Evaluation of mixing devices and connection mode in the determination of Pb in glass using online isotope dilution laser ablation-ICP-MS

Section: Discussionmentioning

confidence: 99%

Quantitation of the Fe spatial distribution in biological tissue by online double isotope dilution analysis with LA-ICP-MS: a strategy for estimating measurement uncertainty

Douglas

O'Reilly

O'Connor

et al. 2016

“…Feng and Wang 113 provided an assessment of in-line mixing devices used to combine laser ablated product with a 207 Pb spike, prior to measurement of Pb concentration by isotope dilution ICP-MS. Analysis of NIST glasses demonstrated that Pb isotope ratios measured on the combined aerosols from a membrane desolvator and laser ablation were most stable when mixing was completed in a spherical chamber with a sphere-centred exit nozzle.…”

Section: Isotope Dilution Analysis (Ida)mentioning

confidence: 99%

Atomic spectrometry update: review of advances in atomic spectrometry and related techniques

Evans

Pisonero

Smith

et al. 2016

SUMMARY OF CONTENTS This review covers developments in 'Atomic Spectrometry'. It covers atomic emission, absorption, fluorescence and mass spectrometry, but excludes material on speciation and coupled techniques which is included in a separate review. It should be read in conjunctionwith the other related reviews in the series. [1][2][3][4][5][6] Sample introductionThis section covers developments in sample introduction for all instrumental methods. LiquidsLiquid sample introduction relates to methods wherein the sample is introduced into the instrument in the form of a liquid, such as through nebulization or into a thermal vaporizer; whereas in vapour generation the sample is initially in the form of a liquid but is converted to a vapour prior to introduction into the instrument. Sample pre-treatment.A general review of on-line preconcentration for ICP-MS has been published by Das et al. 7 , covering solid phase methods and including 63 references. Several reviews of sample pretreatment methods used for atomic spectrometry are worth noting because they focus on specific areas: Kocurova et al. 8and Jain and Verma 9 have reviewed advances in DLLME (53 references) and SDME (407 references) respectively; Zhao et al. the same authors studied the stability of the labelled complexes at different pH and temperature, and when subject to separation using LC. They reported a significant decrease in stability when LC separation was used, and some degradation at 37 °C compared to 2 °C.Li et al. An immunoassay-linked method using gold nano-particles has been developed by Jarujamrus et al. 33 . In this approach the monoclonal antibody-chloramphenicol was attached to a solid support. Antigen-chloramphenicol was labelled with gold nano-particles (10 nm) at pH 9.5, attached to a bovine serum albumin protein and mixed with unlabelled antigenchloramphenicol, which was then added to the antibody-chloramphenicol. for U and Th respectively in water samples.

“…However the application of on-line ID in the direct analysis of glasses by LA-ICP-MS represents a more complex challenge because of the potential for poor mixing of the spike sample aerosol. 198 In order to obtain the good isotope equilibrium needed for ID-LA-ICP-MS, four different mixing devices (including pre-and postcell introduction of the isotope spike) were designed and evaluated for application to the determination of Pb in silicate glasses. A pre-cell connection mode provided optimum performance in respect of consistency of the blended Pb isotopes, delivered good precision in the measurement of the 208 Pb/ 207 Pb isotope ratio, and exhibited signicantly less loss of sensitivity than in post cell mode.…”

Section: Glassesmentioning

confidence: 99%

Atomic spectrometry update. Review of advances in the analysis of metals, chemicals and functional materials

Carter

Fisher

García³

et al. 2015