How do you analyze ICP-OES data?

How do you analyze ICP-OES data?

How do you analyze ICP-OES data and what does it tell you? General guidelines for analysis of ICP-OES data are to look at the intensity of light emitted at particular wavelengths and compare that to calibration data to determine the concentration of atoms that are emitted at that particular wavelength.

How does ICP-OES spectroscopy work?

In the ICP-OES the plasma is generated at the end of a quarts torch by a cooled induction coil through which a high frequency alternate current flows. As a consequence, an alternate magnetic field is induced which accelerated electrons into a circular trajectory.

What is an ICP-OES used for?

ICP-OES can handle geological, mining and rare earth elements. ICP-OES is widely used in mining processes, mining purity control, rocks analysis, etc. Many mines use ICP-OES to check for the purity of the extracted ores of manganese, nickel or precious metals.

How is ICP-OES done?

To generate plasma, first, argon gas is supplied to torch coil, and high frequency electric current is applied to the work coil at the tip of the torch tube. Using the electromagnetic field created in the torch tube by the high frequency current, argon gas is ionized and plasma is generated.

What elements can ICP-OES detect?

Detection limits. Elements including As, P, Rb, Se, and S have detection limits of a few part per billion (ppb, ng/mL). Detection limits for F, Cl, and Br are typically in the hundreds of ppb (ng/mL) or more unless the spectrometer can measure lines below about 150 nm.

How are samples prepared for ICP-OES?

The samples are usually made up in 2% w/v Nitric Acid (TraceMetal Grade from Fisher Sci, Cat#A509-500) prepared with 18 M Ohm D.I Water. If 1 or 2 mls of sample are to be diluted then the stock solution of 2 % w/v Nitric Acid may be used.

Why is argon gas used in ICP-OES?

Argon is important for OES Spectrometers analyzing light elements such as Carbon, Phosphorous, Sulfur, and Nitrogen. These elements are below 200 nanometers (nm) in wavelength and the argon allows the optic of a spectrometer to see from 200 and below.

What is ICP method?

ICP (Inductively Coupled Plasma) Spectroscopy is an analytical technique used to measure and identify elements within a sample matrix based on the ionization of the elements withing the sample.

How much sample do you need for ICP-OES?

We need at least 5-10 ml for the analysis. If you have less sample volume we need to dilute the sample (increase of the determination limit!). If you have solid samples please provide at least 1 g (fine powder or chips).

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 is ICP technique?

What are the components of ICP-OES?

An ICP-OES instrument consists of four basic components: the sample introduction system, excitation source (plasma), spectrometer (for wavelength selection), and detector (Figure 1).

What elements can ICP-OES measure?

Metals such as Fe, Pb, and Cu are measured by ICP-OES in the same way as nonmetals like Cl, Br, I, S, and P. The main steps in ICP metal analysis are: The elemental metals to be measured in the sample to be are selected. For example, iron (Fe), lead (Pb) and copper (Cu).

How many elements can ICP-OES detect?

The constituents of an unknown sample can then be identified and measured. ICP-MS offers extremely high sensitivity to a wide range of elements. Bulk chemical analysis technique that can determine simultaneously up to 70 elements in a single sample analysis.

What is the difference between ICP-OES and ICP-MS?

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%).

What metals can ICP-OES detect?

Elements that emit brightly, including Be, Mg, Ca, Sr, and Ba, have detection limits of tens of parts per trillion (pg/mL) or below. A desolvation system following a heated spray chamber or ultrasonic nebulizer can further improve detection limits by ~10x.