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Method for determining silicone oil in cosmetics

A measurement method and technology of cosmetics, applied in the direction of measuring device, color/spectral characteristic measurement, material analysis through optical means, etc., can solve problems such as interference with silicone oil measurement, high toxicity, great environmental and human hazards, etc., to achieve quantitative determination , low toxicity, simple and effective treatment method

Inactive Publication Date: 2013-02-27
PONY TESTING INT GRP SHANGHAI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the literature "Determination of Dimethicone Oil Content in Silicone No. 2 Gel by Infrared Spectroscopy" and "Determination of Dimethicone Oil Content in Lejiansu Capsules by Infrared Spectroscopy", toluene and carbon tetrachloride were used as extraction solvents respectively. The above two solvents are highly toxic, harmful to the environment and human body, and may interfere with the determination of silicone oil

Method used

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  • Method for determining silicone oil in cosmetics
  • Method for determining silicone oil in cosmetics
  • Method for determining silicone oil in cosmetics

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] 1.1 Sample pretreatment

[0022] Accurately weigh 5.00g of a certain brand of lotion into a 25mL colorimetric tube (with 10mL of water inside), transfer it to a 250mL separatory funnel with 50mL of water after dispersion, and shake well to disperse it. Use a pipette to pipette 25mL of n-hexane into the above separatory funnel, shake it well, and let it stand. Take the n-hexane layer and filter through a funnel adding 5g of anhydrous sodium sulfate to remove water, discard the first 2mL of filtrate, and take the filtrate for testing.

[0023] Accurately weigh 1.0g of a certain brand of hand and body lotion into a 25mL colorimetric tube (with 10mL water inside), the following operations are the same as lotion.

[0024] Accurately weigh 2.0g of a certain brand of toothpaste into a 25mL colorimetric tube (with 10mL of water inside), and the following operations are the same as for lotion.

[0025] 1.2 Determination method

[0026] Take n-hexane, standard solution and ext...

Embodiment 2

[0034] 2.1 Sample spike recovery rate

[0035] A certain brand of lotion sample in Example 1 was used to add standard to determine its recovery rate. The added amount was 12.5 mg and 125 mg respectively. Three parallel samples were measured for each concentration, and extraction and measurement were carried out according to Example 1. The average recoveries were 78.7% and 96.4%, respectively, and the relative standard deviations were 12.8% and 14.7%, respectively.

[0036] Obviously, those of ordinary skill in the art can use the present invention to measure the content of silicone oil in cosmetics.

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Abstract

The invention discloses a method for determining silicone oil in cosmetics, which comprises the following steps that a test sample is dispersed with water in a color comparison tube; after being dispersed, the test sample is transferred to a separating funnel with water to be fully shaken; silicone oil in the test sample is extracted with normal hexane; after standing, moisture is removed through filtering, and a filtrate is obtained; and then the content of the silicone oil in the filtrate is determined by using the Fourier transform infrared spectroscopy. According to the method, the test sample matrix is dispersed with the water, the silicone oil is fully extracted with the normal hexane, the pretreatment is easy and quick, the dissolving capacity of the normal hexane to the silicone oil is strong, and the self infrared light does not interfere with the quantification of the silicone oil.

Description

technical field [0001] The invention relates to a detection method of silicone oil, in particular to a detection method of silicone oil in cosmetics. Background technique [0002] As daily necessities and cosmetic raw materials, simethicone series has excellent physical and chemical properties, such as physiological inertness, good chemical stability, odorless and non-toxic, and low surface tension (19-21N.m -1 ) and strong water repellency, non-irritating and non-allergic to the skin, and can form a uniform waterproof, breathable and lubricating protective film on the skin surface. At present, the silicone oil varieties commonly used in various cosmetics mainly include polydimethylsiloxane (also known as dimethyl silicone oil), polymethylphenylsiloxane, polydimethylcyclosiloxane, silicon Ketoethylene glycol copolymer, amino-modified silicone oil, polysiloxane protein copolymer and emulsified silicone oil, etc. Used in hair care products to provide lubrication, luster, sof...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/35G01N21/3577
Inventor 宋薇
Owner PONY TESTING INT GRP SHANGHAI CO LTD
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