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Method for qualitatively measuring nonionic surfactants of compounded system

A non-ionic surface and surfactant technology, which is applied in the field of qualitative determination of non-ionic surfactants in compound systems, can solve the problem of spending a lot of time on exploration, and achieve the effect of improving the efficiency of qualitative analysis and the convenience of qualitative methods.

Active Publication Date: 2018-06-12
MEASURING & TESTING TECHN RES INST FUJIAN PROV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The results show that the combination of solid phase extraction and infrared spectroscopy can quickly and reliably identify the types of surfactants contained in some compound surfactants, but this method needs to spend a lot of time exploring various separation conditions of solid phase extraction It is also not suitable for the separation and identification of similar structures such as fatty alcohol polyoxyethylene ether surfactant AEO-9 and fatty amine polyoxyethylene ether AC1815, fatty acid ester polyoxyethylene ether LAE-9 and polyoxyethylene dehydration Sorbitan monostearate TW-60

Method used

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  • Method for qualitatively measuring nonionic surfactants of compounded system
  • Method for qualitatively measuring nonionic surfactants of compounded system
  • Method for qualitatively measuring nonionic surfactants of compounded system

Examples

Experimental program
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Effect test

Embodiment 1

[0050] The analyst was informed that it may contain 1-5 of the above five surfactants. According to the above separation and test conditions, the data of each eluate in Example 1 are shown in Table 4. Compared with Table 3, it can be seen that: ①The pH value of each eluate in Example 1 is not greater than 6, so it does not contain AC1815; ②There is no eluate in step 11 in Table 4, indicating that Example 1 does not contain TW-60 ; 3. Step 2 in Table 4 washes out PAE, indicating that Example 1 contains LAE-9; 4. Table 4 steps 5-9 all wash out the PAP component, indicating that Example 1 contains TX-10; Illustrate, contain AEO-9 in the embodiment 1. Comparing the data of other steps in Table 4 with Table 3, it is finally concluded that Example 1 contains three surfactants: TX-10, LAE-9 and AEO-9.

Embodiment 2

[0052] The analyst was informed that it may contain 1-5 of the above-mentioned 5 kinds of surfactants. According to the above separation and test conditions, the data of each eluate in Example 2 were obtained, as shown in Table 4. Compared with Table 3, it can be seen that: ①The eluate of step 2 in Table 4 contains PAE, indicating that Example 2 contains LAE; ②The pH values ​​of steps 4-9 in Table 4 are all greater than 6, indicating that the example contains AC1815; ③ The eluate of step 11 in Table 4 contains PAET, indicating that Example 2 contains TW-60; ④ All of the eluates of Step 5-9 in Table 4 contain PAP, indicating that Example 2 contains TX-10; ⑤ In Table 4 The eluate in step 5 contains PAE and the amount is large but the pH value is only 7, indicating that Example 2 also contains AEO-9. Combined with the data of other steps in Table 4, it is finally concluded that: Example 2 contains TX-10, LAE-9, AEO-9, AC1815, TW-60 five surfactants.

[0053] The present inventio...

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Abstract

The invention relates to a method for qualitatively measuring nonionic surfactants of a compounded system. According to the method, a C18 adsorbent and 11 eluents with gradually enhanced elution capabilities are adopted, researches on 11 eluates of 5 nonionic surfactants with similar structures, polarities and molecular weights are made by virtue of simple methods of pH test paper, visual measurement, infrared spectrums and the like, pH values, elution amounts and principal component parameters of the 11 eluates of each surfactant form a group of data with strong characteristics, and the nonionic surfactants in the compounded system can be qualitatively analyzed conveniently according to the data of the surfactants. The qualitative method is convenient, no time is required to be consumed in exploring and selecting various chromatographic separation conditions, and the qualitative analysis efficiency is greatly improved; such a concept can not only be used for qualitative analysis overthe compounded system with the 5 surfactants but also be suitable for qualitative analysis over nonionic surfactants in other compounded systems.

Description

technical field [0001] The invention relates to a qualitative determination method for a nonionic surfactant in a compound system, belonging to the technical field of surfactant detection. Background technique [0002] Surfactant has the title of "industrial monosodium glutamate" and is widely used in daily chemical, light industry, textile, construction, petrochemical, metal processing and other production fields. Mainly divided into the following categories: cationic surfactants, anionic surfactants, nonionic surfactants and amphoteric surfactants. Among them, the proportion of non-ionic surfactants is increasing, and there is a tendency to exceed other types of surfactants. The characterization of surfactants is a task that needs to be faced in many fields, such as in the fields of customs commodity classification, chemical formula research, textile auxiliaries analysis, and court evidence. Most nonionic surfactant products exist in the form of compound, and its qualita...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/3563G01N33/00
CPCG01N21/3563G01N33/00G01N2021/3595
Inventor 卢先勇
Owner MEASURING & TESTING TECHN RES INST FUJIAN PROV
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