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Method for quick determination of fatty acid residues in amino acid surfactants

A surfactant and amino acid technology, applied in the field of analysis and detection, can solve the problems of large relative molecular mass and high boiling point, and achieve the effects of short time consumption, high accuracy and simple operation

Inactive Publication Date: 2017-04-26
GUANGZHOU TINCI MATERIALS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are great limitations in the determination of fatty acid components with high boiling point, large relative molecular mass and non-volatile

Method used

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  • Method for quick determination of fatty acid residues in amino acid surfactants
  • Method for quick determination of fatty acid residues in amino acid surfactants
  • Method for quick determination of fatty acid residues in amino acid surfactants

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] This embodiment is used to illustrate the rapid detection method of fatty acid residue in a kind of cocoyl glycinate sodium of the present invention, comprises the steps:

[0037] (1) Reagent preparation:

[0038] Standard solution 1: prepare DMF solutions containing 500mg / L caprylic acid, capric acid, lauric acid, myristic acid, palmitic acid and stearic acid respectively;

[0039] Standard solution 2: Prepare DMF solutions containing 200mg / L caprylic acid, capric acid, lauric acid, myristic acid, palmitic acid and stearic acid respectively;

[0040] Standard solution 3: Prepare DMF solutions containing 100mg / L caprylic acid, capric acid, lauric acid, myristic acid, palmitic acid and stearic acid respectively;

[0041] Standard solution 4: Prepare DMF solutions containing 50mg / L caprylic acid, capric acid, lauric acid, myristic acid, palmitic acid and stearic acid respectively;

[0042] Standard solution 5: Prepare DMF solutions containing 25mg / L caprylic acid, capri...

Embodiment 2

[0069] This example is used to illustrate a rapid detection method for myristic acid residues in sodium myristoyl sarcosinate of the present invention, and the detection steps are consistent with those in Example 1, and will not be repeated here.

[0070] The repeatability data of myristic acid residues in the same batch of sodium myristoyl sarcosinate are as follows:

[0071]

[0072] The recovery data of the standard addition is as follows:

[0073]

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Abstract

The invention discloses a method for quick determination of fatty acid residues in amino acid surfactants. The method includes the steps of dispersing the surfactants into deionized water; adding inorganic acid to regulate a pH value to be 1.0-2.0, stirring for a period of time prior to centrifugation, and dissolving a precipitate in DMF; adding a derivatization reagent and a catalyst [potassium fluoride (KF) or cesium fluoride (CsF)], and deriving active matter in a DMF solution; conducting HPLC (high-performance liquid chromatography) analysis and quantifying the fatty acid residues in the amino acid surfactants. The method has the advantages of short consumed time, simplicity in operation, high accuracy and independency of fatty acid types and is applicable to determination of the fatty acid residues in all amino acid surfactant products.

Description

technical field [0001] The invention relates to the technical field of analysis and detection, in particular to a rapid detection method for fatty acid residues in amino acid surfactants. Background technique [0002] As a representative of green surfactants, amino acid surfactants are extremely mild and have excellent foaming ability, and are widely used in personal care products such as shampoos, body washes, and facial cleansers. Suitable for sensitive skin, the skin feels soft and comfortable after use. [0003] At present, industry adopts Schotten-Baunmann (Schotten-Baunmann) condensation method to produce amino acid surfactants, that is, fatty acyl chloride and amino acid are reacted in alkaline water / hydrophilic organic solvent mixed phase to complete fatty acyl amino acid salt, and then The fatty acylamino acid is separated by acidification with an inorganic acid, and then neutralized with an alkali to become a relatively pure fatty acylamino acid salt. In the prod...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/02G01N30/06
CPCG01N30/02G01N30/06G01N2030/042
Inventor 李泽勇陈磊户献雷
Owner GUANGZHOU TINCI MATERIALS TECH
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