SU1352329A1 - Method of quantitative determination of sodium lauryl sulfate - Google Patents

Abstract

This invention relates to analytical chemistry, in particular to the quantitative determination of sodium lauryl sulfate (flax). The goal is the sensitivity of the determination. The determination of flax is carried out by treating a sample of the analyte N, N-dimer s-biacridyl nitrate and chloroform. The organic layer is separated and a solution of alkali and peroxide is added to it, followed by measuring the intensity of chemiluminescence of the mixture. The method allows to achieve a 50-fold increase in the detection sensitivity up to 4 x X 10 µg / ml, at the same time reducing the sample volume required for analysis by 12.5 times. S SL 00 CL HCHE WITH ISD (G

Description

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This invention relates to analytical chemistry and a class for the determination of anionic surfactants (SAS) during their SOD.

from 4-10 to 10 µg / ml, which can be used in the analysis of environmental objects, natural and wastewater, water, food products, detergents, control of products and wastes of the petroleum industry, extraction technology.

The purpose of the invention is to increase the detection sensitivity.

Example 1. In a separating funnel with a capacity of 20-50 ml, 8 ml of the test solution containing 0.005 µg / ml of sodium lauryl sulfate, 0.1 ml of 2.510 M solution of lucigenin and 3 ml of chloroform are placed. Extracted for 2 minutes and allowed to stand for 1 minute to separate the fluid. Separate the organic phase, take 1 ml of it in a cuvette for measurement, mix with 3 ml of O, M KOH solution; Then, 0.5 ml of a 0.7 M solution of hydrogen peroxide is injected and the intensity of luminescence after 1 min is measured using a photomultiplier. The content of sodium lauryl sulfate is found on the appropriate graduation schedule. Found 0.006t 1 0.001 µg / ml.

Example2. 0.026 μg / ml anionic surfactants are placed in a separatory funnel and treated as indicated in Example 2. Found 0.023 + 0.003 μg / ml. - Prima rz. 0.051 μg / ml anionic surfactants are placed in a separatory funnel and treated as indicated in Example 2. Found 0.055tO, 004 μg / ml.

PRI and MER 4. When the content of anionic surfactants is higher than 0.02 µg / ml, measurements can be made not only on the instrument with a photomultiplier, but also on the SF-26 serial spectrophotometer, B-separating funnel with a capacity of 20-50 ml

Or A.Dolinich 5558/41

Compiled by S.Hovanska Tehred M. Morgental

Corr Sub

Circulation 776 VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

. Production and printing company, Uzhgorod, Projecto st., 4

8 ml of a solution containing 0.102 µg / m of sodium lauryl sulfate, 0.2 ml of a 2.5 U M lucigenin solution and 3 ml of chloroform are added, shaken for 2 minutes and the chloroform layer is separated. 2 ml of chloroform are taken, 2 ml of 0.1 M KOH solution is added to it and stirred. Then, transfer the resulting mixture into a measuring cell, add 1 ml of 0.7 M hydrogen peroxide solution and measure the intensity of the chemiluminescence at SF-26. Found 0,10010,002 mcg / ml.

Example5. In a separating funnel with a capacity of 20-50 ml, add 8 ml of a solution containing 0.412 µg / ml of sodium lauryl sulfate and process as indicated in Example 5. Found 0.425 ± 0, µg / ml.

As follows from examples 1-5, the method compared with the prototype allows one to achieve a 50-fold increase in the sensitivity of the determination of anionic surfactants (up to 4-10 µg / ml), simultaneously reducing the sample volume required for analysis by 12.5 times.

Claims (1)

Invention Formula The method of quantitative determination of sodium lauryl sulfate, including the processing of a sample of an analyte with a chemical reagent, extraction of the obtained compound with chloroform, followed by optical analysis of the extract, characterized in that, to increase the sensitivity of the determination, the organic layer is separated, a solution of alkali and hydrogen peroxide is added to it with subsequent measurement of the chemiluminescence intensity of the mixture. Proofreader S. Shakmar Subscription