Preconcentration of heavy metal ions on magnetic multi-walled carbon nanotubes using magnetic solid-phase extraction and determination in vegetable samples by electrothermal atomic absorption spectrometry: Box–Behnken design

Atomic spectrometry update: review of advances in the analysis of clinical and biological materials, foods and beverages

“…The corresponding values for Zn, determined over a period of 6 months using the CRM IRMM-3702 and CRM IRMM-651, were d 66 Zn 3702 : 0.00 ± 0.02& (n = 15) and d 66 Zn 3702 : −11.6 ± 0.03& (n = 8). Measurements of the207 Pb :206 Pb and208 Pb :206 Pb ratios in NIST SRM 981 yielded the values (±2 SD, n = 36) of 0.9145 ± 0.0003 and 2.1661 ± 0.0004 (2 SD, n = 36), respectively, reported as being in good agreement with other literature values. Copper, Pb and Zn isotope data in RMs were obtained from four replicate analysis of each material.…”

“…Recovery aer the separation process, evaluated from eight RMs, was 99.2%. Comparison of the208 Pb :206 Pb and207 Pb :206 Pb values of the reference solution NIST SRM 981 analysed with or without the chemical separation step did not show evidence of isotope fractionation. AE647 and CRM ERM-AE633, were d 65 Cu AE647 : 0.00 ± 0.02& (n = 54) and d 65 Cu AE647 : −0.21 ± 0.03& (n = 33).…”

“…For other elements, the assigned values varied from 0.0032 ± 0.0002 mg L −1 (Cs) to 8090 ± 220 mg L −1 (S). Isotope ratios were reported by only one (Pb) and two (Sr) laboratories and their values were 0.712845 for 87 Sr : 86 Sr, as the average of the two reported results) and 15.535 and 0.899 for 207 Pb : 204 Pb and 207 Pb : 206 Pb, respectively.…”

“…The concentrations of B and Pb (by ICP-MS) as well as Sr (by Zeeman-corrected GFAAS) were determined in samples of Lambrusco wine of different PDOs. In addition, isotope ratios (d11 B, d18 O, 206 Pb :204 Pb,207 Pb :204 Pb,207 Pb :206 Pb,208 Pb :204 Pb,208 Pb :206 Pb, and 87 Sr : 86 Sr) were measured by MC-ICP-MS, aer acid digestion and SPE. These datasets, analysed by ANOVA, post hoc Tukey-Kramer test and PCA, allowed to identify the origin of the wine samples…”

Comparative analysis of three immunochromatographic test strips for rapid detection of cadmium ion in Asparagus

“…Currently, methods for detecting heavy metals can be categorised as instrumental analysis and rapid detection methods. Instrumental methods, such as electrothermal atomic absorption spectrometry (ET‐AAS; Khodadadi et al ., 2022), graphite furnace atomic absorption spectrometry (GFAAS; Ge et al ., 2020), atomic absorption spectrometry (AAS; Peter et al ., 2012), laser‐induced breakdown spectroscopy (LIBS; Wang et al ., 2020b), X‐ray fluorescence (XRF; Farahani et al ., 2015), inductively coupled plasma mass spectrometry (ICP‐MS) and inductively coupled plasma optical emission spectrometry (ICP‐OES; El Chafic et al ., 2013), offer high sensitivity, low detection limits, minimal spectral interference and a wide linear range (Planeta et al ., 2021). However, their use for real‐time and on‐site monitoring is limited due to their dependence on expensive equipment, specialised procedures, intricate sample preparation and time‐consuming analysis (Klotz et al ., 2013).…”