SU1451590A1 - Method of quantitative analysis of polyacrylamide and polyacrylonitril in aqueous solutions - Google Patents

Abstract

This invention relates to analytical chemistry and can be used in the oil and gas producing pulp and paper industry, in communal households and other areas for the quantitative determination of poly acrylic amide a and polyacrylonitrile in aqueous media that do not contain halogens. The invention makes it possible to shorten the determination time from 1-1.5 hours to 1 minute by treating the sample being analyzed with a complexing agent, silver nitrate, followed by photocolorimetrication of the mixture obtained. 1 tab.

Description

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The invention relates to analytical: chemical chemistry and can be used in oil and gas production, u, ejinrano3 paper industry, in communi- cation; Cologne and other areas 1 for the determination of polyacrylamide a (PAA) I and polyacrylonitrile (PAN) in aqueous media that do not contain halogens. The aim of the invention is to reduce the duration of the determination. An example is a working sample I, containing 1 ml of 0, I of PAA solution, 0.5 ml of 50% silver nitrate solution (reagent) and 3.5 ml of water and a blank sample containing 1 ml of 4.5 ml; water and 0.5 ml of a 50% silver nitrate solution (reagent), I In cuvettes 1 cm thick, subjected to colorimetry using a UV ultraviolet spectrophotometer), the peak of the obtained spectrum at 305 nm is 219 mm. Putting this value on the ordinate axis of the calibration curve and the abscissa wire to the intersection with the calibration straight line, and from the intersection point to the ordinate to the intersection with the abscissa axis, we obtain the result of the analysis: C 0.4997. calculate relative error ana-LIZ a

jCizC.ioo. (0 000; Q | 9971., oo Q

Example 2: A sample is made up containing 1 ml of a 0.3% PAA solution, 5 ml of a 35% solution of ipa reagent and 3.5 ml of water, and a hollow sample containing 0.5 ml of a 35% solution. reagent and 4.5 ml of water. Samples are subjected to spectrophotometry on UVC in cuvettes with a thickness of 1 cm.

The spectrum has a height of 197 mm. The concentration of PAA solutions found from the calibration graph is 0.3015%, the relative determination error is 5%.

EXAMPLE 3. A working sample is prepared containing 1 ml of a 0.1% PAN solution, 0.1 ml of a 30% reagent solution and 3.9 ml of water, and a blank containing 0.1 ml of 30%. reagent solution and 4.9 ml of water. Subject to colorimetrication on UFS The height of the peak of the spectrum at 305 nm was 35 mm. The found concentration of the analyzed solution was 0.0972%, the relative analysis error was 2.8%,

The results of the analysis of solutions of polyacryl amide and polyacrylonitrile prepared on the reservoir water of the field containing sulphates, nitrates, and carbonates in significant quantities are listed in the table.

The accuracy of determination in a known manner is 10%. The duration of the analysis of a working sample by the proposed method is 1 min, and the known 1-1.5 h,

Claims (1)

Invention Formula A method for quantitative determination of polyacrylamide and polyacrylonitrile in aqueous solutions by treating / analyzing an analyzed sample with a complexing agent, followed by photocolorimetrization of the resulting mixture, characterized in that in order to shorten the duration. determinations, silver nitrate is used as a complexing agent. Editor Y. Sereda Compiled by O.Rokachevska Tehred A. Kravchuk Order 7073/42 Circulation 788 VNIIPI State Committee for Inventions and Discoveries at the State Committee on Science and Technology of the USSR 113035, Moscow, Zh-35, Raushsk nab. 4/5     - .. Production and printing company, Uzhgorod, st. Project, 4 1451590  Table continuation Proofreader S. Shekmar Subscription