What detector is used in ICP-MS?
What detector is used in ICP-MS?
electron multiplier
The most common detector used for ICP-MS is an electron multiplier (EM). Positively-charged analyte ions strike the first dynode of the detector which is held at a high negative voltage.
How does ICP-MS detector work?
Mass Spectrometer (MS) separates the ions out by their mass-to-charge ratio after going through the ICP, and the detector counts the number of selected ions per second which allows the instrument to determine the concentration of each chosen element.
Which detector is used in ICP-OES?
Detectors. Historically, light intensity was measured with photomultiplier technology. Currently, solid-state charge transfer devices (CTDs) are the detectors of choice for ICP-OES and have almost completely replaced photomultiplier tubes.
What elements can ICP detect?
Elements Analyzed During an ICP Test Scan
| Aluminum | Antimony | Barium |
|---|---|---|
| Calcium | Cerium | Chromium |
| Erbium | Europium | Gallium |
| Holmium | Indium | Iron |
| Lutetium | Magnesium | Mercury |
Why argon is used in ICP-MS?
Argon gas dilution significantly improves plasma robustness allowing the direct analysis of high matrix samples such as undiluted seawater using the iCAP Q ICP-MS. Optimum performance for high IP analytes in such samples is only possible however, after online addition of water vapor and carbon.
How many elements can ICP-MS detect?
Basic Instrumentation and Operation
| ICP-MS | AES | |
|---|---|---|
| Throughput | 20-30 elements per minute | 10-40 elements per minute |
| Isotope detection | Yes | No |
| Cost | ~$150,000 | ~$50,000 |
| Multi-element detection | Yes | Yes |
Why argon is used in ICP?
Inductively coupled plasma (ICP) reaches much higher temperatures than a combustion flame (>8000 K). Argon plasmas are conventionally used to provide a high-temperature, high-stability excitation source in ICPAES.
What is the difference between ICP-MS and ICP-OES?
But in general, ICP-OES is used to measure contaminants for environmental safety assessment and elements with a higher regulatory limit. ICP-MS, on the other hand, is especially useful for analyzing samples with low regulatory limits. In addition, ICP-OES has much higher tolerance for TDS (up to 30%).
Why is argon used in ICP?
What is the detection limit of ICP?
Detection limits in solids range from <1 ppm to >100 ppm (comparable to detection limits of <0.010 ppm to >1 ppm in a 1% wt/wt solution of a digested solid sample).
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