The review systematizes the works of the researchers of the Division of Analytical Chemistry at the Moscow State University in the field of chemical colorimetry for the last 10 years. Various...

We analyze and systematize publications in the field of digital colorimetry over the past 15 years. Different versions and possibilities of the method are considered; the fields of its application...

The total reflection X-ray fluorescence determination of mercury(II) in drinking water at concentrations of 7 × 10⁻² to 3.0 µg/L is reported. The mercury(II) preconcentration protocol includes directly suspended droplet microextraction with benzene as a molecular iodine complex. The proposed approach is highly selective. The elements Cr, Mn, Fe, Co, Ni, Zn, and Pb at concentrations up to 0.1 g/L did not interfere with the extraction of trace mercury(II). The method is characterized by high sensitivity (limit of detection of 21 ng/L) and suitable reproducibility (relative standard deviation of 0.12 for 100 ng/L). The accuracy of the results was confirmed by recovery and the method of standard addition.