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Applied Speciation and Consulting, LLC facilitates state of the art, inductively coupled plasma mass spectrometry with dynamic reaction cell (DRC) technology, to accurately determine arsenic, selenium, iron, chromium and various other elements with previously unattainable detection limits. With Dynamic Reaction Cell technology, most polyatomic interferences are reduced to near background levels resulting in dramatic improvements in detection limits and a reduction in biased results.

The DRC is a quadrupole enclosed within a reaction chamber (or cell) that is between the ion lens system and the analyzing quadrupole. A reactive gas such as NH 3 is introduced into the cell. The gas reacts with the ion beam through a number of ion-molecule reaction mechanisms, converting the interfering ions into species that will not interfere with the analyte. The analyte of interest, under the same conditions, remains stable and is able to proceed to the detector. This cleansing process is known as “chemical resolution” (1, 2).

Conventional ICP-MS are prone to interferences from the matrix components that form polyatomic species in the plasma (Table 1). Dynamic reaction cell is designed to reduce interferences and overcome many of these limitations. The end result is the elimination of false-positives and lowest detection limits for the toughest matrices

Table 1. Various analytes and common interferences that affect them

•  S. D. Tanner, V. I. Baranov, Atomic Spectroscopy, 20, 2, 45-52, (1999)
•  K. Kawabata Y. Kishi, and R. Thomas, Analytical Chemistry, Vol. 75, No. 9, 423A, (2003)

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