Flow injection analysis with inductively coupled plasma time-of-flight mass spectrometry for the simultaneous determination of elements forming hydrides and its application to urine

Determinação de As, Cd e Pb em amêndoas e mesocarpo de babaçu, sapucaia, xixá e castanha-do-pará por espectrometria de absorção atômica

“…Na ausência do efeito de matriz, a razão entre os coeficientes angulares deverá ser o mais próximo de 1, condição que assegura a determinação dos elementos com a calibração do instrumento com soluções aquosas. 18 Os dados das equações das retas, obtidas em meio de 10% v v -1 de HNO 3 e em meio das amostras estão apresentadas na Tabela 3. Os valores das razões entre os coeficientes angulares para Cd, Pb e As, nos diferentes meios, atestam que, nas condições otimizadas, as determinações foram feitas na ausência de interferên-cias da matriz.…”

An Overview of Analytical Applications of Time of Flight-Mass Spectrometric (TOF-MS) Analyzers and an Inductively Coupled Plasma-TOF-MS Technique

“…136 The advantages of ICP-TOF-MS over sequential mass analyzers for fast transient detection and the simultaneous determination of a large number of isotopes in the flow injection (FI) peaks in trace metal analysis have been discussed. [137][138][139][140][141] The absence of spectral skew is highly appreciated. The applicability of a combined FI-hydride generation (HG)-ICP-TOF-MS system to the determination of As, Bi, Ge, Hg, Sb, Se and Sn in urine samples has been examined.…”

“…The applicability of a combined FI-hydride generation (HG)-ICP-TOF-MS system to the determination of As, Bi, Ge, Hg, Sb, Se and Sn in urine samples has been examined. 138 No spectral skew was observed when monitoring 12 isotopes simultaneously in an FI peak of about 10 s width (50% height). Detection limits in the low pg ml -1 , linearity over more than five orders of magnitude, repeatability of 2 -5% and recoveries better than 80% were attained.…”

“…The ICP-TOF-MS has been successfully coupled to LA, [120][121][122][123][124][125][126] ETV, 127 GC, [128][129][130][131][132] liquid chromatography, 133,134 CE 135,136 and FIA. [137][138][139][140][141] Detailed reviews of the development and analytical performance of TOF-MS combined with ICP ion source have been presented. [142][143][144][145] Attempts to couple TOF-MS to a microwave induced plasma (MIP) for elemental analysis have also been described.…”

Isotope ratio precision with transient sample introduction using ICP orthogonal acceleration time-of-flight mass spectrometry

“…Irrespective of such arguments, the use of TOF based detection is an attractive approach to overcome such difficulties and has been pursued in a number of publications. 13,14 Pela´ez et al 15 compared ICP-QMS and ICP-aa-TOF-MS for isotope ratio measurement precision on transients having different full width at half maximum (FWHM) characteristics. They recommended the TOF for peaks narrower than 8 s FWHM or when greater than 15 isotopes were to be measured.…”