METHOD FOR COPPER (II) AND MANGANESE (II) DETERMINATION BY INDICATING TUBE IN CASE OF THEIR JOINT PRESENCE IN SOLUTIONS FOR NATURAL WATERS ANALYSIS Russian patent published in 2017 - IPC G01N31/22 G01N21/78 C01G3/00 C01G45/00 

FIELD: chemistry.

SUBSTANCE: invention can be used for semiquantitative manganese (II) and copper (II) determination in aqueous solutions, in particular in natural and waste waters under field conditions. The method comprises filling of a glass tube with an inner diameter of 0.5 cm with Na- form of macroreticular carbonaceous resin "КБ-2Э-16" based on polymethacrylate diethylene glycol divinyl ether, followed by filling with the sample solution. At that, at the first stage, copper (II) is determined visually along the length of the coloured resin area at a pH of about 4.5 and ionic strength of 0.1 (NaNO₃) of the analyzed solution. At the second stage, after solution passage, manganese (II) is determined along the length of the coloured resin area which appears with the addition of formaldoxime complexing agent and NaOH to the indicator tube to create pH ~10.

EFFECT: method reduces complexity, reduces the amount of reagents and time of analysis for copper and manganese determination in an aqueous solution under field and laboratory conditions.

2 dwg, 1 ex