Table of Contents
What is the role of a torch in an ICP OES instrument?
In ICP mass spectrometry (ICP-MS), an inductively coupled argon plasma torch is used to atomize and ionize a sample, which is usually introduced as an aerosol or by means of laser ablation.
Can ICP be used for AAS?
An application field of ICP—AAS is the analysis of complex compounds that are difficult to dissociate into atoms using flames. In these determinations, a high sensitivity is generally not needed but a good selectivity is important.
Why is ICP so sensitive?
ICP-MS sensitivity as per atomic number is influenced by the sample argon flow rate (higher flows generally cause higher sensitivity for the lower atomic numbers) and the settings on the ion optics. Even though the voltages may be the same, the optics will change with time and need to be optimized on a regular basis.
How plasma is formed in ICP torch?
An inductively coupled plasma can be generated by directing the energy of a radio frequency generator into a suitable gas, usually ICP argon. This generates enough energy to ionize more argon atoms by collision excitation. The electrons generated in the magnetic field are accelerated perpendicularly to the torch.
What is the difference between ICP-OES and ICP AES?
Difference – ICP OES vs ICP AES The term ICP OES refers to Inductively Coupled Plasma Optical Emission Spectrometry. The term ICP AES refers to Inductively Coupled Plasma Atomic Emission Spectrometry. This name is given because the technique is done by exciting atoms present in the sample that is going to be analyzed.
What are the major differences between the AAS ICP-OES and the flame photometer?
Flame atomic absorption is less sensitive than ICP-OES and it can achieve detection limits in the mg/L range. Only furnace atomic absorption can compete with the detection limits obtained with ICP-OES, but analysis time is much more important, up to 10 minutes per sample and per element.
What is difference between ICP-OES and ICP AES?
The term ICP AES refers to Inductively Coupled Plasma Atomic Emission Spectrometry. This name is given because the technique is done by exciting atoms present in the sample that is going to be analyzed. There is no difference between ICP OES and ICP AES since they are two names for the same technique.
Why is ICP-MS more sensitive than ICP-OES?
ICP-MS provides the added bonus of being able to detect the ions themselves rather than just the photons (-OES and -AES), as ICP-MS mates the plasma coupling technology with mass spectrometry. The markedly higher sensitivity of ICP-MS allows for detection limits in the parts per trillion (ppt) range.