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Título : Determination of Phosphorus Oontent in Steels Using Flow Injection into an Argon-Water Carrier for Inductively Coupled Plasma- MassSpectrometry
Autor : Gómez Coedo, Aurora, Dorado López, María Teresa, Padilla, Isabel, Alguacil, Francisco José
Palabras clave : Phosphorus determination;
Inductively Coupled PlasmaMassSpectrometry
Flow injection
Fecha de publicación : Sep-1997
Editor: Iron and Steel Institute of Japan
Resumen: This paper describes a methodology for the determination of phosphorus in steels using argon-water carrier, in flow injection with Inductively Coupled PlasmaMassSpectrometry. "P is a monoisotopic element and its determination, at very low levels, is very difficult due to contamination probiems and interference inherent in the plasmaandsolvents. Theseunduly raise the backgroundbeing necessary asamplepretreatment step to achieve the required contents. To dissolve the samples in this study, a microwavedigestion system wasapplied to minimize the samplepreparation time, the quantities of reagents and the risk of contamination. Amercury cathode electrolysis wasused for performing a rapid matrix removal/analyte enrichment. The use of an argon-water stream as carrier yielded an enhancementin sensitivity and the detection limit was improved by a factor of approximately 2.5 whencomparedwith that experienced using flow injection into an all-water carrier. Optimization of the operating conditions for the argon-water flow injection and for Inductively Coupled Plasma MassSpectrometer, were selected with respect to the peak height sensitivity and wer~ found to be dependent on the nebulizer gas flow-rate, the radio frequency power, the sample injection volume and the carrier flow-rate. The detection limit based on a sample rate of 0.02g m/~1 was 0.4 ,g ' g~1 andthe relative standard deviations at IOOandIO,lg ' /1 Psolution were2.0 and150/0 respectively. Data are presented for 3Standard Reference Materials: JSS003-2, (from Japaneselron and Steel Certified Reference Materials); and ECRM~285-1 and 278-1 (from Bureau of Analysed SampiesLTD).
Descripción : Variante de título de la revista: Iron and Steel Institute of Japan International
Versión del editor:
ISSN: 0915-1559
DOI: 10.2355/isijinternational.37.878
Citación : ISIJ International 37 (9), 878-884 (1997)
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