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Method for detecting iron content in 1, 2-benzisothiazoline-3-ketone

A technology of benzisothiazoline and detection method, applied in 1 field, can solve problems such as low work efficiency, waste of energy, waste of reagents, etc., and achieve the effects of high precision and accuracy, reduction of production cost, and improvement of work efficiency

Active Publication Date: 2021-04-30
DAFENG YUELONG CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Traditionally, mixed acid digestion, dry ashing digestion and oxygen nitrogen bottle combustion are used for the detection and digestion of iron content in organic matter, which is time-consuming. It takes at least one working day to complete a sample analysis, and the work efficiency is low.
[0004] Mixed acid digestion and dry ashing digestion consume electricity and waste energy
[0005] Mixed acid digestion consumes a large amount of concentrated acid and produces a large amount of waste gas, which is very harmful to the analyst's body and highly damaging to the laboratory ventilation equipment. It is a waste of reagents and is not environmentally friendly.
[0006] Mixed acid digestion method and dry ashing digestion method are more dangerous and easy to burn
[0007] The traditional three methods, the reaction process is relatively violent, the requirements for the analysis operators are relatively high, and the precision and accuracy of sample determination are low.
[0008] Existing methods for analyzing the iron content of other organic matter are cumbersome to operate

Method used

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  • Method for detecting iron content in 1, 2-benzisothiazoline-3-ketone
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  • Method for detecting iron content in 1, 2-benzisothiazoline-3-ketone

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0047] In seven 50mL volumetric flasks, add 0.0mL, 1.0mL, 2.0mL, 4.0mL, 6.0mL, 8.0mL, 10.0mL of 10mg / L iron standard solution respectively, then add 4mL of hydrochloric acid solution, 25mL of Methanol solvent and ammonia solution, adjust the amount of ammonia solution so that the pH value in the volumetric flask does not exceed 3. Then add 1mL of hydroxylamine hydrochloride solution, 2mL of 1,10-phenanthroline solution and 10mL of acetic acid-acetate buffer solution with pH=4~5, dilute with water to the 50mL mark, shake well, and let stand for 10~20min.

[0048] Take 0.0mL of 10mg / L iron standard solution as a blank sample, use it to rinse the glass 5cm cuvette and load the sample, adjust the zero point of the spectrophotometer at the wavelength of 510nm, and fill the above 7 volumetric flasks with the cuvette solution, the corresponding absorbance was measured at a wavelength of 510nm, the iron content (ug) was taken as the abscissa, and the corresponding absorbance was used ...

Embodiment 2

[0063] In seven 50mL volumetric flasks, add 0.0mL, 1.0mL, 2.0mL, 4.0mL, 6.0mL, 8.0mL, 10.0mL of 10mg / L iron standard solution respectively, then add 4mL of hydrochloric acid solution, 25mL of Ethanol solvent and ammonia solution, adjust the amount of ammonia solution so that the pH value in the volumetric flask does not exceed 3. Then add 1mL of hydroxylamine hydrochloride solution, 2mL of 1,10-phenanthroline solution and 10mL of acetic acid-acetate buffer solution with pH=4~5, dilute with water to the 50mL mark, shake well, and let stand for 10~20min.

[0064] Take 0.0mL of 10mg / L iron standard solution as a blank sample, use it to rinse the glass 5cm cuvette and load the sample, adjust the zero point of the spectrophotometer at the wavelength of 510nm, and fill the above 7 volumetric flasks with the cuvette solution, the corresponding absorbance was measured at a wavelength of 510nm, the iron content (ug) was taken as the abscissa, and the corresponding absorbance was used a...

Embodiment 3

[0081] In seven 50mL volumetric flasks, add 0.0mL, 1.0mL, 2.0mL, 4.0mL, 6.0mL, 8.0mL, 10.0mL of 10mg / L iron standard solution respectively, then add 4mL of hydrochloric acid solution, 25mL of Acetonitrile solvent and ammonia solution, adjust the amount of ammonia solution so that the pH value in the volumetric flask does not exceed 3. Then add 1mL of hydroxylamine hydrochloride solution, 2mL of 1,10-phenanthroline solution and 10mL of acetic acid-acetate buffer solution with pH=4~5, dilute with water to the 50mL mark, shake well, and let stand for 10~20min.

[0082] Take 0.0mL of 10mg / L iron standard solution as a blank sample, use it to rinse the glass 5cm cuvette and load the sample, adjust the zero point of the spectrophotometer at the wavelength of 510nm, and fill the above 7 volumetric flasks with the cuvette solution, the corresponding absorbance was measured at a wavelength of 510nm, the iron content (ug) was taken as the abscissa, and the corresponding absorbance was u...

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Abstract

The invention discloses a method for detecting the content of iron in 1, 2-benzisothiazoline-3-ketone, which comprises the following steps: respectively measuring absorbance through seven iron standard solutions with different contents, drawing a standard curve by taking the iron content (ug) as an abscissa and taking the corresponding absorbance as an ordinate, calculating to obtain a standard curve formula, and finally detecting the absorbance of a to-be-detected solution of a sample, and substituting the absorbance into a standard curve formula to obtain the iron content of the sample. The method has the advantages that the detection speed is high, the detection method is simple, ventilation equipment damage is reduced, the safety of operators is improved, and the detection method is high in precision and accuracy.

Description

technical field [0001] The invention belongs to the field of chemical industry, in particular to a method for detecting iron content in 1,2-benzisothiazolin-3-one. Background technique [0002] There is currently no method for the detection of iron content in 1,2-benzisothiazolin-3-one. [0003] Traditionally, mixed acid digestion, dry ashing digestion and oxygen nitrogen bottle combustion are used for the detection and digestion of iron content in organic matter, which is time-consuming. It takes at least one working day to complete a sample analysis, and the work efficiency is low. [0004] Mixed acid digestion and dry ashing digestion consume electricity and waste energy. [0005] Mixed acid digestion consumes a large amount of concentrated acid and produces a large amount of waste gas, which is very harmful to the analyst's body and highly damaging to the laboratory ventilation equipment. It is a waste of reagents and is not environmentally friendly. [0006] Mixed aci...

Claims

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Application Information

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IPC IPC(8): G01N21/31G01N1/28
CPCG01N21/31G01N1/28
Inventor 田红林杨小燕
Owner DAFENG YUELONG CHEM
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