Description
Crossflow Argon Inlet Fitting 520-38
P/N: 520-38
Cross Reference(s)
None Available
Detail
- Replacement Argon Inlet Fitting for Crossflow Nebulizer
- Fits PN 500-92 and 500-92S
A Crossflow Argon Inlet Fitting refers to the specific design of the nebulizer in the Inductively Coupled Plasma (ICP) system. The particular concern is how the sample and argon gas interact. In a crossflow nebulizer, the argon gas stream is directed at right angles to the tip of the sample capillary tube. This is in contrast to concentric nebulizers, where the gas flow is parallel to the capillary.
The Role of the Crossflow Argon Inlet Fitting
Crossflow nebulizers play a crucial role in ICP analysis due to their robust nature and versatility, especially when handling certain types of samples. Here’s why they are important:
- Sample Introduction: The primary function of any nebulizer in ICP is to convert the liquid sample into a fine aerosol that can be introduced into the plasma for analysis. The crossflow design achieves this by utilizing a high-velocity argon gas stream impacting the liquid sample stream, causing it to break up into a mist.
- Ruggedness and Clog Resistance: Crossflow nebulizers are generally considered more rugged than concentric nebulizers, especially when dealing with samples containing higher concentrations of dissolved solids (high TDS) or particulates. Their design, with a larger diameter liquid capillary and a longer distance between the liquid and gas injectors, helps to reduce clogging issues. This robustness makes them suitable for routine analysis of samples that might otherwise cause problems for more sensitive nebulizer designs.
- Versatility: Crossflow nebulizers are versatile and can handle a variety of sample types, including strong mineral acids (like HF) and samples with moderate levels of dissolved solids (typically less than 5%, though some can handle higher). They have found wide use in diverse fields like environmental monitoring, pharmaceuticals, and food safety.
Crossflow nebulizers aren’t as efficient as concentric nebulizers in creating the smallest droplets. However, some analysts find the trade-off in sensitivity and precision to be acceptable. That is because of the improved ruggedness and reduced clogging problems. This is especially true for routine use with challenging sample matrices.
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