Atomic absorption determination of cadmium, lead, and mercury in sea and river suspensions using an electrothermal atomizer with two vaporization zones

Atomic spectrometry update. Environmental analysis

“…2.4.1 Atomic absorption spectrometry. Russian researchers 143 have developed an ETAAS instrument with two vaporization zones for the simultaneous determination of Cd, Hg and Pb in sea and river waters. Silver nanoparticles, prepared by the reduction of silver nitrate with sodium citrate, have been proposed as a new modifier for the elimination of interferences when determining As and Sb in seawater.…”

“…The simplified chemical separation employs mainly HCl as the eluting reagent, resulting in rapid purification in three working days. The same Chinese research group 381 demonstrated precise and accurate measurements of 143 Nd/ 144 Nd without separating Nd from Sm. Instrumental mass discrimination was corrected using 146 Nd/ 144 Nd as an internal standard, after correction of the isobaric interference of 144 Sm on 144 Nd using interference-free 147 Sm/ 149 Sm for mass fractionation.…”

Absorbance biosensors-based hybrid $$\mathbf {MoS_{2}}$$ nanosheets for Escherichia coli detection

“…Hence, a biosensor based on nanomaterials, a new point-of-care method that detects pathogens with high selectivity and sensitivity, is attracted huge attention recently 7 . Some biosensing technologies have been developed, such as electrochemistry 8 , 9 , colorimetry 10 , 11 , and field effect transistors 12 . Among these techniques, optical biosensors based on nanomaterials are commonly used to detect DNA due to their abilities in real-time monitoring of measuring the DNA with high sensitivity, selectivity, and multi-analyte detection 13 .…”

“…Pure Molybdenum disulphide ( ) nanosheets is a 2D transition metal dichalcogenide, a typical graphene-like material 15 – 18 . They show strong adsorption ability for single-stranded DNA (ssDNA) 8 , 10 , 12 , 19 – 22 . Apart from the properties, also gains attention based on its easy-to-find materials and uncomplicated protocol 23 .…”