Saturday , 20 July 2024

Inductively coupled plasma emission spectroscopy an overview

*M. Hari Krishna, G. Nagasowjanya, V. Uma Maheswara Rao
Department of Pharmaceutical Analysis and Quality Assurance, CMR College of Pharmacy, Medchal, Rangareddy, Hyderabad, India

Inductively coupled plasma/optical emission spectrometry (ICP/OES) is a powerful tool for the determination of metals in a variety of different sample matrices. With this technique, liquid samples are injected in to a radiofrequency (RF)-induced argon plasma using one of a variety of nebulizers or sample introduction techniques. The sample mist reaching the plasma is quickly dried vaporized, and energized through collisional excitation at high temperature. The atomic emission emanating from the plasma is viewed in either a radial or axial configuration, collected with a lens or mirror, and imaged on to the entrance slit of a wavelength selection device. Single element measurements can be performed cost effectively with a simple monochromator /photo multiplier tube (PMT) combination, and simultaneous multi element determinations are performed for up to 70 elements with the combination of a polychromator and an array detector. The analytical performance of such systems is competitive with most other inorganic analysis techniques, especially with regards to sample throughput and sensitivity.
Keywords: ICPS, RF Power, Interference

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