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Título : Mixed-gas inductively coupled plasma atomic emission spectrometry using a direct injection high efficiency nebulizer
Autor : Chirinos, José
Kahen, Kaveh
O´Brien, Su-Ann
Montaser, Akbar
Palabras clave : Direct injection high efficiency nebulizer
DIHEN
Mixed-gas inductively coupled plasmas
Atomic emission spectrometry
Matrix interferences
Computer simulation
Fecha de publicación : 2002
Editorial : Analytical and Bionalytical Chemistry
Citación : Anal Bioanal Chem (2002) 372 :128–135
Resumen : Experimental studies and computer simulations were conducted to identify plasma operating conditions and to explore and contrast the excitation conditions of Ar, Ar-O2, and Ar-He inductively coupled plasmas (ICPs) for the introduction of microliter volumes of sample solutions with a direct injection high efficiency nebulizer (DIHEN). The best MgII 280.270 nm/MgI 285.213 nm ratio (6.6) measured with Ar ICP atomic emission spectrometry for the DIHEN (RF power = 1500 W; nebulizer gas flow rate = 0.12 L min–1) was less than the ratio (8.2) acquired on the same instrument for conventional nebulization (1500 W and 0.6 L min–1). Addition of small amounts of O2 or He (5%) to the outer gas flow improved excitation conditions in the ICP, that is, a more robust condition (a MgII/MgI ratio of up to 8.9) could be obtained by using the DIHEN with Ar-O2 and Ar-He mixed-gas plasmas, thereby minimizing some potential spectroscopic and matrix interferences, in comparison to Ar ICPAES.
URI : http://hdl.handle.net/123456789/14485
ISSN : 618-2650
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