FIELD: analytical methods.
SUBSTANCE: invention relates to environmental analytical methods, particularly to concentrating trace element in water and aqueous solutions in order to quantitatively determining it such as it could be done with mercury. Method of invention comprises extraction of mercury from aqueous phase into organic component of stratified water-antipyrin-organic acid system and consists in introducing sample, antipyrin, and organic acid, dilution, shaking, and sampling lower phase concentrate. More specifically, 0.7-1.0 mmole sulfosalicylic acid dihydrate is added to test-tube containing 1.5-2.0 mmole antipyrin and then a snow water sample acidified with hydrochloric acid (5 mL acid per 1 L snow water) is added, total volume is brought to 10 mL, test-tube is tightly closed, contents are vigorously shaken, settled at 25°C, and centrifuged, after which 0.5 mL sample of lower organic phase concentrate is analyzed by resonance absorption technique to determine content of mercury obtained via cold vapor method after reduction with sodium borohydride.
EFFECT: enabled determination of mercury in snow water and increased accuracy of analysis.
2 dwg, 2 tbl
