AAS (Atomic Absorbtion Spectrophotometry)
This technique is similar to ICP in that a diluted sample of the solution to be analysed is aspirated into a flame (rather than a plasma). A lamp containing the element to be measured produces characteristic radiation which is directed through the flame. Ions in the flame absorb a portion of this radiation and this can be used to quantitatively analyse components of the sample.
IC (Ion Chromatography)
Here, the sample is injected into a column where a high pressure pump forces the sample through. The column is packed with a material having ion exchange properties. The ions present in solution move through this column at different rates, so become separated and emerge from the other end at different times. A conductivity sensor located here detects when the ions pass through. We can quantitatively measure sulphate, fluoride and other anions using this technique.
HPLC (High Pressure Liquid Chromatography)
Again, a sample is injected into a column, through which it is carried under high pressure using a suitable eluent. In this case, the column packing is designed to separate organic molecules. At the end of the column the detector senses UV absorbtion by the organic molecules when they pass through.
This technique can be used to detect some of the brightener components in nickel and acid zinc plating processes.
TOC (Total Organic Carbon)
With this technique, a sample is pyrolysed over a platinum catalyst. The carbon dioxide, produced by organic carbon in the sample, is quantitatively determined. This technique can be used to measure carbonate content of process solutions and in solutions such as acid zinc and nickel can give an indication of the levels of organic contamination in these processes.
In addition to these methods, we also have UV/Visible spectrometry, Gas chromatography (GC) and employ a wide range of wet analysis techniques. We have dedicated staff to carry out troubleshooting and conversions. We also offer a range of Corrosion testing and Surface Analysis services. For more information, see your local area representative, or contact our Technical Centre Manager (Dave Hawthorne).