Flagging and correcting non-spectral matrix interferences with spatial emission profiles and gradient dilution in inductively coupled plasma-atomic emission spectrometry

Cheung, Yan; Schwartz, Andrew J.; Chan, George C.-Y.; Hieftje, Gary M.

doi:10.1016/j.sab.2015.05.004

Cited by 7 publications

(3 citation statements)

References 35 publications

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“…Earlier work by our research group [28][29][30][31][32] demonstrated that spatial emission profiles are effective in identifying the presence of matrix interferences in ICP-OES. When matrix interference exists, shifts in signal patterns occur (either as enhancement or depression) along the vertical axis of the plasma.…”

Section: Flagging Matrix Interferencesmentioning

confidence: 99%

Spatially resolved measurements to improve analytical performance of solution-cathode glow discharge optical-emission spectrometry

Schwartz

Ray

Chan

et al. 2016

Spectrochimica Acta Part B: Atomic Spectroscopy

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Past studies of the solution-cathode glow discharge (SCGD) revealed that elemental and molecular emission are not spatially homogenous throughout the source, but rather conform to specific zones within the discharge. Exploiting this inhomogeneity can lead to improved analytical performance if emission is collected only from regions of the discharge where analyte species emit strongly and background emission (from continuum, elemental and/or molecular sources) is lower. Effects of this form of spatial discrimination on the analytical performance of SCGD optical emission spectrometry (OES) have been investigated with an imaging spectrograph for fourteen atomic lines, with emphasis on detection limits and precision. Vertical profiles of the emission intensity, signal-to-background ratio, and signal-to-noise ratio were collected and used to determine the optimal region to view the SCGD on a per-element basis. With optimized spatial filtering, detection limits ranged from 0.09-360 ppb, a 1.4-13.6 fold improvement over those obtained when emission is collected from the full vertical profile (1.1-840 ppb), with a 4.2-fold average improvement. Precision was found to be unaffected by spatial filtering, ranging from 0.5-2.6% relative standard deviation (RSD) for all elements investigated, closely comparable to the 0.4-2.4% RSD observed when no spatial filtering is used. Spatial profiles also appear useful for identifying optimal line pairs for internal standardization and for flagging the presence of matrix interferences in SCGD-OES.

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Section: Flagging Matrix Interferencesmentioning

confidence: 99%

Spatially resolved measurements to improve analytical performance of solution-cathode glow discharge optical-emission spectrometry

Schwartz

Ray

Chan

et al. 2016

Spectrochimica Acta Part B: Atomic Spectroscopy

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“…The effect of added K was clearly identied but the effect of toluene was too small to be clearly agged. In a follow-up paper 84 the same authors took their procedure a step further by combining the gradient dilution approach with previous research by the same group into spatial emission proles (as discussed in ASU Review J. Anal. At.…”

Section: Graphite Furnacesmentioning

confidence: 99%

“…High-precision Sr isotope ratio measurement by MC-ICP-MS is hindered by isobaric Kr interference on 86 Sr. To improve Sr isotope measurements, Konter et al 128 provided a novel correction procedure to combine the Kr correction with the mass fractionation correction. This involved equating the relationship between the 84 Sr : 88 Sr and 86 Sr : 88 Sr ratios in respect of the 84 Kr and 86 Kr interferences. Results indicated a long-term precision of AE16 Â 10 À6 for 87 Sr : 86 Sr, providing that standard values are normalised on a daily basis.…”

Section: Isotope Ratio Analysis (Ira)mentioning

confidence: 99%

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

Evans

Pisonero

Smith

et al. 2016

J. Anal. At. Spectrom.

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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.

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2023

Inorganic Geochemistry of Coal

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Flagging and correcting non-spectral matrix interferences with spatial emission profiles and gradient dilution in inductively coupled plasma-atomic emission spectrometry

Cited by 7 publications

References 35 publications

Spatially resolved measurements to improve analytical performance of solution-cathode glow discharge optical-emission spectrometry

Spatially resolved measurements to improve analytical performance of solution-cathode glow discharge optical-emission spectrometry

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

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