Noise identification and sampling frequency determination for precise Pb isotopic measurements by quadrupole-based Inductively Coupled Plasma Mass Spectrometry

• DOI: 10.1051/analusis:2000146
• Publication Date: 2003-08-13T12:27:22Z
• Authors: F. Monna; J.-L. Loizeau; B. Thomas; C. Guéguen; P.-Y. Favarger; R. Losno; J. Dominik
• Keywords: [SDE] Environmental Sciences; optimisation; [SDV]Life Sciences [q-bio]; 7. Clean energy; 01 natural sciences; plomb; ddc:550; élément métallique; METHODOLOGIE;CONTROLE DE QUALITE;ANALYSE; Optimisation; métal lourd; isotope; CONTROLE DE QUALITE; 0105 earth and related environmental sciences; info:eu-repo/classification/ddc/550; Quality control; mesure; 540; Instrumental parameters; spectrométrie de masse à plasma; 543; bruit; [SDV] Life Sciences [q-bio]; Lead isotope ratios; Inductively coupled plasma mass spectrometry; ANALYSE; 13. Climate action; [SDE]Environmental Sciences; précision de la mesure; Noise; METHODOLOGIE

Analytical precision of the isotope ratios measured by quadrupole-based ICP-MS is drastically controlled lowfrequency noises which originate from nebulisation and vaporisation processes, sample introduction systems.The undesirable influence these latter can be however reduced choosing efficiently operating parameters.In present study, choice stabilisation time necessary in peak jump mode, one number sweeps are discussed light noise power spectra obtained with various speeds peristaltic pump used as system.Obviously, settings proposed probably efficient only on our own ICP-MS, but they determined without any difficulty other equipment, following methodology detailed here.With such guidelines, experimental within-run RSD % were observed closely those predicted counting statistics (∼ 110 %).The isotopic measurements natural samples (overbank sediments, airborne particulate matter, lichens rainwater) exhibited fair accuracy good reproducibility, making highly convenient use at least an environmental purpose.