Description
Torch 1 Slot DV 310-14
P/N: 310-14
Cross Reference(s)
Glass Expansion: 30-807-0017
Meinhard: ML131014
PerkinElmer: N0691662
4060-010051
Instrument Compatibility:
PerkinElmer Optima 3X00 DV
Torch Detail:
This is an exact match OEM replacement quartz torch for PerkinElmer Optima 3X00 DV (Dual View) series ICP-OES instruments.
This torch has a single viewing slot, but is also available in a 2 slot torch (Precision Glassblowing Part#: 310-12) and 3 slot torch (Precision Part#: 310-14/3SL). The torch does not include an injector or injector supports. Precision Glassblowing offers plastic injector support adapters and injectors of various sizes in both quartz and alumina.
What is the Role of the ICP Torch?
A plasma is an ionized gas, consisting of positively charged ions and free (unbound) electrons. The role of the plasma (ICP) in ICP-MS is to ionize the sample. In contrast to so-called ‘soft’ ionization sources in other forms of mass spectrometry, the ICP is a ‘hard’ ionization technique because it completely atomizes most molecules in the sample.
ICP-MS instruments use an argon plasma, although helium plasma is also an option. Although there are several advantages to using helium, argon is the gas of choice since the cost of helium is prohibitive.
What Makes the Torch Work?
Plasma forms at the end of three concentric quartz tubes, collectively known as the torch. Argon gas flows through all three tubes.
- The inner tube is the injector and contains the sample aerosol in a stream of argon that delivers the sample to the plasma.
- Concentric to this tube is another tube of argon. This is the auxiliary gas that forms the plasma.
- The outer argon tube is a cooling layer to prevent the torch from melting.
- The far end of the torch has a copper induction coil (or ‘load coil’) surrounding it that connects to a radio frequency (RF) generator.
How the ICP Torch Ionizes a Sample
The RF generator supplies power to the load coil, creating a high-frequency alternating current. This, in turn, induces a time-varying electromagnetic field in the torch. As a result, with argon gas flowing through the torch, the application of a high-voltage discharge (called a Tesla spark) ionizes a fraction of the argon atoms generating ions and electrons.
The electromagnetic field in the torch then acts on the ions and electrons. As a result, they accelerate and collide with other argon atoms. If these collisions impart enough energy, additional atoms ionize creating electrons and ions that propagate the cascade.
As a result, the movement of electrons and ions in the torch generates tremendous heat. The result is an ICP, which reaches a temperature of up to 10,000 Kelvin (hotter than the surface of the sun).
What Is PFA Inert?
PFA is frequently employed as an inert substance in sample equipment on geochemical or environmental analytical chemistry field sites to assist in avoiding trace amounts of metallic ion contamination.
Features of Torch 1 Slot DV 310-14.
Single-Slot Torch
A single-slot ICP torch is a standard torch for aqueous solutions in ICP-OES (optical emission spectrometry) instruments. ICP-OES is a technique that uses plasma and a spectrometer to determine the composition of elements in samples, usually dissolved in water.
Single-slot torches are made of one-piece quartz tubing for plasma and auxiliary gas flow. They can be demountable and require regular maintenance and replacement, especially when working with aggressive samples like hydrofluoric acid, organic solvents, or samples with high total dissolved solids.
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