Long-term reproducibility detection method for quantitative LIBS using Kalman filtering

Abstract

Long-term reproducibility was defined as the dispersion of measurement results over a few days with the same operator, equipment, and samples, it is one of the important obstacles faced by...

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

“…Te was separated from Fe, Mo and other transition metals using a four-stage column process involving an initial AG1-X-8 anion exchange followed by a TRUSpec separation, then two more stages of anion exchange to remove all matrix elements. A 125 Te- 128 Te double spike was prepared and error-optimised and added to samples and the London Te reference standard. Typical reproducibility of d 130 Te/ 125 Te was found to be ± 0.07& (2SD) with samples containing 20 ng mL −1 .…”

“…A 125 Te- 128 Te double spike was prepared and error-optimised and added to samples and the London Te reference standard. Typical reproducibility of d 130 Te/ 125 Te was found to be ± 0.07& (2SD) with samples containing 20 ng mL −1 . If d 130 Te is measured at this level of analytical precision, it was concluded that terrestrial samples were unlikely to have a signicant impact from mass-independent Te isotope effects in meteorites and terrestrial samples.…”

“…The model was successfully validated using Cu and Si samples that were measured for more than 30 days, significantly reducing long-term RSD. An alternative method, based on the use of Kalman filtering, was proposed by Lu et al 125 to improve long-term reproducibility of LIBS quantitative analysis. The method was validated by the quantitative determination of elemental concentrations in low-alloy steel samples over 10 days.…”