Atomic fluorescence spectrometry for ultrasensitive determination of bismuth based on hydride generation – the role of excitation source, interference filter and flame atomizers

Abstract

A method of highly sensitive bismuth determination by hydride generation coupled with in-house assembled non-dispersive atomic fluorescence spectrometry was developed.

Chemical vapour generation assisted by Cr3+/KCN coupled to atomic fluorescence spectrometry for ultrasensitive determination of cadmium in water and rice samples

“…The recorded signals from the PMT (in mV) were treated the same way as described in detail previously. 46 Peak area (in mV s) corrected to the baseline or peak area sensitivity (in mV s L ng −1 ), and a signal to noise ratio (SNR) were the parameters used to evaluate the data. The SNR (in s) was estimated by dividing the peak area from a corresponding Cd standard by an uncertainty of the background level that was determined as an average (n = 2) of the standard deviations of background intensity 15 s before and aer the peak, i.e., calculated from 600 values.…”

“…We adopted the CVG system that yielded the best results in terms of repeatability, reproducibility and CVG efficiency from our previous study, 36 which corresponded to using Cr 3+ /KCN modiers, and coupled this system to a non-dispersive AFS constructed at our laboratory and equipped with an intense electrodeless discharge lamp (EDL) as a radiation source. 43,44,46 Atomization in the two ame atomizers, i.e., MDF and FIGS, was optimized, their performances were compared and the best of them in terms of sensitivity and tolerance towards interferences was selected for analytical applications. The developed methodology was validated for the determination of Cd content in various water samples as well as rice samples aer microwave digestion in a diluted acid medium.…”

Atomic spectrometry update – a review of advances in environmental analysis

“…The LOD was 0.3 ng L −1 . A different approach for improving the sensitivity of AFS for Bi involved 79 modification of the flame atomiser, optimisation of the optical path of the spectrometer and addition of a 307.1 nm interference filter. The LOD was 0.9 ng L −1 in water.…”

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

“…While the practical (if not theoretical) aspects of CVG are well established, there are still gains to be made in optimising the instrumental conguration. This was illustrated by Štádlerová et al 32 who assembled a highly sensitive, nondispersive system for the determination of Bi. The instrument was based around a shielded ame atom cell which was basically a miniature diffusion ame shielded with Ar.…”