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Method for measuring content of multiple azoic coupling components in dye or pigment simultaneously

A technology of naphthols and pigments, which is applied to the field of simultaneous determination of multiple naphthols in dyes or pigments, can solve the problem of few detection methods of naphthols, and achieve the effect of rapid determination and simple extraction

Active Publication Date: 2019-03-15
SGS STANDARD TECHNICAL SERVICES SHANGHAI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are few detection methods for naphthol at this stage, and they are only aimed at the detection of the main components in certain naphthol raw materials

Method used

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  • Method for measuring content of multiple azoic coupling components in dye or pigment simultaneously
  • Method for measuring content of multiple azoic coupling components in dye or pigment simultaneously
  • Method for measuring content of multiple azoic coupling components in dye or pigment simultaneously

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] Embodiment 1: the mensuration of naphtheol AS content in the dyestuff

[0058] 1. Preparation of sample solution:

[0059] Mix the dye samples evenly and put them in ziplock bags for later use. Weigh 1g of sample into a 50mL graduated centrifuge tube, add alkalized methanol (mix 200mL of methanol and 1mL of 110g / L sodium hydroxide solution) to make the volume to 20mL, weigh and record the total mass of the centrifuge tube and the contents. After the centrifuge tube was vortexed for 1 min, it was ultrasonically extracted at room temperature for 40 min. Wipe off the residual water outside the centrifuge tube. After cooling to room temperature, weigh the total mass of the centrifuge tube and its contents, and add an appropriate amount of alkalized methanol to make up the total mass recorded before. Put the centrifuge tube into the centrifuge and centrifuge at 7000r / min for 5min. The supernatant was filtered through a 0.22 μm PTFE organic phase filter membrane into the i...

Embodiment 2

[0073] Embodiment 2: the mensuration of naphtheol AS-D content in the pigment

[0074] 1. Preparation of sample solution:

[0075] Mix the pigment samples evenly and put them in ziplock bags for later use. Weigh 1g of the sample into a 50mL graduated centrifuge tube, add alkalized methanol to make the volume to 20mL, weigh and record the total mass of the centrifuge tube and the contents. After the centrifuge tube was vortexed for 1 min, it was ultrasonically extracted at room temperature for 40 min. Wipe off the residual water outside the centrifuge tube. After cooling to room temperature, weigh the total mass of the centrifuge tube and its contents, and add an appropriate amount of alkalized methanol to make up the total mass recorded before. Put the centrifuge tube into the centrifuge and centrifuge at 7000r / min for 5min. The supernatant was filtered through a 0.22 μm PTFE organic phase filter membrane into the injection vial for liquid chromatography analysis.

[0076]...

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Abstract

The invention belongs to the technical field of analytical chemistry and particularly provides a method for measuring content of multiple azoic coupling components in a dye or pigment simultaneously.The method comprises steps as follows: 1), sample pretreatment: dye or pigment samples are mixed uniformly; if the samples are caked, after the caked samples are ground into powder, the samples are mixed uniformly; then the uniformly mixed samples are put in a clean and dry self-sealing bag, sealed and stored for standby application; 2), sample extraction: an appropriate quantity of samples are weighed and ultrasonically extracted by alkaline methanol, and a sample extracting solution is obtained; 3), measurement: concentration of each azoic coupling component in the sample extracting solutionobtained in step 2) is measured by a high performance liquid chromatograph; 4), calculation: content of each azoic coupling component in the samples is calculated according to the concentration of each azoic coupling component in the sample extracting solution obtained by detection in step 3). Compared with the prior art, the measurement method is rapid and simple, the extraction is simple and convenient, and furthermore, separation of multiple azoic coupling components and accurate measurement of the content can be realized.

Description

[technical field] [0001] The invention belongs to the technical field of analytical chemistry, in particular to a method for simultaneously measuring the contents of various naphthols in dyes or pigments. [Background technique] [0002] Naphthol, commonly known as naphtol, is mostly milky white, yellow (green) or brown powder, insoluble in water, but has weak acidity, and can be dissolved in hot caustic soda to become a clear and transparent sodium naphthol solution. Naphthalene is mainly used as a component of ice dyes or in the production of organic pigments. [0003] As a component of ice dyes, naphthols are used for dyeing and printing of cotton fibers, viscose, silk and some synthetic fibers. In printing and dyeing, naphthol is mostly used as a primer, which acts on the color base to form different colors. Such as Naphthol AS, often dyed bright red with bright red base G; dyed purple caramel with maroon base GBC; dyed yellow light orange with orange base GC; dyed blue...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/02G01N30/06
CPCG01N30/02G01N30/06G01N2030/047G01N2030/062
Inventor 阎娜俞安敏冯颖刘平年陈志强牟奇志
Owner SGS STANDARD TECHNICAL SERVICES SHANGHAI CO LTD
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