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Detection method for fatty acid residues in potassium salt type amino acid surfactant

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

Inactive Publication Date: 2017-05-17
GUANGZHOU TINCI MATERIALS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] For the detection of fatty acid residues of amino acid surfactants, derivatization GC is the main analysis method, which has a high advantage in sensitivity, but 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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  • Detection method for fatty acid residues in potassium salt type amino acid surfactant
  • Detection method for fatty acid residues in potassium salt type amino acid surfactant
  • Detection method for fatty acid residues in potassium salt type amino acid surfactant

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Embodiment 1

[0034] This embodiment is used to illustrate the detection method of fatty acid residue in a kind of cocoyl glycinate potassium of the present invention, comprises the steps:

[0035] (1) Standard sample preparation: Accurately weigh standard substances of potassium caprylate, potassium caprate, potassium laurate, potassium myristate, potassium palmitate and potassium stearate with a series of concentration gradients;

[0036] Standard sample 1: prepare standard substances of potassium caprylate, potassium caprate, potassium laurate, potassium myristate, potassium palmitate and potassium stearate containing 500 mg respectively;

[0037] Standard sample 2: prepare potassium caprylate, potassium caprate, potassium laurate, potassium myristate, potassium palmitate and potassium stearate standard substances containing 200 mg respectively;

[0038] Standard sample 3: prepare potassium caprylate, potassium caprate, potassium laurate, potassium myristate, potassium palmitate and pota...

Embodiment 2

[0063] This embodiment is used to illustrate the detection method of fatty acid residue in a kind of cocoyl alaninate potassium of the present invention, and detection step is consistent with embodiment 1, repeats no more.

[0064] The fatty acid residual repeatability data measured in the same batch of cocoyl alaninate potassium are as follows:

[0065]

[0066] The recovery data of the standard addition is as follows:

[0067]

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Abstract

The invention discloses a detection method for fatty acid residues in a potassium salt type amino acid surfactant. The detection method comprises the following steps: firstly, putting the surfactant into a rapid moisture tester and removing volatile matters; accurately weighing a treated sample; adding a derivatization reagent and a catalyst and carrying out a derivatization experiment; and finally, carrying out HPLC (High Performance Liquid Chromatography) analysis and quantitatively detecting the fatty acid residue content in the sample. The detection method can be used for directly derivatizing potassium aliphatate, and an acidifying step is omitted; the time consumption is short, the operation is relatively simple, the accuracy is high, and the detection method does not depend on fatty acid types; and the detection method is applicable to detection of the fatty acid residues of all potassium salt type amino acid surfactant products.

Description

technical field [0001] The invention relates to the technical field of analysis and detection, in particular to a method for detecting fatty acid residues in potassium salt 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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/06
CPCG01N30/06G01N2030/067
Inventor 李泽勇刘康汤仲标陈磊户献雷
Owner GUANGZHOU TINCI MATERIALS TECH
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