides faster and timely generation of results compared to the conventional instrument. The instrument makes use of Off-Axis integrated cavity output spectroscopy to simultaneously measure δ17O, δ18O and δ2H in water samples. 

     Typical applications which are possible by measuring O/H stable isotopes

    • Tracking water through the water cycle, from rain to rivers to dams/lakes and groundwater.
    • Determining water provenance in products – e.g., where is the water in beverages derived from?
    • Ecosystem functions – e.g., which plants are dependent on rain and which on groundwater?
    • Domestic water supply – e.g., where does my tap water come from and how does it change?
    • Climate change studies – the rain in different climates has different isotopic signatures!

    Lab Performance

    Our lab's current QA/QC reports that precision and uncertainties are well below the acceptable ranges for hydrological studies which are:

    • δ18O – precision and accuracy = ±0.2 ‰

    • δ2H – precision and accuracy = ±1.5 ‰

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Elementar Vario TOC cube

Instrument details

The TOC analyser is equipped with a high temperature catalytic combustion oven, which can heat up to 1200°C. The system can be operated both in liquid and solid mode and it has an autosampler for the analysis of 50 liquid samples and 80 solid samples.  The instrument is equipped with a NDIR (non-dispersive infrared) and EC (electrochemical) detector for quantification of CO2 and NO gas.  The instrument can be used to quantify the following parameters in:

Liquid mode

  • Total carbon (TC)
  • Total inorganic carbon (TIC)
  • Total organic carbon (TOC)
  • Non-purgeable organic carbon (NPOC)
  • Total bound nitrogen (TNb)

Types of samples that can be analyzed:

Drinking water, surface and groundwater, precipitation, wastewater, seawater

Solid mode

  • Total carbon (TC)
  • Total inorganic carbon (TIC)
  • Total organic carbon (TOC)

?Types of samples:

Sediment, soil

Typical applications include water chemistry analysis:

  • measure organic pollution of water samples
  • validation of cleaning processes

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Skalar Blue Vision discrete analyser

Instrument details

The BluVision? discrete analyser has 100 sample positions and 32 positions for reagents, standards an?d QC's. The sample and reagent racks are cooled during the analysis run.  The robotic arm allows for the sample and reagent to be dispensed automatically into the cuvettes. The system has a cuvette tray for 160 test positions and this chamber is temperature controlled. The cuvettes are automatically loaded into the cuvette tray by an autoloader. The autoloader holds an additional 48 cuvette blocks, allowing a total of 640 tests. The detector is equipped with a halogen light source and a filter wheel containing 8 filters with different wavelengths. The filters can be exchanged for analysis of various parameters.?

Applications include the quantification of:

  • Alkalinity
  • Total Hardness
  • Colour
  • Anions including NO2, NO3, PO4
  • Additional parameters will be added

Types of samples

  • Surface water
  • Groundwater
  • Rainfall
  • Seawater
  • Effluent/wastewater
  • Acid mine drainage

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Elementar Vario Isotope select elemental analyser and Isoprime precision Isotope ration mass spectrometer (EA-IRMS)??

Instrument details

The EA analyser is equipped with a high temperature catalytic combustion oven, which can heat up to 1200°C and introduces oxygen with jet-injection at the point of combustion. The EA system is equipped with a 120 position autosampler and can be used for the analysis of solid samples.  The EA is interfaced with an IRMS precision instrument for the quantification of carbon and nitrogen stable isotope ratios.

?Applications include the quantification of:

-         δ15N stable isotope ratio

-         δ13C stable isotope ratio

-         %C (Elemental data)

-         %N (Elemental data)

Types of samples that can be analyzed:

·        Soils and sediments

·        Plant material

·        Food and beverages including alcohols.??


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