Permanent chemical modifiers in electrothermal atomic absorption spectroscopic analysis: A review

Section: Fundamentalsmentioning

confidence: 99%

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

Evans

Pisonero

Smith

et al. 2015

“…Publications on the use of PMs in ETAAS were reviewed. 85 The most commonly used PMs: thermally stable carbides, PGMs, and their mixtures were characterised. The sample types considered included organic solutions, suspensions and solid samples, materials aer acid decomposition, and natural and drinking water.…”

Section: Fundamentalsmentioning

confidence: 99%

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

Evans

Pisonero

Smith

et al. 2021

“…The Th-U concentration and isotopic data obtained by the two techniques agreed within estimated errors. The value of these glasses to the community comes from the large 238 U-234 U- 230 Th disequilibria observed, combined with the wide range in Th/U ratios; the long-term aim is to develop them as microanalytical RMs. Given the routine use of the NIST SRM 61x series of glasses for calibrating microanalytical techniques, there are surprisingly few data available on their U isotopic composition.…”

Section: Reference Materials and Data Qualitymentioning

confidence: 99%

“…Improvements in the design of the twovolume ablation cell ensured that the cell volume and gas ow remained truly constant while moving the samples in the sample holder. Samples were corrected for initial thorium disequilibrium using a new formula that accounts for disequilibrium in 230 Th decay. The counts on 204 Pb and 207 Pb were too low to correct reliably for common Pb and other strategies were needed to minimise its inuence on the dataset.…”

Section: Solid Sample Introductionmentioning

confidence: 99%

2014 atomic spectrometry update – a review of advances in environmental analysis

Butler

Cairns

Cook

et al. 2015

This is the 29th annual review of the application of atomic spectrometry to the chemical analysis of environmental samples. This Update refers to papers published approximately between September 2012 and July 2013 and continues the series ofAtomic Spectrometry Updates (ASUs) Developments in geochemical analysis included the production and (re)certification of new geological RMs for bulk, isotopic and microspatial analysis. Optimisation of LA-ICP-MS techniques for the interrogation of geochemical samples continues to be reported and a number of useful instrumental review articles (AMS, ICP-MS and SIMS) have been published.Feedback on this review is most welcome and the review coordinator can be contacted using the email address provided. Sampling techniquesThe development of personal workplace air samplers, used to monitor workers' exposure to airborne particles, continues to be a fertile area of research. cartridge assembly which could then be loaded directly into an XRF system for analysis. Initial wind tunnel tests using test aerosols of known particle size indicated that this sampler could collect representative particle size distributions.Generation of test particle atmospheres in a laboratory environment is difficult and it is most informative to see publications describing the development and validation of aerosol test chambers. A system 21 for source characterisation and controlled human exposure to NPs generated during gas-metal arc welding had an airtight 22 m 3 climate-controlled stainless steel chamber at its core. A variety of online measurements, e.g. using TEOM or SMPS, and offline measurements, e.g. using electron microscopy and PIXE techniques, could be made via sampling ports/samplers. Test particles were generated in a separate chamber and subsequently piped into the main chamber. Stable concentrations of atmospheric particles could be maintained for up to 6 h and concentrations could be varied from <5 µg m by EDXRF spectrometry (Cr, Cu, Fe, Ni, Pb and Zn), there were no significant differences in values between the two measurement approaches (paired t-test, p > 0.2, 95 % CI). In summary, the authors concluded that this method was suitable for the high throughput analysis of lightly loaded air filter samples. 11The bioaccessible metal fraction in urban aerosol particles may be a more informative metric than the total metal composition in assessng the potential health effects of exposure to inhaled particles. . Using this optimised method, the airborne levels of Ag in Buenos Aires was determined to be 2-4.5 ng m , respectively. Emission spectroscopyInvestigation into the use of LIBS for the analysis of aerosol samples is a focus of a number of research groups. Elemental emission intensities were normalised to carbon (measured at 247.856 nm) which could be used as an internal standard because the carbon emission from the underlying nylon filter was much larger and relatively more stable than the signal from the deposited carbonaceous particles. This approach was useful for minimising shot-to-...