The new Portable Coulometric Analyser PCA is designed for laboratory and field analysis of heavy metals, semi-metals and numerous non-metals in aquatic solutions for a broad concentration range addressing contents from sub-μg/L up to several g/L. In battery operation mode it is well suited for field applications.
The analysis is full automatic, the sample solution is transported to the electrochemical measuring cell by means of a small but robust peristaltic pump and on completing the analysis the result is displayed and stored in the memory. The human interface is a simple touch screen.
Typical applications include: Ag, Ammonia, As, Bromate, Bromide, Cd, Chloride, Chlorite, Co, Cr(VI), Cu,EDTA, Fe, Hg, Iodide, Mn, Ni, Nitrite, Pb, Sb, Se, Sn, Sulphide, Tl, Zn
APPLICATION FIELDS
Samples with suspended particles and solid samples can be analysed after an appropriate sample digestion, e.g. thermal, UV or microwave-assisted sample digestion.
Ag, Ammonia, As, Bromate, Bromide, Cd, Chloride, Chlorite, Co, Cr(VI), Cu,
EDTA, Fe, Hg, Iodide, Mn, Ni, Nitrite, Pb, Sb, Se, Sn, Sulphide, Tl, Zn
The analysis is based on automatic flow-through coulometry and voltammetry making use of a unique robust electrochemical measuring cell with a maintenance-free built-in reference and auxiliary electrodes and a long-life disposable working electrode. The sample solution is pumped into the cell where the determined species (analyte) is measured through its electrochemical conversion, i.e. it is electrochemically oxidised or reduced at the electrode surface. Low concentrations are determined after a preliminary electrochemical deposition of the measured species at the electrode surface (enrichment step),
then the deposit is stripped by constant current while the signal is recorded and evaluated. In such a way, concentrations in the sub- μg/L level can be easily measured. A typical response of copper displayed on the touchscreen is depicted below.
The analytical procedure consists of three main steps:
Enclosure: The PCA instrument is integrated into a robust transport case made of polypropylene. Watertight, crushproof, and dustproof. Protection class IP 67 | |
Dimensions (W x D x H): 27 x 24.6 x 12.4 cm (10.62” x 9.68” x 4.87”) | Weight: 2.9 kg (6.4 lbs) |
Power input: 100-240V/50-60Hz | Battery: Ni-MH, 14.4V/4.5Ah |
Ambient operating conditions: 5 °C – 45 °C at 5 – 95% relative humidity non-condensing (41 °F – 113 °F) |