What is the difference between a collision and a reaction cell in ICP-MS and what is their purpose?
Reaction mode uses specific reaction gases to remove known, reactive interferences from each analyte isotope. Collision mode uses a non-reactive gas and a process called kinetic energy discrimination (KED) to selectively attenuate all polyatomic interferences based on their size.
Is a collision cell a quadrupole?
The first quadrupole termed “Q1” can act as a mass filter and transmits a selected ion and accelerates it towards “Q2” which is termed a collision cell. The pressure in Q2 is higher and the ions collides with neutral gas in the collision cell and is fragmented by CID.
What is the purpose of collision reaction cell in quadrupole ICP-MS?
What is a collision cell? If you use quadrupole ICP-MS, the chances are you have encountered collision cell technology. This technology is used to remove interferences that are generated by the plasma gas and the sample constituents.
What is the principle of ICP-MS?
Inductively coupled plasma mass spectrometry (ICP-MS) is a type of mass spectrometry that uses an inductively coupled plasma to ionize the sample. It atomizes the sample and creates atomic and small polyatomic ions, which are then detected.
What is the purpose of a collision cell?
A collision/reaction cell is a device used in inductively coupled plasma mass spectrometry to remove interfering ions through ion/neutral reactions.
What is the difference between ICP-OES and ICP-MS?
ICP-OES is mainly used for samples with high total dissolved solids (TDS) or suspended solids and is, therefore, more robust for analyzing ground water, wastewater, soil, and solid waste. ICP-MS, on the other hand, is especially useful for analyzing samples with low regulatory limits.
What do you mean by electric quadrupole?
[i¦lek·trik ′kwä·drə‚pōl] (electricity) A charge distribution that produces an electric field equivalent to that produced by two electric dipoles whose dipole moments have the same magnitude but point in opposite directions and which are separated from each other by a small distance.
What is a collision gas?
The collision theory explains that gas-phase chemical reactions occur when molecules collide with sufficient kinetic energy. The collision theory is based on the kinetic theory of gases; therefore only dealing with gas-phase chemical reactions are dealt with. The reactions concerned are between only two molecules.
What is meant by successful collision?
A collision that produces a reaction is called a successful collision . The activation energy is the minimum amount of energy needed by particles for a collision to be successful. It is different for different reactions.
