INDUCTIVELY COUPLE PLASMA OPTICAL EMISSION ESPECTROSCOPY Research Technical Services
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Research Technical Services
INDUCTIVELY COUPLE PLASMA OPTICAL EMISSION ESPECTROSCOPY
In the Inductively coupled plasma optical emission spectroscopy (ICP-OES), a large amount of elements of the periodic table can be quantified at trace and ultratrace concentration levels.
The liquid sample is transported through the tubing connections with a peristaltic pump. When the liquid reaches the nebulizer system it becomes an aerosol thanks to the action of gas argon. The aerosol is conducted to ionization zone that consists in a plasma generated when subjecting a flow of gas argon to the action of an oscillating magnetic field induced by a current of high frequency. Inside the plasma temperature reaches to 8000ºK. Inside the plasma, atoms of the sample are excited and ionized. When this excited atoms decay back to its ground state an electromagnetic radiation is emitted . This emission is the analyzed by an optical system separating the radiation by its wavelength. Then the detector quantifies the intensity giving the concentration of each element o f the sample.
An ICP-OES device can detect and quantify the majority of the elements of the periodic table, being able to analyze a wide range of samples.
- Agriculture and foods
- Determination of metals and contaminants in soils, pesticides, vegetal matters, foods, etc.
- Clinical analysis
- Determination of toxic elements in urine, blood, animal tissue, breast milk.
- Determination of the origin of sediments and rocks by means of its composition.
- Evaluation of the pollution of soils.
- Determination of metals in continental water, drinking water, waste water and sea water.
- Inductively coupled plasma optical emission spectroscopy. Perkin Elmer. Optima 4300DV (Dual vision).
- Inductively coupled plasma optical emission spectroscopy. Perkin Elmer. Optima 7400DV (Dual vision).
Optima 4300DV and Optima 7300DV introduce axial vision that provides better limits of detection by increasing optical path. The radial vision together with the axial vision (Dual vision) extends the linear dynamic range.
Accesories and gases
Both instruments have autosampler for the introduction of the liquid samples.
An ultrasonic nebulizer (Cetac model Or5000AT+), is available to improve the limits of detection. It has the possibility to be conected to any of the instruments.
Both instruments use argon, nitrogen and compressed air
- Samples have to deliver properly labelled, packed and conditioned to ensure his identification, integrity and conservation during the transport and guarantee the security of the personnel that realises it.
- The samples will be provided in aqueous solution, aciduladas 2%, well covered and filtered to 0 with HNO3. 45µm.
- Samples containing hydrofluoric acid, which is may damage internal parts of the equipment will not be accepted.
- When required the analysis of samples with complex matrix should be given in the form of @LIMS. The head of the team will decide if the analysis is carried out or not.
- The form @LIMS shall show as much data as possible concerning the sample (matrix different from HNO3 2%, high concentration of any element or compound that might interfere in the analysis, extreme pH and high content of dissolved solids, etc.)
- The total dissolved solids (TDS) content shall not exceed 2000 ppm.
- Samples to be analyzed will be delivered in 10 or 50 ml consecutively numbered tubes. Avoid complicated markings that may lead to confusion.