Methods for determining and identifying ferrocyanide ion content and manganese content in potassium manganese ferrocyanide

A technology of potassium manganese cyanide and ion content, which is applied in the field of analysis and detection, can solve problems affecting accuracy, etc., and achieve the effect of simple instrument, low detection cost and obvious color

Active Publication Date: 2019-03-22
CHANGZHOU INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When performing performance research and application development on manganese potassium ferrocyanide, th

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Embodiment 1: the mensuration of ferrocyanide ion content in manganese potassium ferrocyanide

[0035] ① Weigh 50.0 mg of potassium manganese ferrocyanide solid powder, add 25.0 mL of 10% sodium hydroxide solution and stir for one hour, then add 3.0 mL of sulfuric acid and stir for half an hour to dissolve potassium manganese ferrocyanide, Add water to make up the volume in a 100.0mL volumetric flask, and prepare a solution with a certain concentration.

[0036] ②Prepare standard solutions of potassium ferricyanide with different concentrations.

[0037] ③Take an appropriate amount of manganese potassium ferrocyanide solution, add sodium fluoride and sodium periodate, until the color of the solution no longer changes, use a UV spectrophotometer to scan in the range of 250-500nm, and select the absorption peak at 302nm Value, using potassium ferricyanide standard curve method to measure the concentration of ferricyanate in the potassium manganese ferrocyanide solution a...

Embodiment 2

[0040] Embodiment 2: the mensuration of manganese content in manganese potassium ferrocyanide

[0041] 1. 1. with embodiment 1.

[0042] ② Prepare potassium permanganate standard solutions of different concentrations.

[0043] ③Take an appropriate amount of manganese potassium ferrocyanide solution, add sodium fluoride and sodium periodate, until the color of the solution no longer changes, use a spectrophotometer to measure its absorption curve within 400-600nm, and select the maximum absorption wavelength as The absorbance value at 525nm was determined by the standard curve method of potassium permanganate to determine the content of permanganate. Under optimized experimental conditions, the linear range of photometric determination of permanganate is 3.2×10 -5 to 3.2×10 -4 mol / L, the correlation coefficient is 0.9998. The relative standard deviation of 11 parallel determinations was 0.4%, reflecting good reproducibility and stability. The experiment measured the concen...

Embodiment 3

[0044] Embodiment 3: the identification of manganese potassium ferrocyanide

[0045] 1. 1. with embodiment 1.

[0046] ② Prepare potassium ferricyanide standard solution and potassium permanganate standard solution with different concentrations.

[0047]③Take an appropriate amount of manganese potassium ferrocyanide solution, add sodium fluoride and sodium periodate, until the color of the solution no longer changes, use a UV spectrophotometer to scan in the range of 250-600nm, and select wavelengths of 525nm and 302nm The absorption value of the absorption peak is determined by the standard curve method of potassium ferricyanide and the standard curve method of potassium permanganate to measure the concentration of ferricyanide and the concentration of permanganate in the manganese potassium ferrocyanide solution after oxidation. The concentration of ferricyanide ions in the oxidized potassium manganese ferrocyanide sample was found to be 2.13×10 -4 mol / L, the concentration...

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Abstract

The invention belongs to the technical field of analysis and detection, and discloses methods for determining and identifying ferrocyanide ion content and manganese content in potassium manganese ferrocyanide. The method for determining the ferrocyanide ion content in the potassium manganese ferrocyanide comprises the following steps: 1, using a spectrophotometric method to determine the content of iron cyanide radical in a mixed solution in which the potassium manganese ferrocyanide is oxidized into permanganate and iron cyanide radical salt; 2, using a spectrophotometric method to determinethe content of iron cyanide radical in a mixed solution obtained after adding an iron salt solution into the potassium manganese ferrocyanide solution to remove ferrocyanide ions; 3, calculating the ferrocyanide ion content in the potassium manganese ferrocyanide according to the data of the previous two steps. The method has the characteristics of being stable, rapid, convenient and fast, simple,and the like.

Description

technical field [0001] The invention belongs to the technical field of analysis and detection, and in particular relates to a method for measuring and identifying ferrous hydrogen ion content and manganese content in potassium manganese ferrocyanide, and specifically relates to the application of a photometric method. Background technique [0002] The iron element in manganese potassium ferrocyanide is divalent iron, and the iron element in manganese potassium ferricyanide is ferric iron. Because ferrous iron can be oxidized to ferric iron, a certain amount of potassium manganese ferricyanide will be contained in the potassium manganese ferrocyanide prepared in practice. When performing performance research and application development on potassium manganese ferrocyanide, the content of potassium manganese ferricyanide in potassium manganese ferrocyanide may affect its accuracy. Therefore, it is very important to identify the content of ferrous ion in the prepared potassium ...

Claims

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Application Information

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IPC IPC(8): G01N21/33G01N1/38
CPCG01N1/38G01N21/33
Inventor 壮亚峰陈建欣吴学文王丽
Owner CHANGZHOU INST OF TECH
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