Description
Injector – Quartz – 1.5mm – 750-21
P/N: 750-21
Cross Reference(s)
Spectro P/N: 48105008
Instrument Compatibility:
Spectro Modula, CIROS, Genesis, & ARCOS
Detail:
Quartz Injector, 1.5mm, Standard
In an ICP system, a “quartz injector” refers to the small, inner tube made of quartz that is part of the plasma torch. It is responsible for delivering the sample aerosol (a fine mist of the sample) directly into the center of the plasma where it gets atomized and ionized for analysis. Essentially, this tube “injects” the sample into the hot plasma.
Key points about the quartz injector:
Function:
It acts as a conduit to precisely introduce the sample aerosol into the plasma, ensuring efficient analysis.
Material:
Typically made of quartz due to its high heat resistance, but other materials like sapphire may be used for samples containing aggressive chemicals like hydrofluoric acid.
Part of the Torch:
The Quartz Injector is one of three concentric tubes within the ICP torch. The other tubes provide gas flows to maintain the plasma.
The Quartz Injector plays a crucial role in ICP systems. Here’s why it’s important, and some different types and benefits.
Importance of the Quartz Injector in ICP
The Quartz Injector is responsible for introducing the sample aerosol into the plasma. This is a critical step because it ensures that the sample is efficiently ionized, which is necessary for accurate and precise elemental analysis. Quartz is often used because it can withstand the high temperatures of the plasma. Plus, it’s chemically inert to most samples.
Types of Injectors
There are several types of injectors used in ICP systems, each with its benefits:
- Quartz Injectors:
- Economical: Quartz injectors are generally the most cost-effective option.
- Versatile: Suitable for a wide range of non-HF aqueous applications.
- Sizes: Available in various internal diameters (e.g., 0.8 mm, 1.4 mm, 1.8 mm, 2.4 mm) to accommodate different sample types.
- Alumina (Ceramic) Injectors:
- Durability: Typically have a longer lifespan than quartz injectors.
- Chemical Resistance: Ideal for samples containing hydrofluoric acid (HF) or high concentrations of alkali metals.
- Ease of Cleaning: Easier to clean and maintain, especially with challenging matrices.
- Sapphire Injectors:
- High Purity: Provide very low background signals, which is beneficial for trace element analysis.
- Robustness: Extremely durable and resistant to chemical attack.
Benefits of Using Quartz Injectors
- High-Temperature Resistance: Quartz can withstand the extreme temperatures of the plasma, ensuring consistent performance.
- Chemical Inertness: Quartz does not react with most samples, preventing contamination and ensuring accurate results.
- Cost-Effective: While there are more durable options, quartz injectors offer a good balance of performance and cost.
Using the right type of injector for your specific application can significantly enhance the performance and longevity of your ICP system.
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