Method for detecting barium and zinc in zinc-barium liquid compound stabilizer

A compound stabilizer and liquid barium-zinc technology, which is applied in the detection field, can solve the problems of large error, unfavorable test method popularization and high price, and achieve the effect of low cost, easy promotion and application, and accurate results

Active Publication Date: 2014-07-30
SHANDONG ANENG CONVEYOR BELT & RUBBER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] (3) The titration method is the back titration method, which has a large error compared with the direct titration method
[0016] And for liquid barium-zinc composite stabilizer, its barium content should be controlled at 5.1-6.0%, zinc content should be control

Method used

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  • Method for detecting barium and zinc in zinc-barium liquid compound stabilizer
  • Method for detecting barium and zinc in zinc-barium liquid compound stabilizer
  • Method for detecting barium and zinc in zinc-barium liquid compound stabilizer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] (1) Weigh 1.0000 g of liquid barium-zinc composite stabilizer sample, add 10 ml of No. 120 solvent gasoline to fully dissolve, dilute to 100 ml with absolute ethanol, shake well, and set aside.

[0047] (2) Pipette two parts of each 50ml of the solution prepared in step (1), add 20ml of 10% ammonium fluoride aqueous solution to one of them, then add 10ml of ammonia-ammonium chloride buffer solution with pH=10, add chrome black T Use 5 drops of indicator, titrate with EDTA standard titration solution until the solution turns pure blue as the titration end point, record the volume V of EDTA standard titration solution consumed 1 ; Another part does not add ammonium fluoride, all the other processes are the same, record the volume V of EDTA standard titration solution consumed 2 ; Calculated according to formula 1 and formula 2, the results are shown in Table 1.

[0048] Table 1 Barium, zinc content measurement results

[0049]

Embodiment 2

[0051] Methodological investigation:

[0052] (1) Specificity

[0053] The metal effective components in the liquid barium-zinc organic compound stabilizer of the present invention are only barium and zinc, and solvent gasoline and absolute ethanol are used as solvents in the experimental method, so the added solvent and medicine in the whole experimental process have no other obvious interference of impurity ions. Ammonium fluoride is used as a masking agent, and the pH is controlled at 10 to mask barium ions, so that the content of each metal component can be detected. By investigating the addition amount of ammonium fluoride, determine the suitable range of the addition amount of ammonium fluoride.

[0054] see results figure 1 , it can be seen from the figure that when the amount of ammonium fluoride added is too small, there are interfering ions participating in the reaction, and the detection result of zinc content is too high. In this experiment, the fluoride ions in ...

Embodiment 3

[0060] Comparative Test:

[0061] Get the same batch of liquid barium-zinc composite stabilizer samples, adopt atomic absorption spectrophotometry and the method of the present invention to measure respectively, the results are shown in Table 2.

[0062] Table 2 Comparison of the results of different assay methods

[0063]

[0064] Can find out by comparison, method of the present invention is close to atomic absorption spectrophotometry measurement result, therefore, method of the present invention can be used for measuring the content of barium and zinc in the liquid barium-zinc composite stabilizer.

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Abstract

The invention discloses a method for detecting barium and zinc in a zinc-barium liquid compound stabilizer. The method comprises the following steps: (1) dissolving a zinc-barium liquid compound stabilizer sample by using 120# solvent gasoline, wherein the ratio of the sample quality to the solvent gasoline volume is 1:(10-15) (g/ml); adding absolute ethyl alcohol to metered volume, wherein the metered volume is V, and shaking to be even; (2) transferring two parts of solutions with the same volume prepared in the step (1), adding ammonium fluoride and water to one part of solution to dissolve ammonium fluoride, and then adding an ammonia-ammonium chloride buffer solution of which the pH is 10; adding a plurality of drops of eriochrome black T indicators, carrying out titration by using an ethylene diamine tetraacetic acid (EDTA) standard titration solution until the titration end point of which the solution becomes pure blue; recording the volume V1 of consumed EDTA standard titration solution, calculating the content of zinc in the sample; not adding ammonium fluoride to the other part of solution, and carrying out the same treatment processes; recording the volume V2 of the consumed EDTA standard titration solution, and calculating according to the formula 2, so as to obtain the content of barium in the sample. The method is simple in apparatus, and accurate and reliable in result, and the content of zinc and barium can be respectively determined.

Description

technical field [0001] The invention relates to a detection method, in particular to a detection method of barium and zinc in a liquid barium-zinc composite stabilizer. Background technique [0002] Liquid barium-zinc composite stabilizer is widely used in adhesive tapes, plastics, chemicals and other fields because it is clean and environmentally friendly, easy to measure, and has no dust pollution during production and application. [0003] At present, the test method for metals in liquid barium-zinc composite stabilizer is as follows: Weigh (0.2-0.3) g (accurate to 0.0001 g) sample, place it in a 250ml Erlenmeyer flask, and use 5mlNY-200 solvent oil (A.1.5) After dilution (heating in a water bath if necessary), add (30-50) ml of ethanol (A.1.4) and shake well, then accurately add 10 ml of EDTA standard titration solution (0.05mol / L) and shake well, then add 10 ml of ammonia buffer solution (PH = 10), add a small amount of chrome black T indicator (0.5%) and titrate with ...

Claims

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Application Information

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IPC IPC(8): G01N31/16
Inventor 牛腾牛飞武金和徐凤娟
Owner SHANDONG ANENG CONVEYOR BELT & RUBBER
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