freshwater chemical properties for New Moscow region

A total of 1600 water samples were collected during 2017-2018 from wells (1215 sites), rivers (225 sites) and springs (160 sites) in the region. Water samples were collected from the well, river, or spring by using a 2-L stainless-steel container. The samples were bottled and then immediately transported to the laboratory for chemical analysis, eliminating the need for conservation methods. For each water sample, 25 parameters were measured. The pH was measured by using a HANNA pH-meter 213. Anions (NO₃, NO₂, PO₄, SO₄ and Cl) were measured by ion chromatography using a Dionex 1100 instrument. NH₄ content was obtained on an HACH DR2800 using colorimetric determination with Nessler’s reagent. Cation (K, Cr, Ni, Ca, Zn, Fe, Mn, Na, Cu, Mg) contents were obtained by inductively coupled plasma atomic emission spectroscopy on an ICP-OES Agilent 5110 spectroscope. Mineralization was measured by gravimetric analysis consisting of evaporation at 105°C in a drying chamber. Alkalinity was obtained by titration with 0.05N HCl. Hardness was measured by titration with Trilon B and eriochrome black.