University of North Florida
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Stuart Chalk, Ph.D.
Department of Chemistry
University of North Florida
Phone: 1-904-620-1938
Fax: 1-904-620-3535
Email: schalk@unf.edu
Website: @unf

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Leaves

Classification: Plant -> corn -> leaves

Citations 1

"Evaluation Of A Flow Injection System Combined With An Inductively Coupled Plasma Mass Spectrometer With Thermospray Nebulization For The Determination Of Trace Levels Of Platinum"
Anal. Chim. Acta 1996 Volume 320, Issue 1 Pages 1-10
M. Parent, H. Vanhoe, L. Moens and R. Dams*

Abstract: A method was developed for the determination of Pt by flow injection ICP-MS with thermospray nebulization (TN). Sample (100-500 µL) was injected into a carrier steam (0.8 ml/min) which was merged with two other streams (both at 0.8 ml/min) to allow for online sample dilution (or addition of internal standard) and online standardization. The TN was operated at 55 W with an aerosol temperature of 120°C, a carrier gas flow-rate of 830 ml/min and a sample uptake of 1.33 ml/min. Mass spectra were recorded over the range m/z 190-207 using 512 channels with a dwell time of 160 µs and a total acquisition time of 30 s. 195Pt was determined by partially integrating the transient signal. A detection limit of 8 ng/l (1.6 pg absolute) was achieved with a 200 µL injection volume. The use of pneumatic nebulization as an alternative to TN produced a detection limit of 25 ng/l (5.1 pg absolute). The RSD (n = 4) were similar (1.4-1.5%) for both nebulization techniques. The method was applied to the determination of Pt in mouse liver and corn leaves following acid digestion with HNO3/HClO4 and also in calcium phosphate powder. Ir or Tl was used as internal standard and three calibration techniques were compared, namely, external calibration, standard addition and isotope dilution.
Platinum Mass spectrometry Sample preparation