A comparison of laser ablation-inductively coupled plasma-mass spectrometry and high-resolution continuum source graphite furnace molecular absorption spectrometry for the direct determination of bromine in polymers

作者：de Gois Jefferson S^*; Van Malderen Stijn J M; Cadorim Heloisa R; Welz Bernhard; Vanhaecke Frank

来源：Spectrochimica Acta Part B: Atomic Spectroscopy , 2017, 132: 50-55.

DOI：10.1016/j.sab.2017.04.003

• Bromine
• Polymer
• Halogen
• LA-ICP-MS
• HR-CS GF MAS

This work describes the development and comparison.of two methods for the direct determination of Br in polymer samples via solid sampling, one using laser ablation-inductively coupled plasma-mass spectrometry (LA-ICP-MS) and the other using high-resolution continuum source graphite furnace molecular absorption spectrometry with direct solid sample analysis (HR-CS SS-GF MAS). The methods were optimized and their accuracy was evaluated by comparing the results obtained for 6 polymeric certified reference materials (CRMs) with the corresponding certified values. For Br determination with LA-ICP-MS, the 79Br signal could be monitored interference-free. For Br determination via HR-CS SS-GF MAS, the CaBr molecule was monitored at 625315 nm with integration of the central pixel +/- 1. Bromine quantification by LA-ICP-MS was performed via external calibration against a single CRM while using the C-12(+) signal as an internal standard. With HR-CS SS-GF MAS, Br quantification could be accomplished using external calibration against aqueous standard solutions. Except for one LA-IC-PMS result, the concentrations obtained with both techniques were in agreement with the certified values within the experimental uncertainty as evidenced using a t-test (95% confidence level). The limit of quantification was determined to be 100 jig g(-1) Br for LA-ICP-MS and 100 mu g(-1) Br for HR-CS SS-GF MAS.

• 出版日期2017-6-1