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An aqueous two-phase system and its application in enriching trace amounts of fluorescent agents in facial masks

A two-phase system and fluorescent agent technology, applied in the field of analytical chemistry, can solve problems such as lack of data for separation and enrichment of dyes, and achieve the effects of avoiding long phase separation time, small relative standard deviation and simple operation.

Inactive Publication Date: 2018-10-30
CHANGAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But so far, the data on the separation and enrichment of dyes with ionic liquid two-phase system as an extraction system are still very scarce. At the same time, there are few reports on the research on pyridine-based ionic liquid two-phase system. Theoretical and Practical Significance

Method used

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  • An aqueous two-phase system and its application in enriching trace amounts of fluorescent agents in facial masks
  • An aqueous two-phase system and its application in enriching trace amounts of fluorescent agents in facial masks
  • An aqueous two-phase system and its application in enriching trace amounts of fluorescent agents in facial masks

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] Take 8.0g of 1-butyl-3-picoline tetrafluoroborate ionic liquid in a centrifuge tube, add 1.6g of ethyl acetate and an appropriate amount of distilled water to make the total mass in the centrifuge tube 10g; put 2g of the mask essence to be tested ( Taken from "Beautiful Master" orange moisturizing and whitening essential oil mask, manufacturer: Guangzhou Yilumei Cosmetics Co., Ltd., place of origin Guangzhou, production batch number: B.H.0908) added to the two-phase extraction system, and then heated at 40°C and pH 7.5 Under the condition of ultrasonic vibration for 30min, after phase separation, it was extracted at constant temperature for 2h.

[0063] In order to test the effect of the present invention on separating and enriching trace fluorescent agents in cosmetic whitening facial masks, the fluorescent agent determination test is carried out to it, and the extraction rate can reach 98.6%, showing that this invention has a good effect on trace fluorescent agents in ...

Embodiment 2

[0065] The preparation method in this example is the same as in Example 1, the only difference is that the conditions in the preparation process are different. In this example, the ionic liquid is changed to 1-ethyl-3-methylimidazolium tetrafluoroborate, and the remaining conditions constant.

[0066] In order to test the effect of the present invention on the separation and enrichment of trace fluorescent agents in cosmetic whitening facial masks, a fluorescent agent determination test was carried out on it, and the extraction rate can reach 61.5%, which shows that this invention can separate and enrich trace fluorescent agents in cosmetic whitening facial masks The effect is average.

Embodiment 3

[0068]The preparation method in this example is the same as that in Example 1, except that the conditions in the preparation process are different. In this example, ethyl acetate is changed to an equivalent amount of isopropanol, and the rest of the conditions remain unchanged.

[0069] In order to test the effect of the present invention on separating and enriching trace fluorescent agents in cosmetic whitening facial masks, a fluorescent agent determination test was carried out. The extraction system prepared in the above steps cannot achieve the effect of separating and enriching the fluorescent agent and other substances in the sample. The organic phase contains a large amount of fluorescent agent, and the extraction rate is 56.8%, which shows that this invention is effective for trace fluorescent agents in cosmetic whitening masks. The separation and enrichment effect is poor.

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Abstract

The invention discloses an aqueous two-phase system and applications thereof in enrichment of trace fluorescent agents in facial masks. The aqueous two-phase system comprises an N-butyl-3-methylpyridinium tetrafluoroborate ionic liquid, ethyl acetate and water. The aqueous two-phase system comprises 70-82% by mass of the N-butyl-3-methylpyridinium tetrafluoroborate ionic liquid and 15-18% by mass of the ethyl acetate, with the balance being the water and the sum of mass percentages of the ionic liquid, the ethyl acetate and the water being 100%. The extraction rate of the trace fluorescent agents in the facial masks through the aqueous two-phase system reaches 98.6%. The aqueous two-phase system is advantaged by a wide linear range, a low detection limit, low relative standard deviation and a high recovery rate of samples. The aqueous two-phase system meets national detection requirements for fluorescent agents added into cosmetics in China and is simple in operation and suitable for quantification analysis on the trace fluorescent agent in the facial mask.

Description

technical field [0001] The invention belongs to the field of analytical chemistry, and in particular relates to a two-phase aqueous system and the application of trace fluorescent agents in enrichment facial masks. Background technique [0002] Fluorescent whitening agent is a kind of fluorescent dye, or white dye, which is also a complex organic compound. Brighteners have a cyclic conjugated system in chemical structure, such as: stilbene derivatives, phenylpyrazoline derivatives, benzopyridine derivatives, coumarin derivatives, and naphthalene diformyl Amine derivatives, etc. Its characteristic is that it can absorb incident light to produce fluorescence, so that the dyed substance can obtain a sparkling effect similar to fluorite, and make the substance visible to the naked eye very white, achieving the effect of whitening. Its function is to convert the invisible ultraviolet radiation absorbed by the product into purple-blue fluorescent radiation, which is complementar...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N1/40
CPCG01N1/4055G01N2001/4061
Inventor 李宇亮黄蓉朱棋卢筱佳孙钰琨
Owner CHANGAN UNIV
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