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Method for determining 4-methoxyphenol in industrial acrylamide

A technology of p-hydroxyanisole and acrylamide, which is applied in the field of determination of p-hydroxyanisole, can solve the problems of strong corrosion of concentrated nitric acid, unsafe operation, and influence on the accuracy of polymerization inhibitors, and achieve high sensitivity and repeatability. Good performance, easy to popularize and apply

Inactive Publication Date: 2012-12-19
江苏南天农科化工有限公司
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  • Abstract
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Problems solved by technology

The traditional method is to use concentrated nitric acid to react with p-hydroxyanisole to form a yellow substance, and then use a spectrophotometer to measure it. The disadvantages are: 1) concentrated nitric acid is extremely corrosive and unsafe to operate; 2) concentrated nitric acid is very easy to make microbial methods A small amount of protein in acrylamide deteriorates and produces yellow substances, which affects the accuracy of detecting polymerization inhibitors

Method used

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  • Method for determining 4-methoxyphenol in industrial acrylamide

Examples

Experimental program
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Effect test

Embodiment 1

[0025] Example 1 The drawing of the standard curve

[0026] Making process to the standard curve of hydroxyzolitzo ether:

[0027] A. Called 0.01g of the standard product of hydroxybenzoic acid among the ice (accurate to 0.0001 g), placed in a 100ml capacity bottle with 50 ml of methampionic acid.Scale;

[0028] B. Take the above solution of 0.5ml, 1ml, 2 ml, 5ml, and 10ml of the above solution, inject the 100ml capacity bottle in turn, set the icylic acid, dilute to 0.5ppm, 1ppm, 2PPM, 5PPM, and 10PPM.

[0029] C. The above standard solution is 10ml in order. At this time, the content of hydroxyl benzene ether in the standard solution is 5ppm, 10ppm, 20ppm, 50ppm, and 100PPM, respectively, and placed in a capacity bottle of 50ml with 20 ml of methamphetamine.Sodium nitrite solution, and dilute it with methamphetamine to the scale, fully mix, and place it for 10 minutes;

[0030] D. Taking icedetic acid as a blank, measure the inhalation of each standard solution under the wavelen...

Embodiment 2

[0034] Example 2 Sample measurement

[0035] Mercy of acrylamide samples containing hydroxythexyl ether, which are divided into two categories: solid powder and water agent: solid powder and water:

[0036] 1. Solid powder

[0037] It is said that about 3g of acrylamide powder containing hydroxybenzenyl ether is dissolved in a capacity bottle of 50ml of methamphetamic acid with 20ml of icycety acid, add 1 mL of sodium nitrite solution, and dilute it with methamphetamine to the scale, mix it fully, place 10 min 10 min., Taking Icephinotic acid as a blank, determine its absorbance at 420Nm, and find the content of the hydroxybenzo ether (C) corresponding to the working curve of the working curve, calculate the content of the hydroxyzenyl ether in acrylamide according to the following formulaThe

[0038] The content of the hydroxyzen benzene ether (PPM) = C / X;

[0039] In the formula, the content of the C-working curve to the hydroxybenzoethyl ether, μg; the quality of X-acrylamide, ...

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Abstract

The invention discloses a method for determining 4-methoxyphenol in industrial acrylamide. The method comprises the following steps of: dissolving methoxyphenol dissolved in a glacial acetic acid solution, adding sodium nitrite to react, so as to generate yellow nitrous acid derivatives; and determining the absorbance of the yellow nitrous acid derivatives by using a spectrophotometer. With the adoption of the method provided by the invention, the problems of insecure operation and poor accuracy which are brought by using concentrated nitric acid to react can be solved. The method is simple and convenient to in operate, good in repeatability, high in sensitivity, and convenient for popularization and application.

Description

Technical field [0001] The present invention involves a method of determining a hydroxyzenyl ether, which is specifically a method of determining the hydroxyl benzene ether in an industrial acrylamide. Background technique [0002] Acrylamide is a white crystal synthetic material, a raw material for the production of polyacrylamide.The acrylamide bond is easy to polymerize. In order to avoid its aggregation, a certain number of polymer-pheasitene ether is needed during transportation.Therefore, it is important to accurately determine the content of hydroxybenzene ether in acrylamide.The traditional method is to generate yellow substances with concentrated nitric acid and hydroxybenzoethyl ether, and then measure it with a spectacular optical meter. The disadvantages are: 1) the rich nitric acid is extremely corrosive and the operation is unsafe;The trace protein in acrylamide deteriorates and produces yellow substances, which affects the accuracy of detecting polymer. Invention ...

Claims

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Application Information

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IPC IPC(8): G01N21/31
Inventor 熊光辉沈瑞华陆煌生顾稀平冯炎娟
Owner 江苏南天农科化工有限公司
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